/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=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:50:49,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:50:49,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:50:49,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:50:49,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:50:49,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:50:49,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:50:49,614 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:50:49,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:50:49,619 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:50:49,620 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:50:49,621 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:50:49,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:50:49,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:50:49,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:50:49,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:50:49,630 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:50:49,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:50:49,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:50:49,643 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:50:49,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:50:49,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:50:49,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:50:49,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:50:49,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:50:49,652 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:50:49,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:50:49,656 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:50:49,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:50:49,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:50:49,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:50:49,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:50:49,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:50:49,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:50:49,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:50:49,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:50:49,665 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:50:49,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:50:49,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:50:49,665 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:50:49,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:50:49,667 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 [2020-08-18 17:50:49,704 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:50:49,705 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:50:49,706 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:50:49,707 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:50:49,707 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:50:49,707 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:50:49,708 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:50:49,708 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:50:49,708 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:50:49,708 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:50:49,709 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:50:49,709 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:50:49,710 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:50:49,710 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:50:49,710 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:50:49,710 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:50:49,711 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:50:49,711 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:50:49,711 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:50:49,711 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:50:49,711 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:50:49,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:50:49,712 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:50:49,712 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:50:49,712 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:50:49,712 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:50:49,712 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:50:49,713 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:50:49,713 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:50:49,713 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=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:50:49,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:50:50,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:50:50,016 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:50:50,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:50:50,018 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:50:50,019 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-18 17:50:50,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41708f5ee/9fc3b7b2a97c438b968f79f0c811d0d7/FLAGbf76ea541 [2020-08-18 17:50:50,591 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:50:50,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-18 17:50:50,603 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41708f5ee/9fc3b7b2a97c438b968f79f0c811d0d7/FLAGbf76ea541 [2020-08-18 17:50:50,921 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/41708f5ee/9fc3b7b2a97c438b968f79f0c811d0d7 [2020-08-18 17:50:50,930 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:50:50,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:50:50,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:50,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:50:50,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:50:50,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:50" (1/1) ... [2020-08-18 17:50:50,940 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f9fea37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:50, skipping insertion in model container [2020-08-18 17:50:50,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:50:50" (1/1) ... [2020-08-18 17:50:50,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:50:50,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:50:51,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:51,210 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:50:51,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:50:51,344 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:50:51,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51 WrapperNode [2020-08-18 17:50:51,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:50:51,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:50:51,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:50:51,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:50:51,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,363 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (1/1) ... [2020-08-18 17:50:51,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:50:51,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:50:51,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:50:51,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:50:51,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (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 [2020-08-18 17:50:51,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:50:51,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:50:51,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 17:50:51,455 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-18 17:50:51,456 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-18 17:50:51,456 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-18 17:50:51,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:50:51,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:50:51,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 17:50:51,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 17:50:51,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 17:50:51,457 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-18 17:50:51,457 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-18 17:50:51,457 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-18 17:50:51,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:50:51,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:50:51,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:50:51,875 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:50:51,876 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 17:50:51,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:51 BoogieIcfgContainer [2020-08-18 17:50:51,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:50:51,882 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:50:51,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:50:51,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:50:51,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:50:50" (1/3) ... [2020-08-18 17:50:51,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481d1f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:51, skipping insertion in model container [2020-08-18 17:50:51,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:50:51" (2/3) ... [2020-08-18 17:50:51,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481d1f59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:50:51, skipping insertion in model container [2020-08-18 17:50:51,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:50:51" (3/3) ... [2020-08-18 17:50:51,889 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-18 17:50:51,900 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:50:51,907 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:50:51,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:50:51,950 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:50:51,950 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:50:51,950 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:50:51,951 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:50:51,951 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:50:51,951 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:50:51,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:50:51,956 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:50:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-18 17:50:51,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 17:50:51,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:51,986 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:51,986 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:51,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-18 17:50:51,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:51,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044266153] [2020-08-18 17:50:51,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:52,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 17:50:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 17:50:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 17:50:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:52,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044266153] [2020-08-18 17:50:52,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:52,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 17:50:52,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222725657] [2020-08-18 17:50:52,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:50:52,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:52,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:50:52,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:50:52,364 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-18 17:50:52,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:52,523 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-18 17:50:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:50:52,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-18 17:50:52,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:52,539 INFO L225 Difference]: With dead ends: 136 [2020-08-18 17:50:52,539 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 17:50:52,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:50:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 17:50:52,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-18 17:50:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 17:50:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-18 17:50:52,598 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-18 17:50:52,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:52,599 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-18 17:50:52,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:50:52,599 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-18 17:50:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 17:50:52,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:52,603 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:52,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:50:52,604 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:52,604 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-18 17:50:52,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:52,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295337327] [2020-08-18 17:50:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:52,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:52,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 17:50:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 17:50:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:50:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:52,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295337327] [2020-08-18 17:50:52,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:52,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 17:50:52,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759052224] [2020-08-18 17:50:52,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:50:52,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:52,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:50:52,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:50:52,753 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-18 17:50:52,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:52,844 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-18 17:50:52,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:50:52,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-18 17:50:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:52,848 INFO L225 Difference]: With dead ends: 129 [2020-08-18 17:50:52,848 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 17:50:52,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:50:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 17:50:52,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-18 17:50:52,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 17:50:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-18 17:50:52,888 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-18 17:50:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:52,888 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-18 17:50:52,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:50:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-18 17:50:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 17:50:52,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:52,891 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:52,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:50:52,892 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-18 17:50:52,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:52,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304905571] [2020-08-18 17:50:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:52,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:52,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:52,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 17:50:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 17:50:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:50:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:53,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304905571] [2020-08-18 17:50:53,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:53,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:50:53,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687111396] [2020-08-18 17:50:53,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:50:53,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:53,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:50:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:50:53,055 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-18 17:50:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:53,218 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-18 17:50:53,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:50:53,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-18 17:50:53,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:53,224 INFO L225 Difference]: With dead ends: 145 [2020-08-18 17:50:53,226 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 17:50:53,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:50:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 17:50:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-18 17:50:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 17:50:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-18 17:50:53,259 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-18 17:50:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:53,259 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-18 17:50:53,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:50:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-18 17:50:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 17:50:53,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:53,263 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:53,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 17:50:53,267 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-18 17:50:53,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:53,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997560258] [2020-08-18 17:50:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 17:50:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 17:50:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 17:50:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:53,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997560258] [2020-08-18 17:50:53,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:53,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:50:53,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319184084] [2020-08-18 17:50:53,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:50:53,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:53,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:50:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:50:53,391 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-18 17:50:53,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:53,461 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-18 17:50:53,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:50:53,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 17:50:53,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:53,464 INFO L225 Difference]: With dead ends: 156 [2020-08-18 17:50:53,464 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 17:50:53,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:50:53,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 17:50:53,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-18 17:50:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 17:50:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-18 17:50:53,479 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-18 17:50:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:53,480 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-18 17:50:53,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:50:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-18 17:50:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 17:50:53,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:53,482 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:53,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 17:50:53,483 