/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=WIDEST --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 [2020-08-21 22:08:22,091 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 22:08:22,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:08:22,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:08:22,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:08:22,125 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:08:22,127 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:08:22,128 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:08:22,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:08:22,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:08:22,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:08:22,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:08:22,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:08:22,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:08:22,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:08:22,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:08:22,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:08:22,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:08:22,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:08:22,143 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:08:22,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:08:22,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:08:22,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:08:22,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:08:22,167 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:08:22,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:08:22,170 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 [2020-08-21 22:08:22,226 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:08:22,227 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:08:22,233 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:08:22,234 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:08:22,234 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:08:22,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:08:22,234 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:08:22,234 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:08:22,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:08:22,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:08:22,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:08:22,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:08:22,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:08:22,236 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:08:22,237 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:08:22,237 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:08:22,238 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:08:22,238 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:08:22,238 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:08:22,238 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:08:22,239 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:08:22,239 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:08:22,239 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:08:22,239 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:08:22,239 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:08:22,240 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:08:22,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:08:22,240 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:08:22,240 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:08:22,240 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:08:22,571 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:08:22,592 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:08:22,598 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:08:22,600 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:08:22,602 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:08:22,603 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-21 22:08:22,675 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12041d49e/f3c60e04ff264ec7b3299c31c1c72990/FLAGb3618f07f [2020-08-21 22:08:23,146 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:08:23,147 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/EvenOdd01-1.c [2020-08-21 22:08:23,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12041d49e/f3c60e04ff264ec7b3299c31c1c72990/FLAGb3618f07f [2020-08-21 22:08:23,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/12041d49e/f3c60e04ff264ec7b3299c31c1c72990 [2020-08-21 22:08:23,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:08:23,519 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:08:23,520 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:08:23,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:08:23,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:08:23,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4957d7b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23, skipping insertion in model container [2020-08-21 22:08:23,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:08:23,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:08:23,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:08:23,735 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:08:23,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:08:23,769 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:08:23,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23 WrapperNode [2020-08-21 22:08:23,770 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:08:23,771 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:08:23,771 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:08:23,771 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:08:23,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (1/1) ... [2020-08-21 22:08:23,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:08:23,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:08:23,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:08:23,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:08:23,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (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 [2020-08-21 22:08:23,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:08:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:08:23,976 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2020-08-21 22:08:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2020-08-21 22:08:23,977 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:08:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:08:23,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2020-08-21 22:08:23,979 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2020-08-21 22:08:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:08:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:08:23,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:08:24,211 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:08:24,212 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:08:24,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:08:24 BoogieIcfgContainer [2020-08-21 22:08:24,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:08:24,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:08:24,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:08:24,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:08:24,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:08:23" (1/3) ... [2020-08-21 22:08:24,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c17aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:08:24, skipping insertion in model container [2020-08-21 22:08:24,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:08:23" (2/3) ... [2020-08-21 22:08:24,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c17aaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:08:24, skipping insertion in model container [2020-08-21 22:08:24,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:08:24" (3/3) ... [2020-08-21 22:08:24,226 INFO L109 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2020-08-21 22:08:24,237 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:08:24,245 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:08:24,266 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:08:24,309 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:08:24,309 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:08:24,309 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:08:24,309 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:08:24,309 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:08:24,309 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:08:24,309 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:08:24,310 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:08:24,330 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-21 22:08:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 22:08:24,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:24,339 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:24,339 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:24,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:24,346 INFO L82 PathProgramCache]: Analyzing trace with hash -2122072279, now seen corresponding path program 