/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:50:40,736 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:50:40,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:50:40,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:50:40,764 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:50:40,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:50:40,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:50:40,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:50:40,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:50:40,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:50:40,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:50:40,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:50:40,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:50:40,778 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:50:40,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:50:40,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:50:40,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:50:40,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:50:40,790 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:50:40,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:50:40,795 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:50:40,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:50:40,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:50:40,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:50:40,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 03:50:40,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:50:40,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:50:40,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:50:40,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 03:50:40,873 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:50:40,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:50:40,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:50:40,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:50:40,877 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:50:40,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:50:40,877 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:50:40,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:50:40,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:50:40,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:50:40,879 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:50:40,879 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:50:40,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:50:40,880 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:50:40,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:50:40,881 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:50:40,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:50:40,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:50:40,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:50:40,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:50:40,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:50:40,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:50:40,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:50:40,883 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:50:40,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:50:40,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:50:40,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:50:40,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:50:40,884 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:50:40,884 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:50:41,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:50:41,260 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:50:41,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:50:41,269 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:50:41,270 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:50:41,271 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-08-22 03:50:41,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7d2022e7/79ad58c826914945bd37db3793cd282e/FLAG1ce8aa51a [2020-08-22 03:50:41,788 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:50:41,789 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-08-22 03:50:41,796 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7d2022e7/79ad58c826914945bd37db3793cd282e/FLAG1ce8aa51a [2020-08-22 03:50:42,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b7d2022e7/79ad58c826914945bd37db3793cd282e [2020-08-22 03:50:42,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:50:42,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:50:42,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:42,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:50:42,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:50:42,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e2857fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42, skipping insertion in model container [2020-08-22 03:50:42,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,230 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:50:42,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:50:42,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:42,465 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:50:42,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:42,498 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:50:42,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42 WrapperNode [2020-08-22 03:50:42,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:42,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:50:42,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:50:42,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:50:42,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... [2020-08-22 03:50:42,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:50:42,684 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:50:42,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:50:42,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:50:42,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:50:42,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:50:42,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:50:42,749 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 03:50:42,749 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:50:42,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 03:50:42,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:50:42,749 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 03:50:42,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:50:42,749 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:50:42,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:50:42,901 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:50:42,902 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:50:42,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:42 BoogieIcfgContainer [2020-08-22 03:50:42,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:50:42,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:50:42,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:50:42,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:50:42,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:50:42" (1/3) ... [2020-08-22 03:50:42,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5548cef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:42, skipping insertion in model container [2020-08-22 03:50:42,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:42" (2/3) ... [2020-08-22 03:50:42,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5548cef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:42, skipping insertion in model container [2020-08-22 03:50:42,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:42" (3/3) ... [2020-08-22 03:50:42,914 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2020-08-22 03:50:42,924 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:50:42,931 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:50:42,945 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:50:42,969 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:50:42,970 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:50:42,970 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:50:42,970 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:50:42,970 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:50:42,970 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:50:42,971 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:50:42,971 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:50:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 03:50:42,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 03:50:42,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:42,995 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:42,996 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:43,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:43,001 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 03:50:43,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:43,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87978757] [2020-08-22 03:50:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:43,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,287 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-22 03:50:43,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:50:43,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87978757] [2020-08-22 03:50:43,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:50:43,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:50:43,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248607602] [2020-08-22 03:50:43,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:50:43,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:43,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:50:43,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:50:43,425 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 03:50:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:43,477 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 03:50:43,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:50:43,479 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 03:50:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:43,490 INFO L225 Difference]: With dead ends: 32 [2020-08-22 03:50:43,491 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 03:50:43,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:50:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 03:50:43,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 03:50:43,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 03:50:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 03:50:43,539 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 03:50:43,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:43,539 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 03:50:43,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:50:43,540 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 03:50:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:50:43,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:43,542 