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:53,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-18 17:50:53,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:53,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754923838] [2020-08-18 17:50:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 17:50:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 17:50:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:50:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:53,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754923838] [2020-08-18 17:50:53,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:53,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:50:53,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119446416] [2020-08-18 17:50:53,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:50:53,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:50:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:50:53,695 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-18 17:50:53,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:53,822 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-18 17:50:53,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:50:53,823 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-18 17:50:53,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:53,825 INFO L225 Difference]: With dead ends: 166 [2020-08-18 17:50:53,825 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 17:50:53,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:50:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 17:50:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-18 17:50:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 17:50:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-18 17:50:53,841 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-18 17:50:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:53,842 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-18 17:50:53,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:50:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-18 17:50:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 17:50:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:53,845 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:53,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 17:50:53,845 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:53,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:53,846 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-18 17:50:53,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:53,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970959955] [2020-08-18 17:50:53,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 17:50:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 17:50:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:50:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:53,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970959955] [2020-08-18 17:50:53,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:53,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 17:50:53,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163369148] [2020-08-18 17:50:53,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:50:53,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:53,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:50:53,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:50:53,955 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-18 17:50:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:54,055 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 17:50:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:50:54,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 17:50:54,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:54,057 INFO L225 Difference]: With dead ends: 176 [2020-08-18 17:50:54,057 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 17:50:54,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:50:54,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 17:50:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-18 17:50:54,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 17:50:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-18 17:50:54,071 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-18 17:50:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:54,071 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-18 17:50:54,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:50:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-18 17:50:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 17:50:54,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:54,073 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:54,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 17:50:54,074 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-18 17:50:54,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:54,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23654499] [2020-08-18 17:50:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 17:50:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:50:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 17:50:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,218 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:54,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23654499] [2020-08-18 17:50:54,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:54,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:50:54,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441143438] [2020-08-18 17:50:54,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:50:54,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:54,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:50:54,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:50:54,221 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-18 17:50:54,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:54,353 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-18 17:50:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:50:54,354 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-18 17:50:54,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:54,355 INFO L225 Difference]: With dead ends: 178 [2020-08-18 17:50:54,355 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 17:50:54,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:50:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 17:50:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-18 17:50:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 17:50:54,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-18 17:50:54,368 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-18 17:50:54,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:54,369 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-18 17:50:54,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:50:54,369 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-18 17:50:54,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 17:50:54,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:54,371 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:54,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 17:50:54,371 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:54,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:54,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-18 17:50:54,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:54,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800000300] [2020-08-18 17:50:54,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:54,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:54,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 17:50:54,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 17:50:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 17:50:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:54,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800000300] [2020-08-18 17:50:54,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:54,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 17:50:54,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825749853] [2020-08-18 17:50:54,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 17:50:54,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:54,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 17:50:54,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 17:50:54,476 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-18 17:50:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:54,568 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-18 17:50:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:50:54,569 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-18 17:50:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:54,571 INFO L225 Difference]: With dead ends: 193 [2020-08-18 17:50:54,571 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 17:50:54,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:50:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 17:50:54,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-18 17:50:54,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 17:50:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-18 17:50:54,584 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-18 17:50:54,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:54,585 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-18 17:50:54,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 17:50:54,585 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-18 17:50:54,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 17:50:54,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:54,586 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:54,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 17:50:54,587 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-18 17:50:54,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:54,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984084870] [2020-08-18 17:50:54,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 17:50:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 17:50:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 17:50:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:54,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984084870] [2020-08-18 17:50:54,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:54,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:50:54,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315129507] [2020-08-18 17:50:54,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:50:54,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:54,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:50:54,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:50:54,763 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-18 17:50:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:54,940 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-18 17:50:54,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:50:54,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-18 17:50:54,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:54,943 INFO L225 Difference]: With dead ends: 190 [2020-08-18 17:50:54,943 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 17:50:54,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:50:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 17:50:54,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-18 17:50:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 17:50:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-18 17:50:54,964 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-18 17:50:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:54,964 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-18 17:50:54,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:50:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-18 17:50:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 17:50:54,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:54,966 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:54,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 17:50:54,966 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:54,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:54,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-18 17:50:54,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:54,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806550424] [2020-08-18 17:50:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 17:50:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 17:50:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:50:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:55,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806550424] [2020-08-18 17:50:55,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:55,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:50:55,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009204647] [2020-08-18 17:50:55,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:50:55,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:50:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:50:55,130 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-18 17:50:55,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:55,244 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-18 17:50:55,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:50:55,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 17:50:55,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:55,249 INFO L225 Difference]: With dead ends: 210 [2020-08-18 17:50:55,250 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 17:50:55,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:50:55,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 17:50:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-18 17:50:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 17:50:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-18 17:50:55,262 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-18 17:50:55,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:55,262 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-18 17:50:55,262 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:50:55,262 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-18 17:50:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 17:50:55,263 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:55,264 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:55,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 17:50:55,264 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-18 17:50:55,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:55,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094022607] [2020-08-18 17:50:55,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 17:50:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:50:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 17:50:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:55,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094022607] [2020-08-18 17:50:55,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:55,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:50:55,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731004994] [2020-08-18 17:50:55,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:50:55,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:55,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:50:55,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:50:55,465 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-18 17:50:55,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:55,653 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-18 17:50:55,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:50:55,658 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-18 17:50:55,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:55,659 INFO L225 Difference]: With dead ends: 202 [2020-08-18 17:50:55,660 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 17:50:55,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:50:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 17:50:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-18 17:50:55,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 17:50:55,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-18 17:50:55,678 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-18 17:50:55,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:55,678 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-18 17:50:55,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:50:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-18 17:50:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 17:50:55,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:55,680 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:55,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 17:50:55,680 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:55,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-18 17:50:55,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:55,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447418843] [2020-08-18 17:50:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:55,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 17:50:55,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 17:50:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 17:50:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:55,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447418843] [2020-08-18 17:50:55,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:55,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:50:55,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947408304] [2020-08-18 17:50:55,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:50:55,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:55,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:50:55,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:50:55,803 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-18 17:50:55,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:55,907 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-18 17:50:55,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:50:55,907 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 17:50:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:55,909 INFO L225 Difference]: With dead ends: 227 [2020-08-18 17:50:55,909 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 17:50:55,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:50:55,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 17:50:55,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-18 17:50:55,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 17:50:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-18 17:50:55,921 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-18 17:50:55,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:55,921 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-18 17:50:55,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:50:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-18 17:50:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 17:50:55,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:55,923 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:55,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 17:50:55,923 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:55,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-18 17:50:55,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:55,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021732865] [2020-08-18 17:50:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:55,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 17:50:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 17:50:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 17:50:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:56,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021732865] [2020-08-18 17:50:56,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:56,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:50:56,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920688993] [2020-08-18 17:50:56,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:50:56,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:56,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:50:56,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:50:56,128 