1 times [2020-08-21 22:08:24,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:24,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544725227] [2020-08-21 22:08:24,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:24,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:24,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:24,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:24,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544725227] [2020-08-21 22:08:24,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:24,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:08:24,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631607931] [2020-08-21 22:08:24,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:08:24,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:24,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:08:24,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:08:24,757 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 6 states. [2020-08-21 22:08:24,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:24,901 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-08-21 22:08:24,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:08:24,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-21 22:08:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:24,915 INFO L225 Difference]: With dead ends: 41 [2020-08-21 22:08:24,916 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 22:08:24,920 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 [2020-08-21 22:08:24,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 22:08:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 22:08:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:08:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-21 22:08:24,970 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 14 [2020-08-21 22:08:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:24,971 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-21 22:08:24,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:08:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-21 22:08:24,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-21 22:08:24,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:24,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:08:24,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:08:24,975 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:24,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:24,975 INFO L82 PathProgramCache]: Analyzing trace with hash -612070348, now seen corresponding path program 1 times [2020-08-21 22:08:24,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:24,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661421815] [2020-08-21 22:08:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:25,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:25,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:25,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661421815] [2020-08-21 22:08:25,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:25,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:08:25,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046007817] [2020-08-21 22:08:25,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:08:25,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:08:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:08:25,191 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 7 states. [2020-08-21 22:08:25,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:25,327 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 22:08:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:08:25,328 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-21 22:08:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:25,329 INFO L225 Difference]: With dead ends: 33 [2020-08-21 22:08:25,329 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 22:08:25,331 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 [2020-08-21 22:08:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 22:08:25,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-21 22:08:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:08:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-08-21 22:08:25,339 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2020-08-21 22:08:25,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:25,339 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-08-21 22:08:25,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:08:25,340 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-08-21 22:08:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 22:08:25,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:25,341 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] [2020-08-21 22:08:25,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:08:25,342 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:25,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:25,342 INFO L82 PathProgramCache]: Analyzing trace with hash -592576498, now seen corresponding path program 1 times [2020-08-21 22:08:25,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:25,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033192879] [2020-08-21 22:08:25,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:25,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:25,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033192879] [2020-08-21 22:08:25,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:25,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:08:25,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852446638] [2020-08-21 22:08:25,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:08:25,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:08:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:08:25,437 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-08-21 22:08:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:25,501 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-21 22:08:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:08:25,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 22:08:25,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:25,503 INFO L225 Difference]: With dead ends: 41 [2020-08-21 22:08:25,503 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 22:08:25,504 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 [2020-08-21 22:08:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 22:08:25,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-21 22:08:25,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:08:25,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-21 22:08:25,515 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-08-21 22:08:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:25,515 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-21 22:08:25,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:08:25,515 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-21 22:08:25,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:08:25,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:25,517 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] [2020-08-21 22:08:25,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:08:25,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:25,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:25,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1306118367, now seen corresponding path program 1 times [2020-08-21 22:08:25,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:25,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156419183] [2020-08-21 22:08:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:08:25,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156419183] [2020-08-21 22:08:25,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:25,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-21 22:08:25,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810650421] [2020-08-21 22:08:25,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:08:25,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:25,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:08:25,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:08:25,705 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 9 states. [2020-08-21 22:08:25,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:25,843 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-08-21 22:08:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:08:25,843 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-08-21 22:08:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:25,845 INFO L225 Difference]: With dead ends: 36 [2020-08-21 22:08:25,845 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 22:08:25,846 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 [2020-08-21 22:08:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 22:08:25,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 22:08:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:08:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 22:08:25,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-08-21 22:08:25,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:25,854 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 22:08:25,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:08:25,854 