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:43,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:50:43,543 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:43,544 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 03:50:43,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:43,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417830982] [2020-08-22 03:50:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 03:50:43,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417830982] [2020-08-22 03:50:43,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:43,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:50:43,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743813384] [2020-08-22 03:50:43,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:50:43,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:43,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:50:43,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:43,739 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-22 03:50:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:43,769 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 03:50:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:50:43,770 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 03:50:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:43,772 INFO L225 Difference]: With dead ends: 25 [2020-08-22 03:50:43,772 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 03:50:43,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 03:50:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 03:50:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 03:50:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 03:50:43,781 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 03:50:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:43,781 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 03:50:43,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:50:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 03:50:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:50:43,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:43,784 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:43,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:50:43,784 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:43,785 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 03:50:43,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:43,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398290878] [2020-08-22 03:50:43,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:43,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:43,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 03:50:44,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398290878] [2020-08-22 03:50:44,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:44,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 03:50:44,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507532326] [2020-08-22 03:50:44,080 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 03:50:44,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:44,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 03:50:44,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:50:44,082 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 03:50:44,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:44,137 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 03:50:44,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:50:44,138 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 03:50:44,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:44,139 INFO L225 Difference]: With dead ends: 28 [2020-08-22 03:50:44,140 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 03:50:44,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:50:44,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 03:50:44,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 03:50:44,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 03:50:44,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 03:50:44,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 03:50:44,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:44,149 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 03:50:44,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 03:50:44,149 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 03:50:44,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 03:50:44,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:44,151 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:44,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:50:44,151 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:44,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:44,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 03:50:44,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:44,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61273980] [2020-08-22 03:50:44,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 03:50:44,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61273980] [2020-08-22 03:50:44,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:44,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 03:50:44,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749988543] [2020-08-22 03:50:44,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 03:50:44,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:44,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 03:50:44,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:50:44,437 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-22 03:50:44,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:44,498 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 03:50:44,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:50:44,499 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 03:50:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:44,500 INFO L225 Difference]: With dead ends: 31 [2020-08-22 03:50:44,501 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 03:50:44,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:50:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 03:50:44,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 03:50:44,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 03:50:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 03:50:44,508 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 03:50:44,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:44,509 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 03:50:44,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 03:50:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 03:50:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 03:50:44,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:44,510 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:44,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:50:44,511 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:44,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 03:50:44,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:44,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58069714] [2020-08-22 03:50:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 03:50:44,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58069714] [2020-08-22 03:50:44,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:44,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 03:50:44,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528477482] [2020-08-22 03:50:44,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 03:50:44,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:44,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 03:50:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:50:44,903 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-22 03:50:44,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:44,997 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 03:50:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 03:50:44,998 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 03:50:44,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:45,002 INFO L225 Difference]: With dead ends: 34 [2020-08-22 03:50:45,002 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 03:50:45,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 03:50:45,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 03:50:45,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 03:50:45,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 03:50:45,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 03:50:45,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 03:50:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:45,019 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 03:50:45,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 03:50:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 03:50:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 03:50:45,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:45,024 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:45,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:50:45,025 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 03:50:45,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:45,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820818469] [2020-08-22 03:50:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,488 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 03:50:45,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820818469] [2020-08-22 03:50:45,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:45,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 03:50:45,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47095215] [2020-08-22 03:50:45,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 03:50:45,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 03:50:45,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:50:45,493 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-22 03:50:45,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:45,607 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 03:50:45,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 03:50:45,608 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-22 03:50:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:45,609 INFO L225 Difference]: With dead ends: 37 [2020-08-22 03:50:45,610 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 03:50:45,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 03:50:45,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 03:50:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 03:50:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 03:50:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 03:50:45,618 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 03:50:45,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:45,618 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 03:50:45,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 03:50:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 03:50:45,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 03:50:45,620 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:45,620 