/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:11:33,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:11:33,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:11:33,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:11:33,405 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:11:33,414 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:11:33,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:11:33,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:11:33,422 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:11:33,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:11:33,427 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:11:33,428 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:11:33,428 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:11:33,431 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:11:33,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:11:33,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:11:33,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:11:33,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:11:33,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:11:33,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:11:33,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:11:33,450 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:11:33,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:11:33,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:11:33,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:11:33,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:11:33,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:11:33,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:11:33,487 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 [2020-08-22 02:11:33,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:11:33,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:11:33,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:11:33,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:11:33,527 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:11:33,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:11:33,528 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:11:33,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:11:33,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:11:33,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:11:33,529 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:11:33,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:11:33,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:11:33,530 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:11:33,530 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:11:33,530 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:11:33,530 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:11:33,531 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:11:33,531 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:11:33,531 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:11:33,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:11:33,532 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:11:33,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:11:33,532 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:11:33,532 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:11:33,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:11:33,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:11:33,533 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:11:33,533 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:11:33,533 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=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:11:33,848 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:11:33,861 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:11:33,864 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:11:33,866 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:11:33,866 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:11:33,867 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-22 02:11:33,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/324c998fd/6d0c51a0aa484cc98d7092c4a541a920/FLAG0c3d42b8d [2020-08-22 02:11:34,407 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:11:34,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-22 02:11:34,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/324c998fd/6d0c51a0aa484cc98d7092c4a541a920/FLAG0c3d42b8d [2020-08-22 02:11:34,768 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/324c998fd/6d0c51a0aa484cc98d7092c4a541a920 [2020-08-22 02:11:34,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:11:34,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:11:34,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:11:34,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:11:34,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:11:34,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:11:34" (1/1) ... [2020-08-22 02:11:34,788 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@425b51b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:34, skipping insertion in model container [2020-08-22 02:11:34,788 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:11:34" (1/1) ... [2020-08-22 02:11:34,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:11:34,813 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:11:34,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:11:34,986 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:11:35,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:11:35,012 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:11:35,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35 WrapperNode [2020-08-22 02:11:35,013 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:11:35,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:11:35,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:11:35,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:11:35,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,028 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (1/1) ... [2020-08-22 02:11:35,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:11:35,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:11:35,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:11:35,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:11:35,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (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 [2020-08-22 02:11:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:11:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:11:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-08-22 02:11:35,174 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-08-22 02:11:35,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:11:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:11:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 02:11:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-08-22 02:11:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-08-22 02:11:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:11:35,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:11:35,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:11:35,468 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:11:35,468 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:11:35,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:11:35 BoogieIcfgContainer [2020-08-22 02:11:35,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:11:35,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:11:35,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:11:35,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:11:35,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:11:34" (1/3) ... [2020-08-22 02:11:35,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549e2be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:11:35, skipping insertion in model container [2020-08-22 02:11:35,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:11:35" (2/3) ... [2020-08-22 02:11:35,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@549e2be9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:11:35, skipping insertion in model container [2020-08-22 02:11:35,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:11:35" (3/3) ... [2020-08-22 02:11:35,485 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-08-22 02:11:35,496 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:11:35,503 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:11:35,518 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:11:35,543 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:11:35,543 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:11:35,543 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:11:35,543 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:11:35,543 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:11:35,544 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:11:35,544 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:11:35,544 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:11:35,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 02:11:35,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 02:11:35,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:35,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:35,569 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:35,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:35,574 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-08-22 02:11:35,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:35,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575191419] [2020-08-22 02:11:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:35,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:35,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:11:35,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575191419] [2020-08-22 02:11:35,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:11:35,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 02:11:35,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135438917] [2020-08-22 02:11:35,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 02:11:35,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:35,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 02:11:35,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:11:35,916 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-08-22 02:11:36,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:36,050 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-08-22 02:11:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 02:11:36,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-22 02:11:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:36,064 INFO L225 Difference]: With dead ends: 41 [2020-08-22 02:11:36,064 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 02:11:36,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:11:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 02:11:36,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 02:11:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 02:11:36,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 02:11:36,113 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-08-22 02:11:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:36,113 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 02:11:36,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 02:11:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 02:11:36,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 02:11:36,116 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:36,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:36,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:11:36,117 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-08-22 02:11:36,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:36,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674265544] [2020-08-22 02:11:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:36,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:11:36,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674265544] [2020-08-22 