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-18 17:50:56,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:56,354 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-18 17:50:56,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:50:56,355 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-18 17:50:56,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:56,359 INFO L225 Difference]: With dead ends: 214 [2020-08-18 17:50:56,359 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 17:50:56,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:50:56,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 17:50:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-18 17:50:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 17:50:56,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-18 17:50:56,374 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-18 17:50:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:56,375 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-18 17:50:56,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:50:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-18 17:50:56,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 17:50:56,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:56,377 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:56,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 17:50:56,378 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:56,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:56,378 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-18 17:50:56,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:56,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242016515] [2020-08-18 17:50:56,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:56,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 17:50:56,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 17:50:56,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 17:50:56,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:56,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242016515] [2020-08-18 17:50:56,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:56,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:50:56,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039398580] [2020-08-18 17:50:56,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:50:56,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:56,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:50:56,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:50:56,568 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-18 17:50:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:56,705 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-18 17:50:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:50:56,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-18 17:50:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:56,707 INFO L225 Difference]: With dead ends: 244 [2020-08-18 17:50:56,707 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 17:50:56,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:50:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 17:50:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-18 17:50:56,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 17:50:56,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-18 17:50:56,720 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-18 17:50:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:56,720 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-18 17:50:56,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:50:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-18 17:50:56,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 17:50:56,722 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:56,722 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:56,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 17:50:56,722 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:56,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-18 17:50:56,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:56,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347042075] [2020-08-18 17:50:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:56,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 17:50:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:50:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 17:50:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:56,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347042075] [2020-08-18 17:50:56,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:56,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:50:56,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836715759] [2020-08-18 17:50:56,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:50:56,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:56,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:50:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:50:56,920 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-18 17:50:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:57,152 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-18 17:50:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:50:57,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-18 17:50:57,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:57,155 INFO L225 Difference]: With dead ends: 226 [2020-08-18 17:50:57,155 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 17:50:57,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:50:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 17:50:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-18 17:50:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 17:50:57,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-18 17:50:57,173 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-18 17:50:57,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:57,174 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-18 17:50:57,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:50:57,174 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-18 17:50:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 17:50:57,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:57,175 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:57,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 17:50:57,176 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:57,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:57,176 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-18 17:50:57,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:57,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481778478] [2020-08-18 17:50:57,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:57,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 17:50:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 17:50:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 17:50:57,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:57,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481778478] [2020-08-18 17:50:57,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:57,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 17:50:57,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425379506] [2020-08-18 17:50:57,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 17:50:57,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:57,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 17:50:57,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:50:57,333 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-18 17:50:57,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:57,492 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-18 17:50:57,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 17:50:57,493 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-18 17:50:57,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:57,495 INFO L225 Difference]: With dead ends: 261 [2020-08-18 17:50:57,495 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 17:50:57,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:50:57,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 17:50:57,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-18 17:50:57,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 17:50:57,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-18 17:50:57,508 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-18 17:50:57,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:57,509 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-18 17:50:57,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 17:50:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-18 17:50:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 17:50:57,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:57,510 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:57,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 17:50:57,511 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:57,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:57,511 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-18 17:50:57,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:57,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381903934] [2020-08-18 17:50:57,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:57,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 17:50:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 17:50:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 17:50:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:57,752 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:57,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381903934] [2020-08-18 17:50:57,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:57,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:50:57,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686521123] [2020-08-18 17:50:57,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:50:57,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:57,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:50:57,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:50:57,755 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-18 17:50:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:58,134 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-18 17:50:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:50:58,135 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-18 17:50:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:58,137 INFO L225 Difference]: With dead ends: 238 [2020-08-18 17:50:58,137 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 17:50:58,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:50:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 17:50:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-18 17:50:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 17:50:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-18 17:50:58,155 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-18 17:50:58,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:58,155 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-18 17:50:58,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:50:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-18 17:50:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 17:50:58,157 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:58,158 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:58,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 17:50:58,158 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:58,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-18 17:50:58,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:58,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227593629] [2020-08-18 17:50:58,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 17:50:58,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 17:50:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:50:58,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:58,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227593629] [2020-08-18 17:50:58,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:58,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:50:58,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739855915] [2020-08-18 17:50:58,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:50:58,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:50:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:50:58,363 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-18 17:50:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:58,525 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-18 17:50:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 17:50:58,527 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-18 17:50:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:58,529 INFO L225 Difference]: With dead ends: 278 [2020-08-18 17:50:58,529 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 17:50:58,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:50:58,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 17:50:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-18 17:50:58,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 17:50:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-18 17:50:58,544 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-18 17:50:58,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:58,545 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-18 17:50:58,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:50:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-18 17:50:58,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 17:50:58,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:58,548 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:58,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 17:50:58,548 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:58,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:58,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-18 17:50:58,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:58,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115077536] [2020-08-18 17:50:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:58,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 17:50:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 17:50:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 17:50:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:58,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115077536] [2020-08-18 17:50:58,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:58,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:50:58,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411743188] [2020-08-18 17:50:58,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:50:58,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:58,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:50:58,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:50:58,852 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-18 17:50:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:59,142 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-18 17:50:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:50:59,143 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-18 17:50:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:59,145 INFO L225 Difference]: With dead ends: 250 [2020-08-18 17:50:59,145 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 17:50:59,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:50:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 17:50:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-18 17:50:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 17:50:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-18 17:50:59,164 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-18 17:50:59,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:59,164 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-18 17:50:59,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:50:59,164 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-18 17:50:59,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 17:50:59,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:59,166 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:59,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 17:50:59,166 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:59,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:59,167 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-18 17:50:59,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:59,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724386517] [2020-08-18 17:50:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 17:50:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 17:50:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 17:50:59,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,364 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:59,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724386517] [2020-08-18 17:50:59,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:59,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 17:50:59,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375261640] [2020-08-18 17:50:59,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 17:50:59,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:59,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 17:50:59,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:50:59,366 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-18 17:50:59,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:50:59,521 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-18 17:50:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 17:50:59,524 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-18 17:50:59,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:50:59,525 INFO L225 Difference]: With dead ends: 295 [2020-08-18 17:50:59,525 INFO L226 Difference]: Without dead ends: 208 [2020-08-18 17:50:59,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:50:59,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-18 17:50:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-18 17:50:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 17:50:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-18 17:50:59,542 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-18 17:50:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:50:59,542 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-18 17:50:59,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 17:50:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-18 17:50:59,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 17:50:59,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:50:59,544 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:50:59,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 17:50:59,544 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:50:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:50:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-18 17:50:59,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:50:59,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059931100] [2020-08-18 17:50:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:50:59,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:50:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:50:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:50:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 17:50:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 17:50:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 17:50:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:50:59,852 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:50:59,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059931100] [2020-08-18 17:50:59,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:50:59,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:50:59,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416086581] [2020-08-18 17:50:59,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:50:59,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:50:59,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:50:59,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:50:59,856 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-18 17:51:00,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:00,227 