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:45,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:50:45,621 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:45,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:45,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 03:50:45,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:45,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035353885] [2020-08-22 03:50:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 03:50:45,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035353885] [2020-08-22 03:50:45,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:45,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 03:50:45,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400933067] [2020-08-22 03:50:45,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 03:50:45,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:45,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 03:50:45,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:50:46,000 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-22 03:50:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:46,136 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 03:50:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 03:50:46,137 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-22 03:50:46,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:46,138 INFO L225 Difference]: With dead ends: 40 [2020-08-22 03:50:46,139 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 03:50:46,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 03:50:46,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 03:50:46,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 03:50:46,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 03:50:46,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 03:50:46,146 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 03:50:46,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:46,146 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 03:50:46,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 03:50:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 03:50:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 03:50:46,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:46,148 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:46,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:50:46,149 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:46,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 03:50:46,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:46,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873742071] [2020-08-22 03:50:46,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:46,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 03:50:46,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873742071] [2020-08-22 03:50:46,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:46,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 03:50:46,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996498823] [2020-08-22 03:50:46,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 03:50:46,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 03:50:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:50:46,658 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-22 03:50:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:46,815 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 03:50:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 03:50:46,816 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-22 03:50:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:46,818 INFO L225 Difference]: With dead ends: 43 [2020-08-22 03:50:46,818 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 03:50:46,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 03:50:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 03:50:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 03:50:46,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 03:50:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 03:50:46,827 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 03:50:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:46,827 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 03:50:46,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 03:50:46,827 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 03:50:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 03:50:46,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:46,829 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:46,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:50:46,829 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:46,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:46,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 03:50:46,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:46,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740494977] [2020-08-22 03:50:46,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:46,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 03:50:47,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740494977] [2020-08-22 03:50:47,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:47,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 03:50:47,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044773433] [2020-08-22 03:50:47,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 03:50:47,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 03:50:47,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:50:47,357 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-22 03:50:47,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:47,538 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 03:50:47,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 03:50:47,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-22 03:50:47,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:47,540 INFO L225 Difference]: With dead ends: 46 [2020-08-22 03:50:47,540 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 03:50:47,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:50:47,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 03:50:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 03:50:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 03:50:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 03:50:47,547 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 03:50:47,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:47,548 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 03:50:47,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 03:50:47,548 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 03:50:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 03:50:47,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:47,549 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:47,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:50:47,550 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:47,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 03:50:47,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:47,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679970398] [2020-08-22 03:50:47,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:47,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:47,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 03:50:48,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679970398] [2020-08-22 03:50:48,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:48,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 03:50:48,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406380007] [2020-08-22 03:50:48,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 03:50:48,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:48,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 03:50:48,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:50:48,155 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-22 03:50:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:48,372 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 03:50:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 03:50:48,372 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-22 03:50:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:48,374 INFO L225 Difference]: With dead ends: 49 [2020-08-22 03:50:48,374 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 03:50:48,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 03:50:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 03:50:48,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 03:50:48,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 03:50:48,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 03:50:48,381 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 03:50:48,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:48,381 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 03:50:48,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 03:50:48,382 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 03:50:48,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 03:50:48,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:48,383 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:48,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:50:48,383 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 03:50:48,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:48,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123389805] [2020-08-22 03:50:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:48,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:48,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:48,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-08-22 03:50:49,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123389805] [2020-08-22 03:50:49,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:49,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 03:50:49,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062621080] [2020-08-22 03:50:49,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 03:50:49,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:49,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 03:50:49,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:50:49,166 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 25 states. [2020-08-22 03:50:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:49,414 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-08-22 03:50:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 03:50:49,414 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 03:50:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:49,416 INFO L225 Difference]: With dead ends: 52 [2020-08-22 03:50:49,416 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 03:50:49,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-08-22 03:50:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 03:50:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-08-22 03:50:49,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 03:50:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-08-22 03:50:49,430 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-08-22 03:50:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:49,431 