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 22:08:25,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:08:25,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:25,856 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] [2020-08-21 22:08:25,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:08:25,856 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:25,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1571291849, now seen corresponding path program 1 times [2020-08-21 22:08:25,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:25,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467407830] [2020-08-21 22:08:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:25,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:25,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 22:08:25,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467407830] [2020-08-21 22:08:25,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:08:25,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:08:25,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477726070] [2020-08-21 22:08:25,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:08:25,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:25,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:08:25,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:08:25,969 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2020-08-21 22:08:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:26,017 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-08-21 22:08:26,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:08:26,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-21 22:08:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:26,019 INFO L225 Difference]: With dead ends: 42 [2020-08-21 22:08:26,019 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:08:26,021 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 [2020-08-21 22:08:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:08:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:08:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:08:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-21 22:08:26,032 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 28 [2020-08-21 22:08:26,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:26,034 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-21 22:08:26,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:08:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-21 22:08:26,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 22:08:26,035 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:26,036 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] [2020-08-21 22:08:26,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:08:26,037 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:26,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:26,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1610221656, now seen corresponding path program 1 times [2020-08-21 22:08:26,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:26,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393510232] [2020-08-21 22:08:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-08-21 22:08:26,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393510232] [2020-08-21 22:08:26,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:26,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:08:26,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817389562] [2020-08-21 22:08:26,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:08:26,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:26,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:08:26,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:08:26,342 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 12 states. [2020-08-21 22:08:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:26,596 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-08-21 22:08:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:08:26,596 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-08-21 22:08:26,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:26,598 INFO L225 Difference]: With dead ends: 42 [2020-08-21 22:08:26,598 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 22:08:26,599 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 [2020-08-21 22:08:26,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 22:08:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-08-21 22:08:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:08:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-21 22:08:26,607 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 29 [2020-08-21 22:08:26,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:26,607 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-21 22:08:26,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:08:26,608 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-21 22:08:26,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 22:08:26,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:26,609 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] [2020-08-21 22:08:26,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:08:26,610 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:26,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1417612799, now seen corresponding path program 1 times [2020-08-21 22:08:26,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:26,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564542402] [2020-08-21 22:08:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:26,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 22:08:26,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564542402] [2020-08-21 22:08:26,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:26,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:08:26,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876785034] [2020-08-21 22:08:26,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:08:26,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:26,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:08:26,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:08:26,977 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 14 states. [2020-08-21 22:08:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:27,376 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-08-21 22:08:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:08:27,376 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-21 22:08:27,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:27,378 INFO L225 Difference]: With dead ends: 48 [2020-08-21 22:08:27,378 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 22:08:27,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-08-21 22:08:27,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 22:08:27,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-08-21 22:08:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 22:08:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 22:08:27,386 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 36 [2020-08-21 22:08:27,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:27,386 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 22:08:27,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:08:27,386 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 22:08:27,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 22:08:27,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:27,388 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] [2020-08-21 22:08:27,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:08:27,388 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:27,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:27,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1668529660, now seen corresponding path program 2 times [2020-08-21 22:08:27,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:27,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947253091] [2020-08-21 22:08:27,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:27,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-21 22:08:27,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947253091] [2020-08-21 22:08:27,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:27,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 22:08:27,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547870646] [2020-08-21 22:08:27,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 22:08:27,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:27,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 22:08:27,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-08-21 22:08:27,846 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 16 states. [2020-08-21 22:08:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:28,222 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-08-21 22:08:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:08:28,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-08-21 22:08:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:28,229 INFO L225 Difference]: With dead ends: 54 [2020-08-21 22:08:28,229 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 