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-18 17:51:00,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:51:00,228 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-18 17:51:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:00,230 INFO L225 Difference]: With dead ends: 262 [2020-08-18 17:51:00,230 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 17:51:00,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:51:00,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 17:51:00,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-18 17:51:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 17:51:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-18 17:51:00,246 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-18 17:51:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:00,246 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-18 17:51:00,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:51:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-18 17:51:00,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 17:51:00,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:00,248 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:00,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 17:51:00,250 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:00,250 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-18 17:51:00,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:00,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727808065] [2020-08-18 17:51:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 17:51:00,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 17:51:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 17:51:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:00,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727808065] [2020-08-18 17:51:00,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:00,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 17:51:00,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635705187] [2020-08-18 17:51:00,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 17:51:00,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 17:51:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:51:00,468 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-18 17:51:00,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:00,638 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-18 17:51:00,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 17:51:00,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-18 17:51:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:00,641 INFO L225 Difference]: With dead ends: 312 [2020-08-18 17:51:00,641 INFO L226 Difference]: Without dead ends: 222 [2020-08-18 17:51:00,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:51:00,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-18 17:51:00,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-18 17:51:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 17:51:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-18 17:51:00,656 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-18 17:51:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:00,656 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-18 17:51:00,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 17:51:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-18 17:51:00,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 17:51:00,658 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:00,658 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:00,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 17:51:00,658 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:00,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:00,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-18 17:51:00,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:00,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503495795] [2020-08-18 17:51:00,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 17:51:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:51:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 17:51:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:01,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503495795] [2020-08-18 17:51:01,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:01,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:51:01,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362786151] [2020-08-18 17:51:01,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:51:01,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:01,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:51:01,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:51:01,044 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-18 17:51:01,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:01,444 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-18 17:51:01,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:51:01,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-18 17:51:01,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:01,447 INFO L225 Difference]: With dead ends: 274 [2020-08-18 17:51:01,447 INFO L226 Difference]: Without dead ends: 187 [2020-08-18 17:51:01,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:51:01,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-18 17:51:01,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-18 17:51:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 17:51:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-18 17:51:01,461 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-18 17:51:01,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:01,461 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-18 17:51:01,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:51:01,461 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-18 17:51:01,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 17:51:01,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:01,463 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:01,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 17:51:01,464 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:01,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:01,464 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-18 17:51:01,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:01,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202226926] [2020-08-18 17:51:01,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:01,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 17:51:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 17:51:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 17:51:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,694 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:01,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202226926] [2020-08-18 17:51:01,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:01,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 17:51:01,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317692509] [2020-08-18 17:51:01,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 17:51:01,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:01,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 17:51:01,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 17:51:01,697 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-18 17:51:01,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:01,864 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-18 17:51:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 17:51:01,864 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-18 17:51:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:01,866 INFO L225 Difference]: With dead ends: 329 [2020-08-18 17:51:01,866 INFO L226 Difference]: Without dead ends: 236 [2020-08-18 17:51:01,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:51:01,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-18 17:51:01,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-18 17:51:01,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 17:51:01,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-18 17:51:01,881 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-18 17:51:01,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:01,882 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-18 17:51:01,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 17:51:01,882 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-18 17:51:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 17:51:01,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:01,883 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:01,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 17:51:01,886 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:01,887 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-18 17:51:01,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:01,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537021320] [2020-08-18 17:51:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:01,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:01,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:01,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 17:51:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 17:51:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 17:51:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:02,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537021320] [2020-08-18 17:51:02,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:02,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 17:51:02,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529811722] [2020-08-18 17:51:02,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 17:51:02,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:02,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 17:51:02,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:51:02,254 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-18 17:51:02,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:02,669 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-18 17:51:02,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:51:02,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-18 17:51:02,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:02,671 INFO L225 Difference]: With dead ends: 286 [2020-08-18 17:51:02,671 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 17:51:02,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:51:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 17:51:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-18 17:51:02,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 17:51:02,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-18 17:51:02,684 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-18 17:51:02,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:02,685 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-18 17:51:02,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 17:51:02,685 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-18 17:51:02,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 17:51:02,686 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:02,687 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:02,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 17:51:02,687 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-18 17:51:02,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:02,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519555342] [2020-08-18 17:51:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:02,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:02,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 17:51:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 17:51:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 17:51:02,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:02,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519555342] [2020-08-18 17:51:02,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:02,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 17:51:02,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092581669] [2020-08-18 17:51:02,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 17:51:02,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:02,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 17:51:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:51:02,939 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-18 17:51:03,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:03,160 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-18 17:51:03,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 17:51:03,161 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 17:51:03,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:03,163 INFO L225 Difference]: With dead ends: 346 [2020-08-18 17:51:03,163 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 17:51:03,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:51:03,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 17:51:03,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-18 17:51:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 17:51:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-18 17:51:03,180 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-18 17:51:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:03,181 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-18 17:51:03,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 17:51:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-18 17:51:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 17:51:03,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:03,182 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:03,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 17:51:03,183 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-18 17:51:03,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:03,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990613554] [2020-08-18 17:51:03,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:03,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 17:51:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 17:51:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:51:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 17:51:03,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990613554] [2020-08-18 17:51:03,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:03,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 17:51:03,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194778814] [2020-08-18 17:51:03,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 17:51:03,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 17:51:03,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:51:03,256 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-18 17:51:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:03,269 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-18 17:51:03,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 17:51:03,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-18 17:51:03,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:03,271 INFO L225 Difference]: With dead ends: 160 [2020-08-18 17:51:03,271 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 17:51:03,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 17:51:03,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 17:51:03,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 17:51:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 17:51:03,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-18 17:51:03,282 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-18 17:51:03,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:03,283 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-18 17:51:03,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 17:51:03,283 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-18 17:51:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 17:51:03,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:03,285 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:03,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 17:51:03,285 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:03,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:03,285 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-18 17:51:03,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:03,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1374762347] [2020-08-18 17:51:03,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:03,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 17:51:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 17:51:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 17:51:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 17:51:03,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1374762347] [2020-08-18 17:51:03,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:03,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:51:03,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494369316] [2020-08-18 17:51:03,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:51:03,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:03,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:51:03,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:51:03,346 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-18 17:51:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:03,372 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-18 17:51:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:51:03,373 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-18 17:51:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:03,374 INFO L225 Difference]: With dead ends: 161 [2020-08-18 17:51:03,374 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 17:51:03,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:51:03,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 17:51:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 17:51:03,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 17:51:03,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-18 17:51:03,386 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-18 17:51:03,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:03,386 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-18 17:51:03,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:51:03,386 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-18 17:51:03,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 17:51:03,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:03,388 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:03,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 17:51:03,388 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-18 17:51:03,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:03,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295026820] [2020-08-18 17:51:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:03,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:03,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 17:51:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 17:51:03,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 17:51:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:03,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295026820] [2020-08-18 17:51:03,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:03,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:51:03,742 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544534142] [2020-08-18 17:51:03,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:51:03,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:03,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:51:03,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:51:03,743 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-18 17:51:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:04,305 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-18 17:51:04,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:51:04,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-18 17:51:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:04,308 INFO L225 Difference]: With dead ends: 298 [2020-08-18 17:51:04,308 INFO L226 Difference]: Without dead ends: 205 [2020-08-18 17:51:04,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:51:04,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-18 