02:11:36,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:11:36,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 02:11:36,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970709365] [2020-08-22 02:11:36,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:11:36,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:36,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:11:36,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:11:36,351 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-08-22 02:11:36,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:36,467 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-22 02:11:36,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:11:36,468 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-22 02:11:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:36,470 INFO L225 Difference]: With dead ends: 33 [2020-08-22 02:11:36,470 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 02:11:36,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:11:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 02:11:36,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 02:11:36,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 02:11:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-22 02:11:36,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-08-22 02:11:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:36,480 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-22 02:11:36,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:11:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-22 02:11:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 02:11:36,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:36,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:36,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:11:36,483 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:36,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:36,483 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-08-22 02:11:36,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:36,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925750391] [2020-08-22 02:11:36,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:36,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:36,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:11:36,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925750391] [2020-08-22 02:11:36,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:11:36,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:11:36,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447089726] [2020-08-22 02:11:36,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:11:36,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:11:36,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:11:36,559 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-08-22 02:11:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:36,606 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-22 02:11:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:11:36,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-22 02:11:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:36,608 INFO L225 Difference]: With dead ends: 41 [2020-08-22 02:11:36,609 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 02:11:36,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:11:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 02:11:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-22 02:11:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 02:11:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-22 02:11:36,617 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-08-22 02:11:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:36,618 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-22 02:11:36,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:11:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-22 02:11:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 02:11:36,619 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:36,620 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:36,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:11:36,620 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-08-22 02:11:36,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:36,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064348767] [2020-08-22 02:11:36,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:36,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:11:36,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064348767] [2020-08-22 02:11:36,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:11:36,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 02:11:36,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635859654] [2020-08-22 02:11:36,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:11:36,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:36,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:11:36,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:11:36,879 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-08-22 02:11:37,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:37,040 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-08-22 02:11:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:11:37,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-22 02:11:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:37,043 INFO L225 Difference]: With dead ends: 36 [2020-08-22 02:11:37,043 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 02:11:37,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:11:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 02:11:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 02:11:37,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 02:11:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-22 02:11:37,051 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-08-22 02:11:37,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:37,052 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-22 02:11:37,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:11:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-22 02:11:37,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 02:11:37,053 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:37,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:37,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:11:37,054 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:37,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:37,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-08-22 02:11:37,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:37,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934809642] [2020-08-22 02:11:37,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:37,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:37,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 02:11:37,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934809642] [2020-08-22 02:11:37,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:11:37,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:11:37,135 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816014232] [2020-08-22 02:11:37,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:11:37,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:11:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:11:37,136 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-08-22 02:11:37,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:37,177 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-22 02:11:37,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:11:37,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 02:11:37,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:37,179 INFO L225 Difference]: With dead ends: 42 [2020-08-22 02:11:37,179 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 02:11:37,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 02:11:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 02:11:37,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 02:11:37,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 02:11:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-22 02:11:37,187 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-08-22 02:11:37,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:37,187 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-22 02:11:37,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:11:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-22 02:11:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 02:11:37,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:37,189 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 02:11:37,189 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:11:37,190 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-08-22 02:11:37,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:37,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306844904] [2020-08-22 02:11:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:37,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-22 02:11:37,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306844904] [2020-08-22 02:11:37,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:37,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 02:11:37,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009454383] [2020-08-22 02:11:37,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 02:11:37,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:37,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 02:11:37,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-22 02:11:37,442 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-08-22 02:11:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:37,685 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-22 02:11:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 02:11:37,686 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-08-22 02:11:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:37,687 INFO L225 Difference]: With dead ends: 42 [2020-08-22 02:11:37,688 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 02:11:37,689 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:11:37,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 02:11:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-08-22 02:11:37,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 02:11:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-22 02:11:37,696 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-08-22 02:11:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:37,696 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-22 02:11:37,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 02:11:37,697 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-22 02:11:37,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 02:11:37,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:37,698 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:37,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:11:37,698 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:37,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:37,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-08-22 02:11:37,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:37,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261274781] [2020-08-22 02:11:37,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:37,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:37,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 02:11:38,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261274781] [2020-08-22 02:11:38,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:38,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 02:11:38,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805062394] [2020-08-22 02:11:38,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 02:11:38,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:38,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 02:11:38,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-22 02:11:38,082 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2020-08-22 