22:08:28,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:08:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 22:08:28,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2020-08-21 22:08:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 22:08:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-21 22:08:28,245 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-21 22:08:28,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:28,246 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-21 22:08:28,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 22:08:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-21 22:08:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-21 22:08:28,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:28,251 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] [2020-08-21 22:08:28,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:08:28,252 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:28,252 INFO L82 PathProgramCache]: Analyzing trace with hash -150927713, now seen corresponding path program 2 times [2020-08-21 22:08:28,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:28,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747966093] [2020-08-21 22:08:28,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:28,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-08-21 22:08:28,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747966093] [2020-08-21 22:08:28,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:28,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 22:08:28,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440736358] [2020-08-21 22:08:28,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 22:08:28,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:28,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 22:08:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:08:28,711 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 18 states. [2020-08-21 22:08:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:29,181 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-08-21 22:08:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:08:29,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-21 22:08:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:29,183 INFO L225 Difference]: With dead ends: 60 [2020-08-21 22:08:29,183 INFO L226 Difference]: Without dead ends: 56 [2020-08-21 22:08:29,184 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 [2020-08-21 22:08:29,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-21 22:08:29,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-21 22:08:29,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 22:08:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-21 22:08:29,191 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 50 [2020-08-21 22:08:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:29,192 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-21 22:08:29,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 22:08:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-21 22:08:29,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 22:08:29,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:29,193 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] [2020-08-21 22:08:29,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:08:29,194 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:29,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:29,194 INFO L82 PathProgramCache]: Analyzing trace with hash -308892384, now seen corresponding path program 3 times [2020-08-21 22:08:29,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:29,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379348339] [2020-08-21 22:08:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:29,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-21 22:08:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379348339] [2020-08-21 22:08:29,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:29,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 22:08:29,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428943701] [2020-08-21 22:08:29,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 22:08:29,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:29,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 22:08:29,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-08-21 22:08:29,696 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2020-08-21 22:08:30,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:30,294 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-08-21 22:08:30,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:08:30,296 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2020-08-21 22:08:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:30,297 INFO L225 Difference]: With dead ends: 66 [2020-08-21 22:08:30,298 INFO L226 Difference]: Without dead ends: 62 [2020-08-21 22:08:30,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=1028, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 22:08:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-21 22:08:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-08-21 22:08:30,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 22:08:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-08-21 22:08:30,309 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 57 [2020-08-21 22:08:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:30,309 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-08-21 22:08:30,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 22:08:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-08-21 22:08:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-21 22:08:30,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:30,311 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] [2020-08-21 22:08:30,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:08:30,311 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1668346559, now seen corresponding path program 3 times [2020-08-21 22:08:30,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:30,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068375153] [2020-08-21 22:08:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-08-21 22:08:30,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068375153] [2020-08-21 22:08:30,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:30,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 22:08:30,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785767447] [2020-08-21 22:08:30,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 22:08:30,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:30,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 22:08:30,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:08:30,813 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 21 states. [2020-08-21 22:08:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:31,467 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-08-21 22:08:31,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:08:31,468 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 64 [2020-08-21 22:08:31,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:31,469 INFO L225 Difference]: With dead ends: 72 [2020-08-21 22:08:31,469 INFO L226 Difference]: Without dead ends: 68 [2020-08-21 22:08:31,474 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 [2020-08-21 22:08:31,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-21 22:08:31,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-08-21 22:08:31,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 22:08:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-08-21 22:08:31,484 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 64 [2020-08-21 22:08:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:31,484 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-08-21 22:08:31,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 22:08:31,485 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-08-21 22:08:31,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 22:08:31,490 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:31,490 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] [2020-08-21 22:08:31,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:08:31,491 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:31,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:31,493 INFO L82 PathProgramCache]: Analyzing trace with hash 353359300, now seen corresponding path program 4 times [2020-08-21 22:08:31,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:31,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661876839] [2020-08-21 22:08:31,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:31,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:31,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:31,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-21 22:08:32,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661876839] [2020-08-21 22:08:32,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:32,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 22:08:32,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445595812] [2020-08-21 22:08:32,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 