17:51:04,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-18 17:51:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 17:51:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-18 17:51:04,322 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-18 17:51:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:04,322 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-18 17:51:04,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:51:04,322 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-18 17:51:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 17:51:04,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:04,324 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:04,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 17:51:04,324 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-18 17:51:04,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:04,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105509312] [2020-08-18 17:51:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:04,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 17:51:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-18 17:51:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 17:51:04,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:04,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105509312] [2020-08-18 17:51:04,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:04,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 17:51:04,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902616992] [2020-08-18 17:51:04,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 17:51:04,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:04,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 17:51:04,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 17:51:04,606 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-18 17:51:04,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:04,864 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-18 17:51:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 17:51:04,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-18 17:51:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:04,867 INFO L225 Difference]: With dead ends: 363 [2020-08-18 17:51:04,868 INFO L226 Difference]: Without dead ends: 264 [2020-08-18 17:51:04,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:51:04,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-18 17:51:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-18 17:51:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 17:51:04,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-18 17:51:04,887 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-18 17:51:04,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:04,887 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-18 17:51:04,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 17:51:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-18 17:51:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 17:51:04,889 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:04,889 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:04,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 17:51:04,889 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:04,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-18 17:51:04,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:04,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949868207] [2020-08-18 17:51:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:04,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 17:51:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 17:51:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:51:05,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,275 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:05,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949868207] [2020-08-18 17:51:05,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:05,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 17:51:05,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797956305] [2020-08-18 17:51:05,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 17:51:05,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:05,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 17:51:05,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:51:05,277 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-18 17:51:05,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:05,896 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-18 17:51:05,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:51:05,897 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-18 17:51:05,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:05,899 INFO L225 Difference]: With dead ends: 310 [2020-08-18 17:51:05,899 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 17:51:05,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:51:05,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 17:51:05,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-18 17:51:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 17:51:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-18 17:51:05,915 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-18 17:51:05,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:05,915 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-18 17:51:05,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 17:51:05,915 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-18 17:51:05,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-18 17:51:05,916 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:05,916 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:05,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 17:51:05,917 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:05,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:05,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-18 17:51:05,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:05,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719854704] [2020-08-18 17:51:05,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:05,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 17:51:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 17:51:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 17:51:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:06,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719854704] [2020-08-18 17:51:06,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:06,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 17:51:06,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29012694] [2020-08-18 17:51:06,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 17:51:06,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 17:51:06,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 17:51:06,214 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-18 17:51:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:06,403 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-18 17:51:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 17:51:06,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-18 17:51:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:06,406 INFO L225 Difference]: With dead ends: 380 [2020-08-18 17:51:06,406 INFO L226 Difference]: Without dead ends: 278 [2020-08-18 17:51:06,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:51:06,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-18 17:51:06,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-18 17:51:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-18 17:51:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-18 17:51:06,424 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-18 17:51:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:06,424 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-18 17:51:06,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 17:51:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-18 17:51:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 17:51:06,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:06,426 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:06,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 17:51:06,426 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:06,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-18 17:51:06,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:06,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120906402] [2020-08-18 17:51:06,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:06,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 17:51:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 17:51:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 17:51:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:06,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120906402] [2020-08-18 17:51:06,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:06,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:51:06,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041123582] [2020-08-18 17:51:06,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:51:06,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:06,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:51:06,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:51:06,859 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-18 17:51:07,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:07,571 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-18 17:51:07,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:51:07,573 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 17:51:07,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:07,575 INFO L225 Difference]: With dead ends: 322 [2020-08-18 17:51:07,575 INFO L226 Difference]: Without dead ends: 223 [2020-08-18 17:51:07,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:51:07,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-18 17:51:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-18 17:51:07,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-18 17:51:07,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-18 17:51:07,593 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-18 17:51:07,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:07,594 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-18 17:51:07,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:51:07,594 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-18 17:51:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 17:51:07,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:07,596 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:07,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 17:51:07,597 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:07,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:07,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-18 17:51:07,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:07,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86405796] [2020-08-18 17:51:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:07,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 17:51:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 17:51:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:07,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 17:51:07,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:08,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86405796] [2020-08-18 17:51:08,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:08,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 17:51:08,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792948980] [2020-08-18 17:51:08,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 17:51:08,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:08,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 17:51:08,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 17:51:08,003 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-18 17:51:08,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:08,348 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-18 17:51:08,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 17:51:08,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-18 17:51:08,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:08,352 INFO L225 Difference]: With dead ends: 397 [2020-08-18 17:51:08,353 INFO L226 Difference]: Without dead ends: 292 [2020-08-18 17:51:08,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:51:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-18 17:51:08,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-18 17:51:08,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 17:51:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-18 17:51:08,380 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-18 17:51:08,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:08,381 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-18 17:51:08,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 17:51:08,381 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-18 17:51:08,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 17:51:08,382 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:08,382 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:08,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 17:51:08,383 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:08,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-18 17:51:08,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:08,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545305922] [2020-08-18 17:51:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:08,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 17:51:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 17:51:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 17:51:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:08,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545305922] [2020-08-18 17:51:08,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:08,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 17:51:08,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236886414] [2020-08-18 17:51:08,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 17:51:08,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 17:51:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:51:08,868 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-18 17:51:09,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:09,597 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-18 17:51:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:51:09,601 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-18 17:51:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:09,603 INFO L225 Difference]: With dead ends: 334 [2020-08-18 17:51:09,603 INFO L226 Difference]: Without dead ends: 232 [2020-08-18 17:51:09,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:51:09,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-18 17:51:09,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-18 17:51:09,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 17:51:09,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-18 17:51:09,618 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-18 17:51:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:09,618 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-18 17:51:09,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 17:51:09,618 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-18 17:51:09,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 17:51:09,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:09,620 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:09,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 17:51:09,620 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:09,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-18 17:51:09,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:09,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820994140] [2020-08-18 17:51:09,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:09,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:09,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:09,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:09,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:09,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 17:51:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 17:51:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 17:51:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:10,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820994140] [2020-08-18 17:51:10,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:10,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 17:51:10,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106411973] [2020-08-18 17:51:10,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 17:51:10,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:10,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 17:51:10,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 17:51:10,026 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-18 17:51:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:10,342 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-18 17:51:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 17:51:10,343 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-18 17:51:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:10,345 INFO L225 Difference]: With dead ends: 414 [2020-08-18 17:51:10,346 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 17:51:10,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:51:10,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 17:51:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-18 17:51:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-18 17:51:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-18 17:51:10,362 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-18 17:51:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:10,362 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-18 17:51:10,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 17:51:10,362 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-18 17:51:10,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 17:51:10,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:10,364 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:10,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 17:51:10,364 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:10,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:10,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-18 17:51:10,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:10,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546275945] [2020-08-18 17:51:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 17:51:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 17:51:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 17:51:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:10,885 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:10,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546275945] [2020-08-18 17:51:10,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:10,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:51:10,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570055631] [2020-08-18 17:51:10,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:51:10,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:51:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:51:10,887 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-18 17:51:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:11,635 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-18 17:51:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:51:11,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-18 17:51:11,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:11,641 INFO L225 Difference]: With dead ends: 346 [2020-08-18 17:51:11,641 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 17:51:11,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:51:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 17:51:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-18 17:51:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 17:51:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-18 17:51:11,658 