02:11:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:38,414 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-22 02:11:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 02:11:38,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-22 02:11:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:38,416 INFO L225 Difference]: With dead ends: 48 [2020-08-22 02:11:38,416 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 02:11:38,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-08-22 02:11:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 02:11:38,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-22 02:11:38,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 02:11:38,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-22 02:11:38,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-08-22 02:11:38,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:38,424 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-22 02:11:38,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 02:11:38,424 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-22 02:11:38,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 02:11:38,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:38,426 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:38,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:11:38,426 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:38,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:38,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-08-22 02:11:38,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:38,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675561950] [2020-08-22 02:11:38,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:38,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-22 02:11:38,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675561950] [2020-08-22 02:11:38,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:38,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 02:11:38,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269080281] [2020-08-22 02:11:38,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 02:11:38,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 02:11:38,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-22 02:11:38,787 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-08-22 02:11:39,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:39,138 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-22 02:11:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 02:11:39,139 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-22 02:11:39,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:39,141 INFO L225 Difference]: With dead ends: 54 [2020-08-22 02:11:39,141 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 02:11:39,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-08-22 02:11:39,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 02:11:39,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-08-22 02:11:39,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 02:11:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-22 02:11:39,148 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-22 02:11:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:39,149 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-22 02:11:39,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 02:11:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-22 02:11:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 02:11:39,151 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:39,151 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:39,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:11:39,151 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:39,152 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-08-22 02:11:39,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:39,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610384854] [2020-08-22 02:11:39,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:39,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:39,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:39,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:39,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-22 02:11:39,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610384854] [2020-08-22 02:11:39,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:39,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 02:11:39,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293006027] [2020-08-22 02:11:39,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 02:11:39,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:39,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 02:11:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-22 02:11:39,570 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 18 states. [2020-08-22 02:11:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:40,036 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-22 02:11:40,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 02:11:40,037 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-22 02:11:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:40,038 INFO L225 Difference]: With dead ends: 60 [2020-08-22 02:11:40,038 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 02:11:40,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=788, Unknown=0, NotChecked=0, Total=870 [2020-08-22 02:11:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 02:11:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-22 02:11:40,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 02:11:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 02:11:40,047 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-08-22 02:11:40,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:40,047 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 02:11:40,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 02:11:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 02:11:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 02:11:40,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:40,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:40,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:11:40,049 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:40,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:40,049 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-08-22 02:11:40,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:40,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443466765] [2020-08-22 02:11:40,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:40,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:40,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:40,532 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-22 02:11:40,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443466765] [2020-08-22 02:11:40,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:40,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 02:11:40,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101166870] [2020-08-22 02:11:40,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 02:11:40,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:40,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 02:11:40,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-22 02:11:40,535 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-08-22 02:11:41,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:41,172 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-22 02:11:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 02:11:41,173 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-08-22 02:11:41,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:41,174 INFO L225 Difference]: With dead ends: 66 [2020-08-22 02:11:41,174 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 02:11:41,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 02:11:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 02:11:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-08-22 02:11:41,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 02:11:41,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-22 02:11:41,182 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-08-22 02:11:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:41,183 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-22 02:11:41,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 02:11:41,183 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-22 02:11:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 02:11:41,184 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:41,184 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:41,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:11:41,185 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:41,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-08-22 02:11:41,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:41,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173346829] [2020-08-22 02:11:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:41,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-22 02:11:41,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173346829] [2020-08-22 02:11:41,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:41,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 02:11:41,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383531954] [2020-08-22 02:11:41,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 02:11:41,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:41,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 02:11:41,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 02:11:41,674 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-22 02:11:42,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:42,394 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-08-22 02:11:42,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 02:11:42,395 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-08-22 02:11:42,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:42,396 INFO L225 Difference]: With dead ends: 72 [2020-08-22 02:11:42,396 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 02:11:42,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=1161, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 02:11:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 02:11:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-08-22 02:11:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 02:11:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-08-22 02:11:42,404 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-08-22 02:11:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:42,404 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-08-22 02:11:42,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 02:11:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-08-22 02:11:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 02:11:42,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:42,406 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:42,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:11:42,406 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-08-22 02:11:42,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:42,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457172510] [2020-08-22 02:11:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:42,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:42,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:43,028 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-22 02:11:43,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457172510] [2020-08-22 02:11:43,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:43,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 02:11:43,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298495934] [2020-08-22 02:11:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 02:11:43,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 02:11:43,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-22 02:11:43,031 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-08-22 