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-08-22 03:50:49,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 03:50:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-08-22 03:50:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 03:50:49,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:49,432 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:49,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:50:49,433 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:49,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-08-22 03:50:49,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:49,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280496293] [2020-08-22 03:50:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:49,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-08-22 03:50:50,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280496293] [2020-08-22 03:50:50,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:50,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 03:50:50,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091431868] [2020-08-22 03:50:50,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 03:50:50,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:50,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 03:50:50,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:50:50,289 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 27 states. [2020-08-22 03:50:50,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:50,569 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 03:50:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 03:50:50,569 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-08-22 03:50:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:50,570 INFO L225 Difference]: With dead ends: 55 [2020-08-22 03:50:50,571 INFO L226 Difference]: Without dead ends: 51 [2020-08-22 03:50:50,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2020-08-22 03:50:50,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-22 03:50:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-08-22 03:50:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 03:50:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 03:50:50,577 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-08-22 03:50:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:50,578 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 03:50:50,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 03:50:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 03:50:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 03:50:50,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:50,579 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:50,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:50:50,580 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:50,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:50,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-08-22 03:50:50,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:50,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272366728] [2020-08-22 03:50:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:50,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-08-22 03:50:51,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272366728] [2020-08-22 03:50:51,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:51,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 03:50:51,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276890474] [2020-08-22 03:50:51,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 03:50:51,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:51,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 03:50:51,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:50:51,460 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 29 states. [2020-08-22 03:50:51,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:51,766 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-08-22 03:50:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 03:50:51,767 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 85 [2020-08-22 03:50:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:51,768 INFO L225 Difference]: With dead ends: 58 [2020-08-22 03:50:51,769 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 03:50:51,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2020-08-22 03:50:51,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 03:50:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-08-22 03:50:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 03:50:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 03:50:51,776 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-08-22 03:50:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:51,776 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 03:50:51,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 03:50:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 03:50:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 03:50:51,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:51,777 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:51,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:50:51,778 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-08-22 03:50:51,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:51,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395622304] [2020-08-22 03:50:51,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:51,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:51,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:52,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-08-22 03:50:52,778 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395622304] [2020-08-22 03:50:52,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:52,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 03:50:52,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601608636] [2020-08-22 03:50:52,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 03:50:52,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:52,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 03:50:52,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-22 03:50:52,781 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 31 states. [2020-08-22 03:50:53,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:53,270 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-08-22 03:50:53,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 03:50:53,271 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 91 [2020-08-22 03:50:53,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:53,272 INFO L225 Difference]: With dead ends: 61 [2020-08-22 03:50:53,272 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 03:50:53,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2020-08-22 03:50:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 03:50:53,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-08-22 03:50:53,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 03:50:53,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-08-22 03:50:53,288 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-08-22 03:50:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:53,289 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-08-22 03:50:53,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 03:50:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-08-22 03:50:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 03:50:53,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:53,292 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:53,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:50:53,292 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-08-22 03:50:53,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:53,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [748353263] [2020-08-22 03:50:53,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:53,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:54,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:54,517 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-08-22 03:50:54,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [748353263] [2020-08-22 03:50:54,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:54,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 03:50:54,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126041251] [2020-08-22 03:50:54,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 03:50:54,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:54,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 03:50:54,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:50:54,522 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 33 states. [2020-08-22 03:50:54,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:54,906 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 03:50:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 03:50:54,906 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 97 [2020-08-22 03:50:54,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:54,907 INFO L225 Difference]: With dead ends: 64 [2020-08-22 03:50:54,907 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 03:50:54,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 03:50:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 03:50:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-08-22 03:50:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 03:50:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 03:50:54,913 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-08-22 03:50:54,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:54,914 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 03:50:54,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 03:50:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 03:50:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 03:50:54,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:54,923 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:54,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:50:54,924 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:54,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:54,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-08-22 03:50:54,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:54,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122943975] [2020-08-22 03:50:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:55,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:56,253 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-08-22 03:50:56,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122943975] [2020-08-22 03:50:56,258 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:56,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 03:50:56,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566238661] [2020-08-22 03:50:56,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 03:50:56,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:56,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 03:50:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 03:50:56,261 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 35 states. [2020-08-22 