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-18 17:51:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:11,658 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-18 17:51:11,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:51:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-18 17:51:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 17:51:11,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:11,665 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:11,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 17:51:11,666 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-18 17:51:11,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:11,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465157130] [2020-08-18 17:51:11,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:11,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:11,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:11,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 17:51:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 17:51:12,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 17:51:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:12,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465157130] [2020-08-18 17:51:12,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:12,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 17:51:12,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710877995] [2020-08-18 17:51:12,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 17:51:12,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:12,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 17:51:12,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 17:51:12,067 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-18 17:51:12,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:12,378 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-18 17:51:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 17:51:12,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-18 17:51:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:12,381 INFO L225 Difference]: With dead ends: 431 [2020-08-18 17:51:12,381 INFO L226 Difference]: Without dead ends: 320 [2020-08-18 17:51:12,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:51:12,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-18 17:51:12,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-18 17:51:12,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-18 17:51:12,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-18 17:51:12,399 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-18 17:51:12,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:12,399 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-18 17:51:12,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 17:51:12,399 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-18 17:51:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 17:51:12,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:12,401 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:12,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 17:51:12,401 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:12,402 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-18 17:51:12,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:12,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721860470] [2020-08-18 17:51:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 17:51:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 17:51:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 17:51:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:12,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721860470] [2020-08-18 17:51:12,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:12,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 17:51:12,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992137047] [2020-08-18 17:51:12,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 17:51:12,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:12,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 17:51:12,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:51:12,993 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-18 17:51:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:13,813 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-18 17:51:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 17:51:13,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-18 17:51:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:13,816 INFO L225 Difference]: With dead ends: 358 [2020-08-18 17:51:13,816 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 17:51:13,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:51:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 17:51:13,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-18 17:51:13,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-18 17:51:13,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-18 17:51:13,832 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-18 17:51:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:13,832 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-18 17:51:13,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 17:51:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-18 17:51:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 17:51:13,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:13,834 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:13,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 17:51:13,834 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:13,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:13,834 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-18 17:51:13,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:13,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191425171] [2020-08-18 17:51:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:13,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:13,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:13,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 17:51:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 17:51:14,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,249 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:14,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191425171] [2020-08-18 17:51:14,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:14,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 17:51:14,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511235176] [2020-08-18 17:51:14,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 17:51:14,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:14,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 17:51:14,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 17:51:14,251 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-18 17:51:14,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:14,509 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-18 17:51:14,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 17:51:14,517 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-18 17:51:14,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:14,521 INFO L225 Difference]: With dead ends: 448 [2020-08-18 17:51:14,521 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 17:51:14,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:51:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 17:51:14,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-18 17:51:14,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 17:51:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-18 17:51:14,540 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-18 17:51:14,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:14,540 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-18 17:51:14,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 17:51:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-18 17:51:14,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 17:51:14,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:14,542 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:14,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 17:51:14,542 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:14,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:14,542 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-18 17:51:14,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:14,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694933112] [2020-08-18 17:51:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:14,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:15,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 17:51:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:15,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:51:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 17:51:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:15,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694933112] [2020-08-18 17:51:15,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:15,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 17:51:15,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842146397] [2020-08-18 17:51:15,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 17:51:15,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:15,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 17:51:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:51:15,130 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-18 17:51:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:16,058 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-18 17:51:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:51:16,059 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-18 17:51:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:16,062 INFO L225 Difference]: With dead ends: 370 [2020-08-18 17:51:16,062 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 17:51:16,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:51:16,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 17:51:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-18 17:51:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-18 17:51:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-18 17:51:16,092 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-18 17:51:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:16,092 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-18 17:51:16,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 17:51:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-18 17:51:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 17:51:16,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:16,095 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:16,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 17:51:16,095 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:16,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-18 17:51:16,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:16,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790293750] [2020-08-18 17:51:16,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:16,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 17:51:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 17:51:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 17:51:16,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:16,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790293750] [2020-08-18 17:51:16,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:16,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 17:51:16,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184180902] [2020-08-18 17:51:16,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 17:51:16,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 17:51:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 17:51:16,530 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-18 17:51:16,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:16,863 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-18 17:51:16,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 17:51:16,865 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-18 17:51:16,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:16,868 INFO L225 Difference]: With dead ends: 465 [2020-08-18 17:51:16,868 INFO L226 Difference]: Without dead ends: 348 [2020-08-18 17:51:16,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:51:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-18 17:51:16,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-18 17:51:16,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-18 17:51:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-18 17:51:16,886 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-18 17:51:16,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:16,886 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-18 17:51:16,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 17:51:16,886 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-18 17:51:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-18 17:51:16,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:16,888 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:16,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 17:51:16,888 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:16,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:16,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-18 17:51:16,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:16,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698168287] [2020-08-18 17:51:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:16,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:17,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 17:51:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:17,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 17:51:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:17,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 17:51:17,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:17,509 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:17,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698168287] [2020-08-18 17:51:17,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:17,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 17:51:17,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871680624] [2020-08-18 17:51:17,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 17:51:17,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:17,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 17:51:17,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:51:17,513 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-18 17:51:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:18,626 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-18 17:51:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 17:51:18,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-18 17:51:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:18,629 INFO L225 Difference]: With dead ends: 382 [2020-08-18 17:51:18,630 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 17:51:18,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:51:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 17:51:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-18 17:51:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-18 17:51:18,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-18 17:51:18,647 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-18 17:51:18,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:18,647 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-18 17:51:18,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 17:51:18,648 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-18 17:51:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-18 17:51:18,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:18,649 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:18,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 17:51:18,650 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:18,650 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-18 17:51:18,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:18,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279012243] [2020-08-18 17:51:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:18,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:18,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:18,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 17:51:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 17:51:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 17:51:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:19,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279012243] [2020-08-18 17:51:19,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:19,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 17:51:19,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885424648] [2020-08-18 17:51:19,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 17:51:19,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:19,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 17:51:19,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 17:51:19,098 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-18 17:51:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:19,453 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-18 17:51:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 17:51:19,454 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-18 17:51:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:19,457 INFO L225 Difference]: With dead ends: 482 [2020-08-18 17:51:19,457 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 17:51:19,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:51:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 17:51:19,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-18 17:51:19,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-18 17:51:19,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-18 17:51:19,477 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-18 17:51:19,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:19,477 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-18 17:51:19,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 17:51:19,477 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-18 17:51:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 17:51:19,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:19,479 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:19,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 17:51:19,479 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:19,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:19,479 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-18 17:51:19,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:19,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509109454] [2020-08-18 17:51:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:20,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 17:51:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:20,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:51:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:20,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 17:51:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:20,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509109454] [2020-08-18 17:51:20,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:20,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 17:51:20,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718580656] [2020-08-18 17:51:20,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 17:51:20,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 17:51:20,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:51:20,123 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-18 17:51:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:21,286 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-18 17:51:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 17:51:21,286 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-18 17:51:21,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:21,288 INFO L225 Difference]: With dead ends: 394 [2020-08-18 17:51:21,288 INFO L226 Difference]: Without dead ends: 277 [2020-08-18 