22:08:32,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:32,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 22:08:32,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:08:32,236 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 24 states. [2020-08-21 22:08:33,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:33,090 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-08-21 22:08:33,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:08:33,091 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-21 22:08:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:33,093 INFO L225 Difference]: With dead ends: 78 [2020-08-21 22:08:33,093 INFO L226 Difference]: Without dead ends: 74 [2020-08-21 22:08:33,095 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 [2020-08-21 22:08:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-21 22:08:33,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 51. [2020-08-21 22:08:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 22:08:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-21 22:08:33,103 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 71 [2020-08-21 22:08:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:33,103 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-21 22:08:33,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 22:08:33,103 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-21 22:08:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-21 22:08:33,105 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:33,105 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] [2020-08-21 22:08:33,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:08:33,105 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:33,105 INFO L82 PathProgramCache]: Analyzing trace with hash -165146017, now seen corresponding path program 4 times [2020-08-21 22:08:33,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:33,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900004240] [2020-08-21 22:08:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-08-21 22:08:33,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900004240] [2020-08-21 22:08:33,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:33,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 22:08:33,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713998457] [2020-08-21 22:08:33,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 22:08:33,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 22:08:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-21 22:08:33,789 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 25 states. [2020-08-21 22:08:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:34,756 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-08-21 22:08:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 22:08:34,757 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 78 [2020-08-21 22:08:34,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:34,758 INFO L225 Difference]: With dead ends: 84 [2020-08-21 22:08:34,758 INFO L226 Difference]: Without dead ends: 80 [2020-08-21 22:08:34,759 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 [2020-08-21 22:08:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-21 22:08:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2020-08-21 22:08:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 22:08:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2020-08-21 22:08:34,767 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 78 [2020-08-21 22:08:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:34,767 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2020-08-21 22:08:34,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 22:08:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2020-08-21 22:08:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 22:08:34,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:34,769 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] [2020-08-21 22:08:34,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:08:34,769 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash 462698472, now seen corresponding path program 5 times [2020-08-21 22:08:34,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:34,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051201742] [2020-08-21 22:08:34,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:34,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:34,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:34,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:34,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:35,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2020-08-21 22:08:35,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051201742] [2020-08-21 22:08:35,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:35,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 22:08:35,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544810404] [2020-08-21 22:08:35,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 22:08:35,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:35,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 22:08:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-08-21 22:08:35,571 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 28 states. [2020-08-21 22:08:36,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:36,677 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2020-08-21 22:08:36,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 22:08:36,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 85 [2020-08-21 22:08:36,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:36,679 INFO L225 Difference]: With dead ends: 90 [2020-08-21 22:08:36,679 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 22:08:36,681 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 [2020-08-21 22:08:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 22:08:36,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 57. [2020-08-21 22:08:36,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 22:08:36,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2020-08-21 22:08:36,688 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 85 [2020-08-21 22:08:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:36,688 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2020-08-21 22:08:36,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 22:08:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2020-08-21 22:08:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-21 22:08:36,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:36,689 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] [2020-08-21 22:08:36,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:08:36,690 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:36,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1580751489, now seen corresponding path program 5 times [2020-08-21 22:08:36,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:36,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233831502] [2020-08-21 22:08:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:36,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:36,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:36,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:36,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:36,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:36,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:36,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:36,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:36,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:36,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-08-21 22:08:37,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233831502] [2020-08-21 22:08:37,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:37,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 22:08:37,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111081116] [2020-08-21 22:08:37,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 22:08:37,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:37,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 22:08:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-21 22:08:37,573 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 29 states. [2020-08-21 22:08:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:38,805 INFO L93 Difference]: Finished difference Result 96 states and 98 transitions. [2020-08-21 22:08:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 22:08:38,806 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 92 [2020-08-21 22:08:38,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:38,808 INFO L225 Difference]: With dead ends: 96 [2020-08-21 22:08:38,808 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 22:08:38,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=2505, Unknown=0, NotChecked=0, Total=2652 [2020-08-21 22:08:38,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 22:08:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-08-21 22:08:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-21 22:08:38,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-21 22:08:38,817 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 92 [2020-08-21 22:08:38,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:38,818 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-21 22:08:38,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 22:08:38,818 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-21 22:08:38,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-08-21 22:08:38,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:38,819 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] [2020-08-21 22:08:38,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:08:38,820 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash 165729164, now seen corresponding path program 6 times [2020-08-21 22:08:38,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:38,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107325556] [2020-08-21 22:08:38,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:38,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:38,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:38,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:39,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2020-08-21 22:08:39,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107325556] [2020-08-21 22:08:39,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:39,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 22:08:39,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579370548] [2020-08-21 22:08:39,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 22:08:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:39,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 22:08:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-08-21 22:08:39,889 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 32 states. [2020-08-21 22:08:41,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:41,349 INFO L93 Difference]: Finished difference Result 102 states and 104 transitions. [2020-08-21 22:08:41,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 22:08:41,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 99 [2020-08-21 22:08:41,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:41,352 INFO L225 Difference]: With dead ends: 102 [2020-08-21 22:08:41,352 INFO L226 Difference]: Without dead ends: 98 [2020-08-21 22:08:41,354 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=3140, Unknown=0, NotChecked=0, Total=3306 [2020-08-21 22:08:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-21 22:08:41,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 63. [2020-08-21 22:08:41,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 22:08:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-08-21 22:08:41,361 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 99 [2020-08-21 22:08:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:41,362 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-08-21 22:08:41,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 22:08:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-08-21 22:08:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-21 22:08:41,363 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:41,363 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] [2020-08-21 22:08:41,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:08:41,363 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:41,364 INFO L82 PathProgramCache]: Analyzing trace with hash -684135393, now seen corresponding path program 6 times [2020-08-21 22:08:41,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:41,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292940612] [2020-08-21 22:08:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:41,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:41,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:41,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:42,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:42,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:42,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:42,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:42,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-08-21 22:08:42,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292940612] [2020-08-21 22:08:42,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:42,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-21 22:08:42,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627010299] [2020-08-21 22:08:42,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-21 22:08:42,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:42,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-21 22:08:42,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 22:08:42,503 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 33 states. [2020-08-21 22:08:44,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:44,167 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-08-21 22:08:44,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 22:08:44,168 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 106 [2020-08-21 22:08:44,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:44,169 INFO L225 Difference]: With dead ends: 108 [2020-08-21 22:08:44,169 INFO L226 Difference]: Without dead ends: 104 [2020-08-21 22:08:44,172 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 [2020-08-21 22:08:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-21 22:08:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 66. [2020-08-21 22:08:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-21 22:08:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-08-21 22:08:44,178 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 106 [2020-08-21 22:08:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:44,178 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-08-21 22:08:44,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-21 22:08:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-08-21 22:08:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-21 22:08:44,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:44,180 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] [2020-08-21 22:08:44,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 22:08:44,180 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash -876959568, now seen corresponding path program 7 times [2020-08-21 22:08:44,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:44,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146217863] [2020-08-21 22:08:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:44,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:44,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:45,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:45,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:45,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:45,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:45,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-08-21 22:08:45,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146217863] [2020-08-21 22:08:45,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:45,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-21 22:08:45,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749733502] [2020-08-21 22:08:45,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-21 22:08:45,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-21 22:08:45,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-08-21 22:08:45,452 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 36 states. [2020-08-21 22:08:47,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:47,342 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-08-21 22:08:47,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-21 22:08:47,347 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 113 [2020-08-21 22:08:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:47,348 INFO L225 Difference]: With dead ends: 114 [2020-08-21 22:08:47,348 INFO L226 Difference]: Without dead ends: 110 [2020-08-21 22:08:47,351 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 [2020-08-21 22:08:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-21 22:08:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 69. [2020-08-21 22:08:47,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 22:08:47,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-21 22:08:47,357 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 113 [2020-08-21 22:08:47,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:47,357 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-21 22:08:47,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-21 22:08:47,358 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-21 22:08:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-08-21 22:08:47,359 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:47,359 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] [2020-08-21 22:08:47,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 22:08:47,360 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:47,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash -307419585, now seen corresponding path program 7 times [2020-08-21 22:08:47,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:47,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [946053763] [2020-08-21 22:08:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:47,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:47,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:47,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:47,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:48,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2020-08-21 22:08:49,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [946053763] [2020-08-21 22:08:49,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:49,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-21 22:08:49,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322582458] [2020-08-21 22:08:49,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-21 22:08:49,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:49,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-21 22:08:49,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-21 22:08:49,189 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 37 states. [2020-08-21 22:08:51,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:51,245 INFO L93 Difference]: Finished difference Result 120 states and 122 transitions. [2020-08-21 22:08:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-21 22:08:51,245 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 120 [2020-08-21 22:08:51,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:51,248 INFO L225 Difference]: With dead ends: 120 [2020-08-21 22:08:51,248 INFO L226 Difference]: Without dead ends: 116 [2020-08-21 22:08:51,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=195, Invalid=4361, Unknown=0, NotChecked=0, Total=4556 [2020-08-21 22:08:51,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-08-21 22:08:51,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-08-21 22:08:51,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-21 22:08:51,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-08-21 22:08:51,258 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 120 [2020-08-21 22:08:51,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:51,259 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-08-21 22:08:51,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-21 22:08:51,259 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-08-21 22:08:51,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-21 22:08:51,261 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:51,261 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] [2020-08-21 22:08:51,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 22:08:51,261 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:51,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:51,262 INFO L82 PathProgramCache]: Analyzing trace with hash -873547948, now seen corresponding path program 8 times [2020-08-21 22:08:51,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:51,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607074349] [2020-08-21 22:08:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:51,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:52,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:53,052 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-08-21 22:08:53,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607074349] [2020-08-21 22:08:53,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:53,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-21 22:08:53,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132783063] [2020-08-21 22:08:53,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-21 22:08:53,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:53,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-21 22:08:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-08-21 22:08:53,056 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 40 states. [2020-08-21 22:08:55,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:55,352 INFO L93 Difference]: Finished difference Result 126 states and 128 transitions. [2020-08-21 22:08:55,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-21 22:08:55,359 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 127 [2020-08-21 22:08:55,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:55,360 INFO L225 Difference]: With dead ends: 126 [2020-08-21 22:08:55,360 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 22:08:55,362 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 [2020-08-21 22:08:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 22:08:55,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 75. [2020-08-21 22:08:55,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 22:08:55,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-08-21 22:08:55,368 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 127 [2020-08-21 22:08:55,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:55,368 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-08-21 22:08:55,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-21 22:08:55,368 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-08-21 22:08:55,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-21 22:08:55,370 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:55,370 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] [2020-08-21 22:08:55,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 22:08:55,370 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:55,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:55,371 INFO L82 PathProgramCache]: Analyzing trace with hash 178099167, now seen corresponding path program 8 times [2020-08-21 22:08:55,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:55,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625668889] [2020-08-21 22:08:55,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:55,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:55,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:56,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:57,115 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-08-21 22:08:57,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625668889] [2020-08-21 22:08:57,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:08:57,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-21 22:08:57,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664344558] [2020-08-21 22:08:57,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-21 22:08:57,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:08:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-21 22:08:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-21 22:08:57,117 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 41 states. [2020-08-21 22:08:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:08:59,653 INFO L93 Difference]: Finished difference Result 132 states and 134 transitions. [2020-08-21 22:08:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-21 22:08:59,654 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 134 [2020-08-21 22:08:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:08:59,656 INFO L225 Difference]: With dead ends: 132 [2020-08-21 22:08:59,656 INFO L226 Difference]: Without dead ends: 128 [2020-08-21 22:08:59,659 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 [2020-08-21 22:08:59,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-21 22:08:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-08-21 22:08:59,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 22:08:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-21 22:08:59,664 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 134 [2020-08-21 22:08:59,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:08:59,664 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-21 22:08:59,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-21 22:08:59,664 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-21 22:08:59,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-21 22:08:59,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:08:59,666 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] [2020-08-21 22:08:59,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 22:08:59,666 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:08:59,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:08:59,666 INFO L82 PathProgramCache]: Analyzing trace with hash 273809272, now seen corresponding path program 9 times [2020-08-21 22:08:59,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:08:59,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251946539] [2020-08-21 22:08:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:08:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:59,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:08:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:59,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:08:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:59,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:08:59,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:08:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:00,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:01,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:01,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:01,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:01,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-08-21 22:09:01,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251946539] [2020-08-21 22:09:01,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:09:01,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-21 22:09:01,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764147810] [2020-08-21 22:09:01,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-21 22:09:01,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:09:01,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-21 22:09:01,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2020-08-21 22:09:01,780 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 44 states. [2020-08-21 22:09:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:09:04,634 INFO L93 Difference]: Finished difference Result 138 states and 140 transitions. [2020-08-21 22:09:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-21 22:09:04,638 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 141 [2020-08-21 22:09:04,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:09:04,640 INFO L225 Difference]: With dead ends: 138 [2020-08-21 22:09:04,640 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 22:09:04,642 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 [2020-08-21 22:09:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 22:09:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2020-08-21 22:09:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 22:09:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-08-21 22:09:04,647 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 141 [2020-08-21 22:09:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:09:04,647 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-08-21 22:09:04,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-21 22:09:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-08-21 22:09:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-08-21 22:09:04,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:09:04,649 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] [2020-08-21 22:09:04,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 22:09:04,650 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:09:04,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:09:04,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1983154945, now seen corresponding path program 9 times [2020-08-21 22:09:04,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:09:04,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257908792] [2020-08-21 22:09:04,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:09:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:04,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:09:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:04,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:09:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:04,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:04,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:04,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:04,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:05,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:06,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:06,876 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-08-21 22:09:06,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257908792] [2020-08-21 22:09:06,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:09:06,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-21 22:09:06,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464005941] [2020-08-21 22:09:06,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-21 22:09:06,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:09:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-21 22:09:06,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-08-21 22:09:06,880 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 46 states. [2020-08-21 22:09:10,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:09:10,011 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-08-21 22:09:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-08-21 22:09:10,012 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 148 [2020-08-21 22:09:10,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:09:10,013 INFO L225 Difference]: With dead ends: 144 [2020-08-21 22:09:10,013 INFO L226 Difference]: Without dead ends: 140 [2020-08-21 22:09:10,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=250, Invalid=7060, Unknown=0, NotChecked=0, Total=7310 [2020-08-21 22:09:10,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-21 22:09:10,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-08-21 22:09:10,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-21 22:09:10,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2020-08-21 22:09:10,021 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 148 [2020-08-21 22:09:10,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:09:10,021 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2020-08-21 22:09:10,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-21 22:09:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2020-08-21 22:09:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-08-21 22:09:10,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:09:10,023 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] [2020-08-21 22:09:10,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 22:09:10,029 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:09:10,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:09:10,029 INFO L82 PathProgramCache]: Analyzing trace with hash -708738788, now seen corresponding path program 10 times [2020-08-21 22:09:10,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:09:10,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091157825] [2020-08-21 22:09:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:09:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:09:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:09:10,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:10,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:10,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:11,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:12,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:12,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-08-21 22:09:12,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091157825] [2020-08-21 22:09:12,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:09:12,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-21 22:09:12,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096193252] [2020-08-21 22:09:12,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-21 22:09:12,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:09:12,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-21 22:09:12,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-08-21 22:09:12,479 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 48 states. [2020-08-21 22:09:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:09:16,049 INFO L93 Difference]: Finished difference Result 150 states and 152 transitions. [2020-08-21 22:09:16,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-08-21 22:09:16,052 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 155 [2020-08-21 22:09:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:09:16,054 INFO L225 Difference]: With dead ends: 150 [2020-08-21 22:09:16,054 INFO L226 Difference]: Without dead ends: 146 [2020-08-21 22:09:16,056 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 [2020-08-21 22:09:16,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-21 22:09:16,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 87. [2020-08-21 22:09:16,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 22:09:16,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-21 22:09:16,063 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 155 [2020-08-21 22:09:16,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:09:16,064 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-21 22:09:16,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-21 22:09:16,064 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-21 22:09:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-08-21 22:09:16,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:09:16,066 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] [2020-08-21 22:09:16,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 22:09:16,067 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:09:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:09:16,067 INFO L82 PathProgramCache]: Analyzing trace with hash -448788065, now seen corresponding path program 10 times [2020-08-21 22:09:16,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:09:16,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619909816] [2020-08-21 22:09:16,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:09:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:09:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 22:09:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:16,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:17,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:17,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:09:17,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 22:09:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat