/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:15:27,943 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 22:15:27,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:15:27,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:15:28,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:15:28,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:15:28,009 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:15:28,010 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:15:28,011 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:15:28,012 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:15:28,012 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:15:28,013 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:15:28,014 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:15:28,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:15:28,016 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:15:28,017 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:15:28,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:15:28,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:15:28,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:15:28,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:15:28,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:15:28,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:15:28,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:15:28,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:15:28,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:15:28,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:15:28,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 22:15:28,064 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:15:28,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:15:28,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:15:28,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:15:28,068 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:15:28,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:15:28,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:15:28,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:15:28,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:15:28,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:15:28,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:15:28,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:15:28,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:15:28,072 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:15:28,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:15:28,072 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:15:28,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:15:28,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:15:28,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:15:28,073 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:15:28,073 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:15:28,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:15:28,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:15:28,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:15:28,074 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:15:28,074 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:15:28,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:15:28,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:15:28,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:15:28,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:15:28,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:15:28,422 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:15:28,426 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:15:28,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:15:28,428 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:15:28,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-21 22:15:28,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d8a8e243/af2867a0737f4eccad958e47c1eb38b5/FLAG878adc782 [2020-08-21 22:15:29,116 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:15:29,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-21 22:15:29,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d8a8e243/af2867a0737f4eccad958e47c1eb38b5/FLAG878adc782 [2020-08-21 22:15:29,347 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8d8a8e243/af2867a0737f4eccad958e47c1eb38b5 [2020-08-21 22:15:29,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:15:29,360 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:15:29,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:15:29,362 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:15:29,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:15:29,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:15:29" (1/1) ... [2020-08-21 22:15:29,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7730d90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:29, skipping insertion in model container [2020-08-21 22:15:29,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:15:29" (1/1) ... [2020-08-21 22:15:29,379 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:15:29,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:15:29,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:15:29,977 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:15:30,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:15:30,113 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:15:30,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30 WrapperNode [2020-08-21 22:15:30,115 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:15:30,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:15:30,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:15:30,116 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:15:30,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... [2020-08-21 22:15:30,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:15:30,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:15:30,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:15:30,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:15:30,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:15:30,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:15:30,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:15:30,325 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-21 22:15:30,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:15:30,325 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-21 22:15:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:15:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:15:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-21 22:15:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:15:30,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:15:30,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:15:31,787 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:15:31,787 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 22:15:31,794 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:15:31 BoogieIcfgContainer [2020-08-21 22:15:31,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:15:31,796 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:15:31,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:15:31,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:15:31,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:15:29" (1/3) ... [2020-08-21 22:15:31,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339791f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:15:31, skipping insertion in model container [2020-08-21 22:15:31,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:15:30" (2/3) ... [2020-08-21 22:15:31,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339791f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:15:31, skipping insertion in model container [2020-08-21 22:15:31,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:15:31" (3/3) ... [2020-08-21 22:15:31,803 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-21 22:15:31,813 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:15:31,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:15:31,834 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:15:31,862 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:15:31,862 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:15:31,862 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:15:31,863 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:15:31,863 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:15:31,863 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:15:31,863 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:15:31,864 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:15:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-21 22:15:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-21 22:15:31,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:31,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:31,897 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:31,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:31,903 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-21 22:15:31,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:31,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288679899] [2020-08-21 22:15:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:32,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:15:32,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288679899] [2020-08-21 22:15:32,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:15:32,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:15:32,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118060717] [2020-08-21 22:15:32,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:15:32,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:32,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:15:32,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:15:32,350 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-21 22:15:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:35,234 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-21 22:15:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:15:35,235 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-21 22:15:35,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:35,256 INFO L225 Difference]: With dead ends: 886 [2020-08-21 22:15:35,256 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 22:15:35,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:15:35,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 22:15:35,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-21 22:15:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-21 22:15:35,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-21 22:15:35,372 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-21 22:15:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:35,372 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-21 22:15:35,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:15:35,374 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-21 22:15:35,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-21 22:15:35,388 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:35,388 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:35,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:15:35,389 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:35,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:35,389 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-21 22:15:35,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:35,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92520201] [2020-08-21 22:15:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:35,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:35,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:35,781 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:15:35,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92520201] [2020-08-21 22:15:35,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:15:35,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:15:35,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711426256] [2020-08-21 22:15:35,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:15:35,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:15:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:15:35,787 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-21 22:15:37,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:37,843 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-21 22:15:37,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:15:37,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-21 22:15:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:37,854 INFO L225 Difference]: With dead ends: 1518 [2020-08-21 22:15:37,854 INFO L226 Difference]: Without dead ends: 964 [2020-08-21 22:15:37,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:15:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-21 22:15:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-21 22:15:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-21 22:15:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-21 22:15:37,920 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-21 22:15:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:37,921 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-21 22:15:37,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:15:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-21 22:15:37,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-21 22:15:37,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:37,928 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:37,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:15:37,929 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-21 22:15:37,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:37,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923326803] [2020-08-21 22:15:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:38,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:38,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:15:38,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923326803] [2020-08-21 22:15:38,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:15:38,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:15:38,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746174563] [2020-08-21 22:15:38,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:15:38,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:38,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:15:38,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:15:38,246 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-21 22:15:40,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:40,232 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-21 22:15:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:15:40,234 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-21 22:15:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:40,254 INFO L225 Difference]: With dead ends: 2490 [2020-08-21 22:15:40,255 INFO L226 Difference]: Without dead ends: 1552 [2020-08-21 22:15:40,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:15:40,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-21 22:15:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-21 22:15:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-21 22:15:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-21 22:15:40,348 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-21 22:15:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:40,351 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-21 22:15:40,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:15:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-21 22:15:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-21 22:15:40,364 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:40,364 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:40,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:15:40,365 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:40,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-21 22:15:40,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:40,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635985518] [2020-08-21 22:15:40,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:40,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:40,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:40,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-21 22:15:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 22:15:40,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635985518] [2020-08-21 22:15:40,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:15:40,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:15:40,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068881753] [2020-08-21 22:15:40,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:15:40,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:40,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:15:40,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:15:40,757 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-21 22:15:42,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:42,529 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-21 22:15:42,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:15:42,530 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-21 22:15:42,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:42,542 INFO L225 Difference]: With dead ends: 3412 [2020-08-21 22:15:42,543 INFO L226 Difference]: Without dead ends: 1900 [2020-08-21 22:15:42,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:15:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-21 22:15:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-21 22:15:42,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-21 22:15:42,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-21 22:15:42,605 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-21 22:15:42,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:42,606 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-21 22:15:42,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:15:42,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-21 22:15:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-21 22:15:42,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:42,613 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:42,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:15:42,614 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:42,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:42,614 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-21 22:15:42,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:42,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600696184] [2020-08-21 22:15:42,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:42,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:42,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:42,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:42,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-21 22:15:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:42,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-21 22:15:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:43,151 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 22:15:43,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600696184] [2020-08-21 22:15:43,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:15:43,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:15:43,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032511044] [2020-08-21 22:15:43,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:15:43,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:43,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:15:43,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:15:43,154 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-21 22:15:45,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:45,710 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-21 22:15:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:15:45,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-21 22:15:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:45,722 INFO L225 Difference]: With dead ends: 3677 [2020-08-21 22:15:45,722 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 22:15:45,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:15:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 22:15:45,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-21 22:15:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-21 22:15:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-21 22:15:45,783 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-21 22:15:45,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:45,784 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-21 22:15:45,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:15:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-21 22:15:45,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-21 22:15:45,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:45,795 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:45,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:15:45,795 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:45,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:45,796 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-21 22:15:45,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:45,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265662654] [2020-08-21 22:15:45,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:45,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:45,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:46,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:46,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:15:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:46,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:15:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:46,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-21 22:15:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-21 22:15:46,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265662654] [2020-08-21 22:15:46,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:15:46,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:15:46,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771405040] [2020-08-21 22:15:46,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:15:46,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:15:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:15:46,437 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-21 22:15:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:51,038 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-21 22:15:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 22:15:51,044 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-21 22:15:51,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:51,062 INFO L225 Difference]: With dead ends: 5238 [2020-08-21 22:15:51,062 INFO L226 Difference]: Without dead ends: 3356 [2020-08-21 22:15:51,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2020-08-21 22:15:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-21 22:15:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-21 22:15:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-21 22:15:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-21 22:15:51,139 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-21 22:15:51,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:51,140 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-21 22:15:51,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:15:51,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-21 22:15:51,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-21 22:15:51,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:51,154 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:51,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:15:51,154 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:51,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:51,155 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-21 22:15:51,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:51,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949304549] [2020-08-21 22:15:51,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:51,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:51,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:15:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:51,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:15:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:51,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-21 22:15:51,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-21 22:15:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:52,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-21 22:15:52,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949304549] [2020-08-21 22:15:52,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:15:52,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:15:52,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284733518] [2020-08-21 22:15:52,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:15:52,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:52,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:15:52,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:15:52,725 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-21 22:15:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:15:55,813 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-21 22:15:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:15:55,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-21 22:15:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:15:55,827 INFO L225 Difference]: With dead ends: 5701 [2020-08-21 22:15:55,827 INFO L226 Difference]: Without dead ends: 3400 [2020-08-21 22:15:55,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:15:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-21 22:15:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-21 22:15:55,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-21 22:15:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-21 22:15:55,916 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-21 22:15:55,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:15:55,917 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-21 22:15:55,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:15:55,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-21 22:15:55,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-21 22:15:55,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:15:55,924 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:15:55,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:15:55,925 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:15:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:15:55,926 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-21 22:15:55,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:15:55,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775981740] [2020-08-21 22:15:55,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:15:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:56,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:15:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:56,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:15:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:56,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:15:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:56,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:15:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:56,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-21 22:15:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:15:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-21 22:15:57,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775981740] [2020-08-21 22:15:57,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:15:57,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:15:57,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196885793] [2020-08-21 22:15:57,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:15:57,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:15:57,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:15:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:15:57,414 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-21 22:16:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:00,446 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-21 22:16:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:16:00,447 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-21 22:16:00,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:00,462 INFO L225 Difference]: With dead ends: 5994 [2020-08-21 22:16:00,462 INFO L226 Difference]: Without dead ends: 3192 [2020-08-21 22:16:00,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-21 22:16:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-21 22:16:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-21 22:16:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 22:16:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-21 22:16:00,550 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-21 22:16:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:00,551 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-21 22:16:00,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:16:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-21 22:16:00,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-21 22:16:00,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:16:00,561 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:16:00,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:16:00,564 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:16:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:16:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-21 22:16:00,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:16:00,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349400694] [2020-08-21 22:16:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:16:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:00,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:16:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:00,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:16:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:00,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:16:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:00,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:16:00,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:00,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-21 22:16:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:01,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-21 22:16:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-21 22:16:02,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349400694] [2020-08-21 22:16:02,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:16:02,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:16:02,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70256215] [2020-08-21 22:16:02,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:16:02,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:16:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:16:02,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:16:02,095 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-21 22:16:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:04,513 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-21 22:16:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:16:04,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-21 22:16:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:04,529 INFO L225 Difference]: With dead ends: 6354 [2020-08-21 22:16:04,529 INFO L226 Difference]: Without dead ends: 3364 [2020-08-21 22:16:04,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:16:04,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-21 22:16:04,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-21 22:16:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-21 22:16:04,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-21 22:16:04,611 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-21 22:16:04,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:04,612 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-21 22:16:04,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:16:04,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-21 22:16:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-21 22:16:04,622 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:16:04,623 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:16:04,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:16:04,623 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:16:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:16:04,624 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-21 22:16:04,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:16:04,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130815700] [2020-08-21 22:16:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:16:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:04,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:16:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:04,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:16:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:04,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:16:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:04,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:16:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:05,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 22:16:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:05,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-21 22:16:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-21 22:16:05,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130815700] [2020-08-21 22:16:05,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:16:05,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:16:05,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299745470] [2020-08-21 22:16:05,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:16:05,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:16:05,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:16:05,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:16:05,801 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-21 22:16:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:09,327 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-21 22:16:09,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 22:16:09,328 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-21 22:16:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:09,342 INFO L225 Difference]: With dead ends: 6540 [2020-08-21 22:16:09,342 INFO L226 Difference]: Without dead ends: 3552 [2020-08-21 22:16:09,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2020-08-21 22:16:09,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-21 22:16:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-21 22:16:09,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-21 22:16:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-21 22:16:09,424 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-21 22:16:09,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:09,425 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-21 22:16:09,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:16:09,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-21 22:16:09,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-21 22:16:09,434 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:16:09,435 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:16:09,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:16:09,435 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:16:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:16:09,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-21 22:16:09,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:16:09,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525363687] [2020-08-21 22:16:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:16:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:09,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:16:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:09,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:16:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:16:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:16:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:09,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 22:16:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:09,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 22:16:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-21 22:16:10,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525363687] [2020-08-21 22:16:10,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:16:10,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:16:10,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768460850] [2020-08-21 22:16:10,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:16:10,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:16:10,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:16:10,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:16:10,579 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-21 22:16:11,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:11,995 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-21 22:16:11,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:16:11,996 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-21 22:16:11,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:12,027 INFO L225 Difference]: With dead ends: 8032 [2020-08-21 22:16:12,027 INFO L226 Difference]: Without dead ends: 4674 [2020-08-21 22:16:12,036 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:16:12,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-21 22:16:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-21 22:16:12,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-21 22:16:12,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-21 22:16:12,130 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-21 22:16:12,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:12,131 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-21 22:16:12,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:16:12,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-21 22:16:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-21 22:16:12,142 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:16:12,143 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:16:12,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:16:12,143 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:16:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:16:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-21 22:16:12,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:16:12,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156520940] [2020-08-21 22:16:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:16:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:16:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:16:12,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:16:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:16:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 22:16:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-21 22:16:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:12,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-21 22:16:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:13,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-21 22:16:13,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156520940] [2020-08-21 22:16:13,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:16:13,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 22:16:13,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343821298] [2020-08-21 22:16:13,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:16:13,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:16:13,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:16:13,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:16:13,015 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-21 22:16:14,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:14,319 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-21 22:16:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:16:14,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-21 22:16:14,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:14,332 INFO L225 Difference]: With dead ends: 4296 [2020-08-21 22:16:14,333 INFO L226 Difference]: Without dead ends: 4294 [2020-08-21 22:16:14,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:16:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-21 22:16:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-21 22:16:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-21 22:16:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-21 22:16:14,413 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-21 22:16:14,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:14,414 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-21 22:16:14,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:16:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-21 22:16:14,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-21 22:16:14,428 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:16:14,429 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:16:14,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:16:14,429 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:16:14,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:16:14,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-21 22:16:14,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:16:14,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811675170] [2020-08-21 22:16:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:16:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:16:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:16:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:16:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:16:14,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 22:16:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 22:16:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-21 22:16:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:14,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-21 22:16:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-21 22:16:15,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811675170] [2020-08-21 22:16:15,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:16:15,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 22:16:15,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362935750] [2020-08-21 22:16:15,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:16:15,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:16:15,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:16:15,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:16:15,446 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-21 22:16:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:16,693 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-21 22:16:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:16:16,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-21 22:16:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:16,707 INFO L225 Difference]: With dead ends: 9128 [2020-08-21 22:16:16,707 INFO L226 Difference]: Without dead ends: 5026 [2020-08-21 22:16:16,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:16:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-21 22:16:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-21 22:16:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-21 22:16:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-21 22:16:16,788 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-21 22:16:16,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:16,789 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-21 22:16:16,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:16:16,789 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-21 22:16:16,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-21 22:16:16,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:16:16,803 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:16:16,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:16:16,803 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:16:16,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:16:16,804 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-21 22:16:16,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:16:16,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482102724] [2020-08-21 22:16:16,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:16:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:16:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-21 22:16:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-21 22:16:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-21 22:16:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-21 22:16:17,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-21 22:16:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-21 22:16:17,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-21 22:16:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:16:17,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-21 22:16:17,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482102724] [2020-08-21 22:16:17,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:16:17,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:16:17,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914937896] [2020-08-21 22:16:17,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:16:17,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:16:17,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:16:17,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:16:17,589 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states. [2020-08-21 22:16:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:16:20,679 INFO L93 Difference]: Finished difference Result 5032 states and 5532 transitions. [2020-08-21 22:16:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:16:20,687 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 845 [2020-08-21 22:16:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:16:20,688 INFO L225 Difference]: With dead ends: 5032 [2020-08-21 22:16:20,688 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:16:20,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-08-21 22:16:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:16:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:16:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:16:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:16:20,696 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 845 [2020-08-21 22:16:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:16:20,696 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:16:20,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:16:20,696 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:16:20,696 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:16:20,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:16:20,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:16:21,241 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-21 22:16:21,422 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-21 22:16:22,917 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 250 DAG size of output: 61 [2020-08-21 22:16:23,899 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 55