02:11:43,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:43,855 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-08-22 02:11:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 02:11:43,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-22 02:11:43,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:43,857 INFO L225 Difference]: With dead ends: 78 [2020-08-22 02:11:43,857 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 02:11:43,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 02:11:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 02:11:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-08-22 02:11:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 02:11:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-22 02:11:43,866 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-08-22 02:11:43,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:43,867 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-22 02:11:43,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 02:11:43,867 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-22 02:11:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 02:11:43,868 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:43,868 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:43,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 02:11:43,868 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-08-22 02:11:43,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:43,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092631524] [2020-08-22 02:11:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:43,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:43,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:43,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:44,612 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-22 02:11:44,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092631524] [2020-08-22 02:11:44,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:44,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 02:11:44,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595539030] [2020-08-22 02:11:44,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 02:11:44,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:44,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 02:11:44,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 02:11:44,615 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-08-22 02:11:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:45,525 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-08-22 02:11:45,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 02:11:45,526 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-08-22 02:11:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:45,527 INFO L225 Difference]: With dead ends: 84 [2020-08-22 02:11:45,528 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 02:11:45,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=1769, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 02:11:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 02:11:45,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-08-22 02:11:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 02:11:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-22 02:11:45,536 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-08-22 02:11:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:45,536 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-22 02:11:45,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 02:11:45,537 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-22 02:11:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 02:11:45,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:45,538 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:45,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 02:11:45,538 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:45,539 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-08-22 02:11:45,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:45,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571158354] [2020-08-22 02:11:45,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:45,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:45,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:45,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:46,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:46,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:46,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:46,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-08-22 02:11:46,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571158354] [2020-08-22 02:11:46,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:46,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 02:11:46,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492321828] [2020-08-22 02:11:46,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 02:11:46,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:46,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 02:11:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-22 02:11:46,382 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2020-08-22 02:11:47,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:47,481 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-08-22 02:11:47,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 02:11:47,482 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-08-22 02:11:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:47,483 INFO L225 Difference]: With dead ends: 90 [2020-08-22 02:11:47,483 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 02:11:47,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=142, Invalid=2308, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 02:11:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 02:11:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-08-22 02:11:47,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 02:11:47,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-08-22 02:11:47,491 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-08-22 02:11:47,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:47,491 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-08-22 02:11:47,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 02:11:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-08-22 02:11:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 02:11:47,493 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:47,493 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:47,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 02:11:47,493 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:47,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:47,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-08-22 02:11:47,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:47,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658260098] [2020-08-22 02:11:47,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:47,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:47,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:48,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:48,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:48,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:48,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-22 02:11:48,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658260098] [2020-08-22 02:11:48,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:48,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 02:11:48,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909880145] [2020-08-22 02:11:48,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 02:11:48,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 02:11:48,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 02:11:48,352 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-08-22 02:11:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:49,736 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-08-22 02:11:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 02:11:49,737 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-08-22 02:11:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:49,738 INFO L225 Difference]: With dead ends: 96 [2020-08-22 02:11:49,739 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 02:11:49,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 02:11:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 02:11:49,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-08-22 02:11:49,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 02:11:49,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-22 02:11:49,747 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-08-22 02:11:49,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:49,747 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-22 02:11:49,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 02:11:49,748 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-22 02:11:49,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-22 02:11:49,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:49,749 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:49,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 02:11:49,749 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:49,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:49,750 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-08-22 02:11:49,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:49,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495966999] [2020-08-22 02:11:49,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:49,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:49,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:49,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:49,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:50,817 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-08-22 02:11:50,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495966999] [2020-08-22 02:11:50,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:50,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 02:11:50,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683529911] [2020-08-22 02:11:50,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 02:11:50,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 02:11:50,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-22 02:11:50,820 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 32 states. [2020-08-22 02:11:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:52,304 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-22 02:11:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 02:11:52,305 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2020-08-22 02:11:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:52,306 INFO L225 Difference]: With dead ends: 102 [2020-08-22 02:11:52,306 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 02:11:52,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=3140, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 02:11:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 02:11:52,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-08-22 02:11:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 02:11:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-22 02:11:52,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-08-22 02:11:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:52,315 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-22 02:11:52,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 02:11:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-22 02:11:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 02:11:52,316 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:52,316 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:52,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 02:11:52,317 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-08-22 02:11:52,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:52,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467721905] [2020-08-22 