03:50:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:56,864 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-08-22 03:50:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 03:50:56,865 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 103 [2020-08-22 03:50:56,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:56,867 INFO L225 Difference]: With dead ends: 67 [2020-08-22 03:50:56,867 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 03:50:56,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 03:50:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 03:50:56,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-08-22 03:50:56,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 03:50:56,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 03:50:56,888 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-08-22 03:50:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:56,890 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 03:50:56,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 03:50:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 03:50:56,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 03:50:56,892 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:56,895 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:56,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:50:56,895 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:56,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:56,896 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-08-22 03:50:56,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:56,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925056946] [2020-08-22 03:50:56,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:57,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:57,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:58,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:58,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:58,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:58,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-08-22 03:50:58,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925056946] [2020-08-22 03:50:58,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:58,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 03:50:58,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106290788] [2020-08-22 03:50:58,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 03:50:58,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:58,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 03:50:58,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 03:50:58,425 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 37 states. [2020-08-22 03:50:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:59,030 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-08-22 03:50:59,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 03:50:59,032 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 109 [2020-08-22 03:50:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:59,033 INFO L225 Difference]: With dead ends: 70 [2020-08-22 03:50:59,033 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 03:50:59,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 03:50:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 03:50:59,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-08-22 03:50:59,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 03:50:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-08-22 03:50:59,039 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-08-22 03:50:59,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:59,039 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-08-22 03:50:59,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 03:50:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-08-22 03:50:59,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 03:50:59,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:59,041 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:59,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:50:59,041 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:59,042 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-08-22 03:50:59,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:59,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549191981] [2020-08-22 03:50:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:59,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:59,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:50:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-08-22 03:51:00,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549191981] [2020-08-22 03:51:00,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:00,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 03:51:00,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290020320] [2020-08-22 03:51:00,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 03:51:00,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:00,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 03:51:00,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 03:51:00,613 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 39 states. [2020-08-22 03:51:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:01,241 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 03:51:01,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 03:51:01,242 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2020-08-22 03:51:01,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:01,243 INFO L225 Difference]: With dead ends: 73 [2020-08-22 03:51:01,243 INFO L226 Difference]: Without dead ends: 69 [2020-08-22 03:51:01,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 03:51:01,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-22 03:51:01,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-08-22 03:51:01,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 03:51:01,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 03:51:01,249 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-08-22 03:51:01,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:01,249 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 03:51:01,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 03:51:01,249 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 03:51:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 03:51:01,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:01,251 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:01,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:51:01,251 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:01,251 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-08-22 03:51:01,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:01,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722956569] [2020-08-22 03:51:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:01,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-08-22 03:51:02,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722956569] [2020-08-22 03:51:02,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:02,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 03:51:02,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902618628] [2020-08-22 03:51:02,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 03:51:02,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:02,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 03:51:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 03:51:02,933 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 41 states. [2020-08-22 03:51:03,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:03,674 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-08-22 03:51:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 03:51:03,675 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 121 [2020-08-22 03:51:03,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:03,676 INFO L225 Difference]: With dead ends: 76 [2020-08-22 03:51:03,676 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 03:51:03,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 03:51:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 03:51:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-08-22 03:51:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 03:51:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 03:51:03,682 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-08-22 03:51:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:03,682 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 03:51:03,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 03:51:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 03:51:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 03:51:03,684 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:03,684 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:03,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:51:03,685 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:03,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:03,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-08-22 03:51:03,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:03,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361947444] [2020-08-22 03:51:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:03,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:03,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:03,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:03,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:04,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:05,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:05,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:05,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:05,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:05,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-08-22 03:51:05,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361947444] [2020-08-22 03:51:05,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:05,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 03:51:05,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105673660] [2020-08-22 03:51:05,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 03:51:05,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 03:51:05,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 03:51:05,510 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 43 states. [2020-08-22 03:51:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:06,285 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-08-22 03:51:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 03:51:06,289 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 127 [2020-08-22 03:51:06,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:06,290 INFO L225 Difference]: With dead ends: 79 [2020-08-22 03:51:06,290 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 03:51:06,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 03:51:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 03:51:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-08-22 03:51:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 03:51:06,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-08-22 