17:51:21,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:51:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-18 17:51:21,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-18 17:51:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-18 17:51:21,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-18 17:51:21,307 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-18 17:51:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:21,307 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-18 17:51:21,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 17:51:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-18 17:51:21,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 17:51:21,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:21,309 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:21,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 17:51:21,309 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:21,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:21,310 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-18 17:51:21,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:21,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219067940] [2020-08-18 17:51:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 17:51:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 17:51:21,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 17:51:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:21,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219067940] [2020-08-18 17:51:21,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:21,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 17:51:21,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700022699] [2020-08-18 17:51:21,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 17:51:21,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:21,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 17:51:21,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 17:51:21,779 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-18 17:51:22,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:22,109 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-18 17:51:22,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 17:51:22,109 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-18 17:51:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:22,116 INFO L225 Difference]: With dead ends: 499 [2020-08-18 17:51:22,116 INFO L226 Difference]: Without dead ends: 376 [2020-08-18 17:51:22,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:51:22,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-18 17:51:22,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-18 17:51:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-18 17:51:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-18 17:51:22,137 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-18 17:51:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:22,137 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-18 17:51:22,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 17:51:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-18 17:51:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 17:51:22,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:22,139 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:22,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 17:51:22,139 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:22,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:22,139 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-18 17:51:22,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:22,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904480611] [2020-08-18 17:51:22,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:22,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 17:51:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 17:51:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 17:51:22,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:22,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904480611] [2020-08-18 17:51:22,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:22,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 17:51:22,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587386944] [2020-08-18 17:51:22,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 17:51:22,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:22,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 17:51:22,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:51:22,864 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-18 17:51:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:24,182 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-18 17:51:24,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 17:51:24,185 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-18 17:51:24,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:24,187 INFO L225 Difference]: With dead ends: 406 [2020-08-18 17:51:24,187 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 17:51:24,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:51:24,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 17:51:24,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-18 17:51:24,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 17:51:24,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-18 17:51:24,208 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-18 17:51:24,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:24,208 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-18 17:51:24,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 17:51:24,208 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-18 17:51:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-18 17:51:24,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:24,210 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:24,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 17:51:24,210 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:24,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-18 17:51:24,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:24,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291742835] [2020-08-18 17:51:24,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 17:51:24,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 17:51:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 17:51:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:24,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291742835] [2020-08-18 17:51:24,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:24,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 17:51:24,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714035895] [2020-08-18 17:51:24,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 17:51:24,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 17:51:24,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 17:51:24,794 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-18 17:51:25,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:25,123 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-18 17:51:25,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 17:51:25,124 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-18 17:51:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:25,126 INFO L225 Difference]: With dead ends: 516 [2020-08-18 17:51:25,126 INFO L226 Difference]: Without dead ends: 390 [2020-08-18 17:51:25,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:51:25,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-18 17:51:25,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-18 17:51:25,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 17:51:25,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-18 17:51:25,147 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-18 17:51:25,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:25,147 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-18 17:51:25,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 17:51:25,148 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-18 17:51:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 17:51:25,149 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:25,149 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:25,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 17:51:25,149 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:25,150 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-18 17:51:25,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:25,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981027092] [2020-08-18 17:51:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 17:51:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 17:51:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 17:51:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:25,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981027092] [2020-08-18 17:51:25,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:25,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 17:51:25,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53269336] [2020-08-18 17:51:25,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 17:51:25,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:25,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 17:51:25,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:51:25,920 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-18 17:51:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:27,379 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-18 17:51:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 17:51:27,380 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-18 17:51:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:27,381 INFO L225 Difference]: With dead ends: 418 [2020-08-18 17:51:27,381 INFO L226 Difference]: Without dead ends: 295 [2020-08-18 17:51:27,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-18 17:51:27,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-18 17:51:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-18 17:51:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-18 17:51:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-18 17:51:27,401 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-18 17:51:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:27,401 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-18 17:51:27,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 17:51:27,401 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-18 17:51:27,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 17:51:27,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:27,402 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:27,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 17:51:27,403 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:27,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-18 17:51:27,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:27,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300589408] [2020-08-18 17:51:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:27,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 17:51:27,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 17:51:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-18 17:51:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 17:51:27,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300589408] [2020-08-18 17:51:27,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:27,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 17:51:27,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199992954] [2020-08-18 17:51:27,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 17:51:27,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 17:51:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 17:51:27,990 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-18 17:51:28,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:28,428 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-18 17:51:28,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 17:51:28,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-18 17:51:28,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:28,431 INFO L225 Difference]: With dead ends: 533 [2020-08-18 17:51:28,431 INFO L226 Difference]: Without dead ends: 404 [2020-08-18 17:51:28,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-18 17:51:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-18 17:51:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-18 17:51:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-18 17:51:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-18 17:51:28,467 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-18 17:51:28,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:28,467 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-18 17:51:28,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 17:51:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-18 17:51:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 17:51:28,469 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:28,469 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:28,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 17:51:28,470 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:28,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:28,470 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-18 17:51:28,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:28,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374200183] [2020-08-18 17:51:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 17:51:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 17:51:28,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374200183] [2020-08-18 17:51:28,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:28,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 17:51:28,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560084636] [2020-08-18 17:51:28,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:51:28,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:28,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:51:28,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:51:28,688 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-18 17:51:29,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:29,058 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-18 17:51:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:51:29,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 17:51:29,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:29,062 INFO L225 Difference]: With dead ends: 271 [2020-08-18 17:51:29,062 INFO L226 Difference]: Without dead ends: 261 [2020-08-18 17:51:29,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:51:29,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-18 17:51:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-18 17:51:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-18 17:51:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-18 17:51:29,088 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-18 17:51:29,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:29,088 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-18 17:51:29,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:51:29,089 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-18 17:51:29,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 17:51:29,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:29,091 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:29,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 17:51:29,091 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:29,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:29,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-18 17:51:29,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:29,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855720361] [2020-08-18 17:51:29,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 17:51:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,363 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 17:51:29,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855720361] [2020-08-18 17:51:29,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:29,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 17:51:29,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865961752] [2020-08-18 17:51:29,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 17:51:29,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:29,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 17:51:29,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:51:29,365 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-18 17:51:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:29,671 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-18 17:51:29,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:51:29,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 17:51:29,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:29,675 INFO L225 Difference]: With dead ends: 285 [2020-08-18 17:51:29,675 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 17:51:29,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-18 17:51:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 17:51:29,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-18 17:51:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 17:51:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-18 17:51:29,720 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-18 17:51:29,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:29,720 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-18 17:51:29,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 17:51:29,721 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-18 17:51:29,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 17:51:29,723 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:29,723 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:29,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-18 17:51:29,723 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:29,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:29,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-18 17:51:29,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:29,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865834904] [2020-08-18 17:51:29,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:29,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:29,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 17:51:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-18 17:51:29,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865834904] [2020-08-18 17:51:29,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:29,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 17:51:29,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699422637] [2020-08-18 17:51:29,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 17:51:29,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:29,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 17:51:29,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 17:51:29,852 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-18 17:51:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:29,913 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-18 17:51:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 17:51:29,914 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-18 17:51:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:29,916 INFO L225 Difference]: With dead ends: 271 [2020-08-18 17:51:29,916 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 17:51:29,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:29,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 17:51:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-18 17:51:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 17:51:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-18 17:51:29,956 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-18 17:51:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:29,956 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-18 17:51:29,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 17:51:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-18 17:51:29,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 17:51:29,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:29,959 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:29,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-18 17:51:29,959 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:29,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-18 17:51:29,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:29,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705500239] [2020-08-18 17:51:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:29,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:30,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 17:51:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,273 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 17:51:30,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705500239] [2020-08-18 17:51:30,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:30,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 17:51:30,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167328271] [2020-08-18 17:51:30,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 17:51:30,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:30,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 17:51:30,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:51:30,275 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-18 17:51:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:30,525 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-18 17:51:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:51:30,527 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-18 17:51:30,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:30,529 INFO L225 Difference]: With dead ends: 284 [2020-08-18 17:51:30,529 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 17:51:30,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-18 17:51:30,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 17:51:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-18 17:51:30,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-18 17:51:30,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-18 17:51:30,582 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-18 17:51:30,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:30,582 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-18 17:51:30,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 17:51:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-18 17:51:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 17:51:30,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:30,585 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:30,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-18 17:51:30,585 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:30,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:30,586 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-18 17:51:30,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:30,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492874996] [2020-08-18 17:51:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:30,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 17:51:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 17:51:30,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492874996] [2020-08-18 17:51:30,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:30,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:51:30,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643371619] [2020-08-18 17:51:30,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:51:30,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:30,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:51:30,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:30,739 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-18 17:51:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:30,873 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-18 17:51:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:51:30,874 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-18 17:51:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:30,876 INFO L225 Difference]: With dead ends: 303 [2020-08-18 17:51:30,876 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 17:51:30,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:51:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 17:51:30,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-18 17:51:30,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-18 17:51:30,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-18 17:51:30,910 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-18 17:51:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:30,910 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-18 17:51:30,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:51:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-18 17:51:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 17:51:30,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:30,912 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:30,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-18 17:51:30,913 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:30,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:30,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-18 17:51:30,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:30,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521023193] [2020-08-18 17:51:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:30,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 17:51:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 17:51:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 17:51:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 17:51:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 17:51:31,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521023193] [2020-08-18 17:51:31,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:31,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 17:51:31,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295976542] [2020-08-18 17:51:31,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 17:51:31,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:31,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 17:51:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:51:31,027 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-18 17:51:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:31,124 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-18 17:51:31,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 17:51:31,124 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-18 17:51:31,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:31,126 INFO L225 Difference]: With dead ends: 409 [2020-08-18 17:51:31,126 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 17:51:31,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 17:51:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 17:51:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-18 17:51:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 17:51:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 17:51:31,149 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-18 17:51:31,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:31,150 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 17:51:31,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 17:51:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 17:51:31,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 17:51:31,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:31,151 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:31,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-18 17:51:31,152 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:31,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:31,152 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-18 17:51:31,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:31,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245781915] [2020-08-18 17:51:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:31,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:31,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:31,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 17:51:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-18 17:51:31,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245781915] [2020-08-18 17:51:31,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:51:31,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 17:51:31,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528563131] [2020-08-18 17:51:31,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:51:31,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:31,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:51:31,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:31,324 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-18 17:51:31,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:31,442 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-18 17:51:31,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 17:51:31,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-18 17:51:31,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:31,444 INFO L225 Difference]: With dead ends: 158 [2020-08-18 17:51:31,444 INFO L226 Difference]: Without dead ends: 143 [2020-08-18 17:51:31,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-18 17:51:31,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-18 17:51:31,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-18 17:51:31,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 17:51:31,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 17:51:31,462 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-18 17:51:31,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:31,462 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 17:51:31,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:51:31,462 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 17:51:31,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 17:51:31,463 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:31,464 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:31,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-18 17:51:31,464 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:31,464 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-18 17:51:31,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:31,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402568234] [2020-08-18 17:51:31,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 17:51:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-18 17:51:31,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402568234] [2020-08-18 17:51:31,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:31,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:51:31,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038234803] [2020-08-18 17:51:31,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:51:31,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:31,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:51:31,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:51:31,601 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-18 17:51:31,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:31,702 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 17:51:31,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 17:51:31,703 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 17:51:31,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:31,704 INFO L225 Difference]: With dead ends: 176 [2020-08-18 17:51:31,704 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 17:51:31,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-18 17:51:31,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 17:51:31,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-18 17:51:31,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-18 17:51:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-18 17:51:31,726 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-18 17:51:31,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:31,726 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-18 17:51:31,726 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:51:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-18 17:51:31,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 17:51:31,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:31,727 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:31,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-18 17:51:31,728 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:31,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:31,728 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-18 17:51:31,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:31,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139520261] [2020-08-18 17:51:31,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:31,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:31,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 17:51:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 17:51:31,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-18 17:51:31,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139520261] [2020-08-18 17:51:31,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:31,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:51:31,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996797341] [2020-08-18 17:51:31,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:51:31,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:31,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:51:31,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:51:31,932 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-18 17:51:32,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:32,109 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-18 17:51:32,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 17:51:32,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 17:51:32,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:32,111 INFO L225 Difference]: With dead ends: 170 [2020-08-18 17:51:32,112 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 17:51:32,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 17:51:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 17:51:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-18 17:51:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 17:51:32,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-18 17:51:32,131 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-18 17:51:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:32,131 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-18 17:51:32,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:51:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-18 17:51:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 17:51:32,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:32,133 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:32,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-18 17:51:32,133 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-18 17:51:32,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:32,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320921505] [2020-08-18 17:51:32,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:32,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 17:51:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:51:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,278 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 17:51:32,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320921505] [2020-08-18 17:51:32,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:32,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 17:51:32,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254926987] [2020-08-18 17:51:32,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 17:51:32,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:32,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 17:51:32,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 17:51:32,281 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-18 17:51:32,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:32,382 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-18 17:51:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 17:51:32,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-18 17:51:32,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:32,383 INFO L225 Difference]: With dead ends: 173 [2020-08-18 17:51:32,384 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 17:51:32,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:51:32,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 17:51:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-18 17:51:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 17:51:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-18 17:51:32,403 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-18 17:51:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:32,404 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-18 17:51:32,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 17:51:32,404 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-18 17:51:32,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 17:51:32,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:51:32,406 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:51:32,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-18 17:51:32,406 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:51:32,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:51:32,406 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-18 17:51:32,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:51:32,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907662219] [2020-08-18 17:51:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:51:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:51:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 17:51:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 17:51:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 17:51:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 17:51:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 17:51:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:51:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 17:51:32,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907662219] [2020-08-18 17:51:32,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 17:51:32,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 17:51:32,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893639354] [2020-08-18 17:51:32,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 17:51:32,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:51:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 17:51:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 17:51:32,638 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-18 17:51:32,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:51:32,783 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-18 17:51:32,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 17:51:32,783 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-18 17:51:32,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:51:32,783 INFO L225 Difference]: With dead ends: 157 [2020-08-18 17:51:32,783 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:51:32,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-18 17:51:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:51:32,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:51:32,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:51:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:51:32,785 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-18 17:51:32,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:51:32,786 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:51:32,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 17:51:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:51:32,786 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:51:32,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-18 17:51:32,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:51:38,509 WARN L193 SmtUtils]: Spent 5.70 s on a formula simplification. DAG size of input: 558 DAG size of output: 226 [2020-08-18 17:51:39,963 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 393 DAG size of output: 20 [2020-08-18 17:51:40,240 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136