02:11:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:52,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:53,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:53,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:53,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:53,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-22 02:11:53,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467721905] [2020-08-22 02:11:53,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:53,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 02:11:53,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267447421] [2020-08-22 02:11:53,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 02:11:53,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:53,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 02:11:53,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 02:11:53,494 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 33 states. [2020-08-22 02:11:55,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:55,091 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-08-22 02:11:55,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 02:11:55,091 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-08-22 02:11:55,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:55,092 INFO L225 Difference]: With dead ends: 108 [2020-08-22 02:11:55,093 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 02:11:55,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=171, Invalid=3369, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 02:11:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 02:11:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-08-22 02:11:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 02:11:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-08-22 02:11:55,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-08-22 02:11:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:55,100 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-08-22 02:11:55,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 02:11:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-08-22 02:11:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 02:11:55,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:55,103 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:55,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 02:11:55,103 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:55,104 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-08-22 02:11:55,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:55,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267116622] [2020-08-22 02:11:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:55,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:55,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:56,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:56,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:56,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:56,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-08-22 02:11:56,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267116622] [2020-08-22 02:11:56,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:11:56,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 02:11:56,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660521356] [2020-08-22 02:11:56,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 02:11:56,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:11:56,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 02:11:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 02:11:56,418 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 36 states. [2020-08-22 02:11:58,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:11:58,375 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-08-22 02:11:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 02:11:58,379 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-08-22 02:11:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:11:58,380 INFO L225 Difference]: With dead ends: 114 [2020-08-22 02:11:58,381 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 02:11:58,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=4100, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 02:11:58,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 02:11:58,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-08-22 02:11:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 02:11:58,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-22 02:11:58,389 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-08-22 02:11:58,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:11:58,390 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-22 02:11:58,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 02:11:58,390 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-22 02:11:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-22 02:11:58,391 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:11:58,391 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:11:58,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 02:11:58,392 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:11:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:11:58,392 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-08-22 02:11:58,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:11:58,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266698603] [2020-08-22 02:11:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:11:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:11:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:11:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:58,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:58,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:58,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:11:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:11:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-22 02:12:00,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266698603] [2020-08-22 02:12:00,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:00,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 02:12:00,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342177109] [2020-08-22 02:12:00,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 02:12:00,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 02:12:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 02:12:00,088 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 37 states. [2020-08-22 02:12:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:12:02,129 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-08-22 02:12:02,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 02:12:02,130 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 120 [2020-08-22 02:12:02,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:12:02,132 INFO L225 Difference]: With dead ends: 120 [2020-08-22 02:12:02,132 INFO L226 Difference]: Without dead ends: 116 [2020-08-22 02:12:02,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 02:12:02,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-22 02:12:02,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-08-22 02:12:02,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 02:12:02,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-08-22 02:12:02,140 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-08-22 02:12:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:12:02,141 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-08-22 02:12:02,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 02:12:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-08-22 02:12:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 02:12:02,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:12:02,143 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:12:02,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 02:12:02,143 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:12:02,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:12:02,143 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-08-22 02:12:02,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:12:02,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659920607] [2020-08-22 02:12:02,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:12:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:12:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:12:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:02,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:03,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-08-22 02:12:03,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659920607] [2020-08-22 02:12:03,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:03,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 02:12:03,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070310457] [2020-08-22 02:12:03,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 02:12:03,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:03,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 02:12:03,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 02:12:03,797 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 40 states. [2020-08-22 02:12:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:12:06,081 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-08-22 02:12:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 02:12:06,082 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-08-22 02:12:06,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:12:06,083 INFO L225 Difference]: With dead ends: 126 [2020-08-22 02:12:06,084 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 02:12:06,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=5188, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 02:12:06,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 02:12:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-08-22 02:12:06,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 02:12:06,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-08-22 02:12:06,092 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-08-22 02:12:06,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:12:06,092 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-08-22 02:12:06,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 02:12:06,092 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-08-22 02:12:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 02:12:06,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:12:06,093 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:12:06,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 02:12:06,094 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:12:06,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:12:06,094 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-08-22 02:12:06,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:12:06,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [963924412] [2020-08-22 02:12:06,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:12:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:12:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:12:06,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:06,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:07,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:07,839 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-08-22 02:12:07,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [963924412] [2020-08-22 02:12:07,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:07,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 02:12:07,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943904832] [2020-08-22 02:12:07,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 02:12:07,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 02:12:07,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 02:12:07,842 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 41 states. [2020-08-22 02:12:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:12:10,365 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-22 02:12:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 02:12:10,366 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-08-22 02:12:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:12:10,368 INFO L225 Difference]: With dead ends: 132 [2020-08-22 02:12:10,368 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 02:12:10,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=219, Invalid=5481, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 02:12:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 02:12:10,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-08-22 02:12:10,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 02:12:10,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 02:12:10,378 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-08-22 02:12:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:12:10,379 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 02:12:10,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 02:12:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 02:12:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-22 02:12:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:12:10,381 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:12:10,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 02:12:10,381 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:12:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:12:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-08-22 02:12:10,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:12:10,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587064304] [2020-08-22 02:12:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:12:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:12:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:12:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:10,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:10,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:10,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:10,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:10,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:11,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:12,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:12,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:12,430 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-08-22 02:12:12,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587064304] [2020-08-22 02:12:12,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:12,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 02:12:12,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909923721] [2020-08-22 02:12:12,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 02:12:12,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:12,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 02:12:12,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 02:12:12,433 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 44 states. [2020-08-22 02:12:15,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:12:15,315 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-08-22 02:12:15,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 02:12:15,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 141 [2020-08-22 02:12:15,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:12:15,320 INFO L225 Difference]: With dead ends: 138 [2020-08-22 02:12:15,320 INFO L226 Difference]: Without dead ends: 134 [2020-08-22 02:12:15,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=238, Invalid=6404, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 02:12:15,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-22 02:12:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-08-22 02:12:15,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 02:12:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-08-22 02:12:15,329 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-08-22 02:12:15,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:12:15,329 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-08-22 02:12:15,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 02:12:15,329 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-08-22 02:12:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-22 02:12:15,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:12:15,330 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:12:15,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 02:12:15,331 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:12:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:12:15,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-08-22 02:12:15,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:12:15,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188848677] [2020-08-22 02:12:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:12:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:12:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:12:15,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:15,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:15,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:15,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:15,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:16,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:17,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:17,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:17,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:17,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:17,615 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-08-22 02:12:17,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188848677] [2020-08-22 02:12:17,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:17,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 02:12:17,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301219683] [2020-08-22 02:12:17,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 02:12:17,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:17,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 02:12:17,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 02:12:17,618 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 46 states. [2020-08-22 02:12:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:12:20,838 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-08-22 02:12:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-22 02:12:20,838 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-08-22 02:12:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:12:20,840 INFO L225 Difference]: With dead ends: 144 [2020-08-22 02:12:20,840 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 02:12:20,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=250, Invalid=7060, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 02:12:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 02:12:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-08-22 02:12:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 02:12:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-22 02:12:20,846 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-08-22 02:12:20,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:12:20,847 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-22 02:12:20,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 02:12:20,847 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-22 02:12:20,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-22 02:12:20,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:12:20,848 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:12:20,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 02:12:20,849 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:12:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:12:20,849 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-08-22 02:12:20,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:12:20,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976324281] [2020-08-22 02:12:20,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:12:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:12:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:20,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:12:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:21,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:22,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:23,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-08-22 02:12:23,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976324281] [2020-08-22 02:12:23,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:23,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 02:12:23,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794976648] [2020-08-22 02:12:23,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 02:12:23,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:23,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 02:12:23,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 02:12:23,308 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 48 states. [2020-08-22 02:12:26,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:12:26,792 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-08-22 02:12:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-22 02:12:26,794 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 155 [2020-08-22 02:12:26,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:12:26,796 INFO L225 Difference]: With dead ends: 150 [2020-08-22 02:12:26,796 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 02:12:26,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=262, Invalid=7748, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 02:12:26,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 02:12:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-08-22 02:12:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 02:12:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-22 02:12:26,806 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-08-22 02:12:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:12:26,806 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-22 02:12:26,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 02:12:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-22 02:12:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-22 02:12:26,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:12:26,808 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:12:26,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 02:12:26,811 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:12:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:12:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-08-22 02:12:26,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:12:26,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789985728] [2020-08-22 02:12:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:12:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:26,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:12:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:26,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 02:12:26,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:26,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:26,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:27,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:28,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:29,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 02:12:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:12:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2020-08-22 02:12:29,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789985728] [2020-08-22 02:12:29,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:12:29,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 02:12:29,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615660908] [2020-08-22 02:12:29,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 02:12:29,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:12:29,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 02:12:29,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 02:12:29,355 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 49 states.