03:51:06,296 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-08-22 03:51:06,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:06,296 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-08-22 03:51:06,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 03:51:06,296 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-08-22 03:51:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-08-22 03:51:06,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:06,298 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:06,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:51:06,298 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:06,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:06,298 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-08-22 03:51:06,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:06,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792189008] [2020-08-22 03:51:06,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:06,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:06,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:07,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:07,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:08,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-08-22 03:51:08,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792189008] [2020-08-22 03:51:08,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:08,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 03:51:08,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861616342] [2020-08-22 03:51:08,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 03:51:08,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:08,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 03:51:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 03:51:08,199 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-08-22 03:51:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:09,110 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-22 03:51:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 03:51:09,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-08-22 03:51:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:09,112 INFO L225 Difference]: With dead ends: 82 [2020-08-22 03:51:09,112 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 03:51:09,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 03:51:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 03:51:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-22 03:51:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 03:51:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 03:51:09,119 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-08-22 03:51:09,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:09,119 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 03:51:09,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 03:51:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 03:51:09,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-08-22 03:51:09,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:09,121 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:09,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 03:51:09,122 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:09,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:09,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-08-22 03:51:09,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:09,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386957901] [2020-08-22 03:51:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:09,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:10,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:11,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-08-22 03:51:11,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386957901] [2020-08-22 03:51:11,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:11,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-08-22 03:51:11,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084527045] [2020-08-22 03:51:11,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 03:51:11,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:11,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 03:51:11,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 03:51:11,272 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 47 states. [2020-08-22 03:51:12,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:12,247 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-08-22 03:51:12,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 03:51:12,250 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 139 [2020-08-22 03:51:12,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:12,251 INFO L225 Difference]: With dead ends: 85 [2020-08-22 03:51:12,251 INFO L226 Difference]: Without dead ends: 81 [2020-08-22 03:51:12,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 03:51:12,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-22 03:51:12,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-08-22 03:51:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 03:51:12,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-22 03:51:12,256 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-08-22 03:51:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:12,257 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-22 03:51:12,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 03:51:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-22 03:51:12,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-08-22 03:51:12,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:12,258 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:12,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 03:51:12,259 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1155535485, now seen corresponding path program 22 times [2020-08-22 03:51:12,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:12,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993112957] [2020-08-22 03:51:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:12,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:13,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:14,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:14,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:14,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:14,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-08-22 03:51:14,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993112957] [2020-08-22 03:51:14,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:14,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 03:51:14,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629559560] [2020-08-22 03:51:14,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 03:51:14,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:14,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 03:51:14,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 03:51:14,786 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 49 states. [2020-08-22 03:51:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:15,893 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-08-22 03:51:15,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 03:51:15,893 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 145 [2020-08-22 03:51:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:15,894 INFO L225 Difference]: With dead ends: 88 [2020-08-22 03:51:15,894 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 03:51:15,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 03:51:15,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 03:51:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-08-22 03:51:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 03:51:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-08-22 03:51:15,906 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-08-22 03:51:15,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:15,906 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-08-22 03:51:15,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 03:51:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-08-22 03:51:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-08-22 03:51:15,910 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:15,910 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:15,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 03:51:15,910 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:15,911 INFO L82 PathProgramCache]: Analyzing trace with hash 478692079, now seen corresponding path program 23 times [2020-08-22 03:51:15,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:15,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525063705] [2020-08-22 03:51:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:15,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:16,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:17,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:18,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-08-22 03:51:18,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525063705] [2020-08-22 03:51:18,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:18,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-08-22 03:51:18,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552546847] [2020-08-22 03:51:18,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 03:51:18,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:18,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 03:51:18,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 03:51:18,417 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 51 states. [2020-08-22 03:51:19,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:19,578 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-22 03:51:19,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 03:51:19,579 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 151 [2020-08-22 03:51:19,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:19,581 INFO L225 Difference]: With dead ends: 91 [2020-08-22 03:51:19,581 INFO L226 Difference]: Without dead ends: 87 [2020-08-22 03:51:19,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 03:51:19,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-22 03:51:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-08-22 03:51:19,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 03:51:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-22 03:51:19,588 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-08-22 03:51:19,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:19,588 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-22 03:51:19,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 03:51:19,589 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-22 03:51:19,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-08-22 03:51:19,590 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:19,590 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:19,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 03:51:19,591 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash -414572547, now seen corresponding path program 24 times [2020-08-22 03:51:19,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:19,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473148669] [2020-08-22 03:51:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:19,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:19,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:19,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:19,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:19,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:19,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:20,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:21,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:22,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-08-22 03:51:22,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473148669] [2020-08-22 03:51:22,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:22,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 03:51:22,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943120603] [2020-08-22 03:51:22,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 03:51:22,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:22,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 03:51:22,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 03:51:22,254 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 53 states. [2020-08-22 03:51:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:23,522 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-08-22 03:51:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 03:51:23,522 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 157 [2020-08-22 03:51:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:23,525 INFO L225 Difference]: With dead ends: 94 [2020-08-22 03:51:23,525 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 03:51:23,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 03:51:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 03:51:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-08-22 03:51:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 03:51:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-22 03:51:23,531 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-08-22 03:51:23,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:23,532 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-22 03:51:23,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 03:51:23,532 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-22 03:51:23,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-08-22 03:51:23,533 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:23,533 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:23,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 03:51:23,534 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:23,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:23,534 INFO L82 PathProgramCache]: Analyzing trace with hash -975000849, now seen corresponding path program 25 times [2020-08-22 03:51:23,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:23,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665338305] [2020-08-22 03:51:23,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:23,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:24,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:25,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:26,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-08-22 03:51:26,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665338305] [2020-08-22 03:51:26,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:26,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-08-22 03:51:26,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439080020] [2020-08-22 03:51:26,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 03:51:26,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:26,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 03:51:26,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 03:51:26,364 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 55 states. [2020-08-22 03:51:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:27,742 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-08-22 03:51:27,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 03:51:27,747 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 163 [2020-08-22 03:51:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:27,748 INFO L225 Difference]: With dead ends: 97 [2020-08-22 03:51:27,749 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 03:51:27,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 03:51:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 03:51:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-08-22 03:51:27,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 03:51:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-08-22 03:51:27,755 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 163 [2020-08-22 03:51:27,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:27,755 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-08-22 03:51:27,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 03:51:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-08-22 03:51:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-08-22 03:51:27,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:27,757 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:27,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 03:51:27,757 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:27,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1466565251, now seen corresponding path program 26 times [2020-08-22 03:51:27,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:27,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618554914] [2020-08-22 03:51:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:27,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:27,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:27,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:27,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:28,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:29,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:30,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-08-22 03:51:30,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618554914] [2020-08-22 03:51:30,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:30,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 03:51:30,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018652744] [2020-08-22 03:51:30,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 03:51:30,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 03:51:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 03:51:30,794 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 57 states. [2020-08-22 03:51:32,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,302 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-22 03:51:32,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 03:51:32,303 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 169 [2020-08-22 03:51:32,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,305 INFO L225 Difference]: With dead ends: 100 [2020-08-22 03:51:32,305 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 03:51:32,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 03:51:32,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 03:51:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-08-22 03:51:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 03:51:32,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-22 03:51:32,312 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 169 [2020-08-22 03:51:32,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,313 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-22 03:51:32,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 03:51:32,313 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-22 03:51:32,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-08-22 03:51:32,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,314 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:32,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 03:51:32,315 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1625096943, now seen corresponding path program 27 times [2020-08-22 03:51:32,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909804245] [2020-08-22 03:51:32,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:32,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:32,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:34,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:35,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-08-22 03:51:35,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909804245] [2020-08-22 03:51:35,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:51:35,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-08-22 03:51:35,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718622403] [2020-08-22 03:51:35,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 03:51:35,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:35,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 03:51:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 03:51:35,670 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 59 states. [2020-08-22 03:51:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:37,303 INFO L93 Difference]: Finished difference Result 103 states and 104 transitions. [2020-08-22 03:51:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 03:51:37,304 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 175 [2020-08-22 03:51:37,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:37,306 INFO L225 Difference]: With dead ends: 103 [2020-08-22 03:51:37,306 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 03:51:37,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 03:51:37,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 03:51:37,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-08-22 03:51:37,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 03:51:37,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-22 03:51:37,312 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 175 [2020-08-22 03:51:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:37,313 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-22 03:51:37,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 03:51:37,313 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-22 03:51:37,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-08-22 03:51:37,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:37,314 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:37,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 03:51:37,315 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1463833859, now seen corresponding path program 28 times [2020-08-22 03:51:37,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:37,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755202461] [2020-08-22 03:51:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:51:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:38,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 03:51:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat