/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 13:01:29,005 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-18 13:01:29,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 13:01:29,057 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 13:01:29,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 13:01:29,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 13:01:29,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 13:01:29,066 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 13:01:29,068 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 13:01:29,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 13:01:29,078 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 13:01:29,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 13:01:29,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 13:01:29,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 13:01:29,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 13:01:29,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 13:01:29,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 13:01:29,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 13:01:29,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 13:01:29,161 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 13:01:29,162 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 13:01:29,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 13:01:29,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 13:01:29,164 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 13:01:29,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 13:01:29,165 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 13:01:29,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 13:01:29,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 13:01:29,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 13:01:29,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 13:01:29,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 13:01:29,167 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 13:01:29,167 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 13:01:29,168 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 13:01:29,168 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 13:01:29,168 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 13:01:29,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 13:01:29,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 13:01:29,169 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 13:01:29,169 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 13:01:29,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:01:29,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 13:01:29,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 13:01:29,170 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 13:01:29,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 13:01:29,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 13:01:29,170 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 13:01:29,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 13:01:29,170 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 13:01:29,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 13:01:29,482 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 13:01:29,486 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 13:01:29,490 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 13:01:29,490 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 13:01:29,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-18 13:01:29,567 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6e2dc44b/a9d7a48be6e3457e856acc6aa09b91cb/FLAGb98db331e [2020-08-18 13:01:30,173 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 13:01:30,173 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem14_label01.c [2020-08-18 13:01:30,192 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6e2dc44b/a9d7a48be6e3457e856acc6aa09b91cb/FLAGb98db331e [2020-08-18 13:01:30,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6e2dc44b/a9d7a48be6e3457e856acc6aa09b91cb [2020-08-18 13:01:30,406 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 13:01:30,408 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 13:01:30,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 13:01:30,411 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 13:01:30,415 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 13:01:30,416 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:01:30" (1/1) ... [2020-08-18 13:01:30,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:30, skipping insertion in model container [2020-08-18 13:01:30,421 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 01:01:30" (1/1) ... [2020-08-18 13:01:30,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 13:01:30,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 13:01:31,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:01:31,266 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 13:01:31,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 13:01:31,416 INFO L208 MainTranslator]: Completed translation [2020-08-18 13:01:31,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31 WrapperNode [2020-08-18 13:01:31,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 13:01:31,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 13:01:31,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 13:01:31,418 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 13:01:31,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... [2020-08-18 13:01:31,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 13:01:31,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 13:01:31,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 13:01:31,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 13:01:31,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 13:01:31,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 13:01:31,615 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 13:01:31,615 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-08-18 13:01:31,616 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 13:01:31,617 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-08-18 13:01:31,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 13:01:31,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 13:01:31,617 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-18 13:01:31,617 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 13:01:31,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 13:01:31,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 13:01:33,148 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 13:01:33,148 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 13:01:33,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:01:33 BoogieIcfgContainer [2020-08-18 13:01:33,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 13:01:33,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 13:01:33,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 13:01:33,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 13:01:33,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 01:01:30" (1/3) ... [2020-08-18 13:01:33,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4b1ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:01:33, skipping insertion in model container [2020-08-18 13:01:33,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 01:01:31" (2/3) ... [2020-08-18 13:01:33,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a4b1ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 01:01:33, skipping insertion in model container [2020-08-18 13:01:33,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 01:01:33" (3/3) ... [2020-08-18 13:01:33,164 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label01.c [2020-08-18 13:01:33,175 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 13:01:33,183 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 13:01:33,197 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 13:01:33,224 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 13:01:33,224 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 13:01:33,225 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 13:01:33,225 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 13:01:33,225 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 13:01:33,225 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 13:01:33,225 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 13:01:33,225 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 13:01:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2020-08-18 13:01:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 13:01:33,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:33,260 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] [2020-08-18 13:01:33,260 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:33,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:33,267 INFO L82 PathProgramCache]: Analyzing trace with hash -184228989, now seen corresponding path program 1 times [2020-08-18 13:01:33,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:33,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978423430] [2020-08-18 13:01:33,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:33,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:33,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:01:33,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978423430] [2020-08-18 13:01:33,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:01:33,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 13:01:33,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681132577] [2020-08-18 13:01:33,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:01:33,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:33,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:01:33,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:01:33,649 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2020-08-18 13:01:36,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:36,539 INFO L93 Difference]: Finished difference Result 886 states and 1612 transitions. [2020-08-18 13:01:36,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 13:01:36,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 60 [2020-08-18 13:01:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:36,562 INFO L225 Difference]: With dead ends: 886 [2020-08-18 13:01:36,562 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 13:01:36,573 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 [2020-08-18 13:01:36,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 13:01:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2020-08-18 13:01:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2020-08-18 13:01:36,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 861 transitions. [2020-08-18 13:01:36,681 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 861 transitions. Word has length 60 [2020-08-18 13:01:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:36,681 INFO L479 AbstractCegarLoop]: Abstraction has 560 states and 861 transitions. [2020-08-18 13:01:36,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:01:36,682 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 861 transitions. [2020-08-18 13:01:36,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-08-18 13:01:36,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:36,691 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] [2020-08-18 13:01:36,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 13:01:36,692 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:36,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2117260534, now seen corresponding path program 1 times [2020-08-18 13:01:36,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:36,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99070115] [2020-08-18 13:01:36,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:36,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:36,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:01:37,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99070115] [2020-08-18 13:01:37,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:01:37,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 13:01:37,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129425497] [2020-08-18 13:01:37,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:01:37,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:37,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:01:37,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:01:37,029 INFO L87 Difference]: Start difference. First operand 560 states and 861 transitions. Second operand 7 states. [2020-08-18 13:01:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:39,075 INFO L93 Difference]: Finished difference Result 1518 states and 2374 transitions. [2020-08-18 13:01:39,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 13:01:39,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 154 [2020-08-18 13:01:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:39,092 INFO L225 Difference]: With dead ends: 1518 [2020-08-18 13:01:39,092 INFO L226 Difference]: Without dead ends: 964 [2020-08-18 13:01:39,095 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 [2020-08-18 13:01:39,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-08-18 13:01:39,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 944. [2020-08-18 13:01:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-08-18 13:01:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1336 transitions. [2020-08-18 13:01:39,165 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1336 transitions. Word has length 154 [2020-08-18 13:01:39,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:39,165 INFO L479 AbstractCegarLoop]: Abstraction has 944 states and 1336 transitions. [2020-08-18 13:01:39,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:01:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1336 transitions. [2020-08-18 13:01:39,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-08-18 13:01:39,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:39,172 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] [2020-08-18 13:01:39,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 13:01:39,173 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:39,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:39,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1698067270, now seen corresponding path program 1 times [2020-08-18 13:01:39,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:39,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290934971] [2020-08-18 13:01:39,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:39,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:39,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:39,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 13:01:39,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290934971] [2020-08-18 13:01:39,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 13:01:39,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 13:01:39,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888646518] [2020-08-18 13:01:39,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:01:39,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:39,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:01:39,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:01:39,519 INFO L87 Difference]: Start difference. First operand 944 states and 1336 transitions. Second operand 8 states. [2020-08-18 13:01:41,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:41,547 INFO L93 Difference]: Finished difference Result 2490 states and 3798 transitions. [2020-08-18 13:01:41,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 13:01:41,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 200 [2020-08-18 13:01:41,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:41,562 INFO L225 Difference]: With dead ends: 2490 [2020-08-18 13:01:41,562 INFO L226 Difference]: Without dead ends: 1552 [2020-08-18 13:01:41,566 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 [2020-08-18 13:01:41,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2020-08-18 13:01:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1518. [2020-08-18 13:01:41,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1518 states. [2020-08-18 13:01:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 2119 transitions. [2020-08-18 13:01:41,650 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 2119 transitions. Word has length 200 [2020-08-18 13:01:41,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:41,652 INFO L479 AbstractCegarLoop]: Abstraction has 1518 states and 2119 transitions. [2020-08-18 13:01:41,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:01:41,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 2119 transitions. [2020-08-18 13:01:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-08-18 13:01:41,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:41,660 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] [2020-08-18 13:01:41,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 13:01:41,660 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 328652488, now seen corresponding path program 1 times [2020-08-18 13:01:41,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:41,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283377541] [2020-08-18 13:01:41,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:41,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:41,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:41,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 13:01:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:42,043 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 106 proven. 71 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 13:01:42,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283377541] [2020-08-18 13:01:42,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:42,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 13:01:42,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461377199] [2020-08-18 13:01:42,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:01:42,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:01:42,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:01:42,047 INFO L87 Difference]: Start difference. First operand 1518 states and 2119 transitions. Second operand 8 states. [2020-08-18 13:01:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:43,918 INFO L93 Difference]: Finished difference Result 3412 states and 4693 transitions. [2020-08-18 13:01:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 13:01:43,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-08-18 13:01:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:43,933 INFO L225 Difference]: With dead ends: 3412 [2020-08-18 13:01:43,933 INFO L226 Difference]: Without dead ends: 1900 [2020-08-18 13:01:43,938 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 [2020-08-18 13:01:43,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2020-08-18 13:01:43,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1890. [2020-08-18 13:01:43,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2020-08-18 13:01:44,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2517 transitions. [2020-08-18 13:01:44,006 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2517 transitions. Word has length 219 [2020-08-18 13:01:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:44,007 INFO L479 AbstractCegarLoop]: Abstraction has 1890 states and 2517 transitions. [2020-08-18 13:01:44,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:01:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2517 transitions. [2020-08-18 13:01:44,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-18 13:01:44,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:44,014 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] [2020-08-18 13:01:44,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 13:01:44,014 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:44,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:44,015 INFO L82 PathProgramCache]: Analyzing trace with hash -56962879, now seen corresponding path program 1 times [2020-08-18 13:01:44,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:44,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423640678] [2020-08-18 13:01:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 13:01:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2020-08-18 13:01:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 193 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-18 13:01:44,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423640678] [2020-08-18 13:01:44,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:44,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:01:44,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927618669] [2020-08-18 13:01:44,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:01:44,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:44,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:01:44,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:01:44,693 INFO L87 Difference]: Start difference. First operand 1890 states and 2517 transitions. Second operand 9 states. [2020-08-18 13:01:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:47,475 INFO L93 Difference]: Finished difference Result 3677 states and 4968 transitions. [2020-08-18 13:01:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 13:01:47,476 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 303 [2020-08-18 13:01:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:47,486 INFO L225 Difference]: With dead ends: 3677 [2020-08-18 13:01:47,487 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 13:01:47,493 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 [2020-08-18 13:01:47,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 13:01:47,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1882. [2020-08-18 13:01:47,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1882 states. [2020-08-18 13:01:47,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 2280 transitions. [2020-08-18 13:01:47,561 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 2280 transitions. Word has length 303 [2020-08-18 13:01:47,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:47,562 INFO L479 AbstractCegarLoop]: Abstraction has 1882 states and 2280 transitions. [2020-08-18 13:01:47,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:01:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 2280 transitions. [2020-08-18 13:01:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-18 13:01:47,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:47,573 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] [2020-08-18 13:01:47,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 13:01:47,574 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:47,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:47,574 INFO L82 PathProgramCache]: Analyzing trace with hash -48667167, now seen corresponding path program 1 times [2020-08-18 13:01:47,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:47,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827218984] [2020-08-18 13:01:47,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:47,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:01:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:01:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:47,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-18 13:01:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:48,195 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 438 proven. 11 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-08-18 13:01:48,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827218984] [2020-08-18 13:01:48,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:48,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:01:48,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416319840] [2020-08-18 13:01:48,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:01:48,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:48,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:01:48,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:01:48,212 INFO L87 Difference]: Start difference. First operand 1882 states and 2280 transitions. Second operand 9 states. [2020-08-18 13:01:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:52,777 INFO L93 Difference]: Finished difference Result 5238 states and 6410 transitions. [2020-08-18 13:01:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 13:01:52,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 438 [2020-08-18 13:01:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:52,796 INFO L225 Difference]: With dead ends: 5238 [2020-08-18 13:01:52,796 INFO L226 Difference]: Without dead ends: 3356 [2020-08-18 13:01:52,801 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 [2020-08-18 13:01:52,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2020-08-18 13:01:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 2438. [2020-08-18 13:01:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2438 states. [2020-08-18 13:01:52,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2438 states to 2438 states and 2779 transitions. [2020-08-18 13:01:52,876 INFO L78 Accepts]: Start accepts. Automaton has 2438 states and 2779 transitions. Word has length 438 [2020-08-18 13:01:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:52,877 INFO L479 AbstractCegarLoop]: Abstraction has 2438 states and 2779 transitions. [2020-08-18 13:01:52,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:01:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2438 states and 2779 transitions. [2020-08-18 13:01:52,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2020-08-18 13:01:52,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:52,891 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] [2020-08-18 13:01:52,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 13:01:52,893 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:52,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:52,893 INFO L82 PathProgramCache]: Analyzing trace with hash -347726080, now seen corresponding path program 1 times [2020-08-18 13:01:52,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:52,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412678169] [2020-08-18 13:01:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:01:53,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:01:53,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-18 13:01:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-18 13:01:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1167 backedges. 668 proven. 209 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-08-18 13:01:53,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412678169] [2020-08-18 13:01:53,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:53,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:01:53,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990045407] [2020-08-18 13:01:53,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:01:53,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:53,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:01:53,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:01:53,953 INFO L87 Difference]: Start difference. First operand 2438 states and 2779 transitions. Second operand 10 states. [2020-08-18 13:01:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:01:57,051 INFO L93 Difference]: Finished difference Result 5701 states and 6650 transitions. [2020-08-18 13:01:57,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 13:01:57,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 558 [2020-08-18 13:01:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:01:57,066 INFO L225 Difference]: With dead ends: 5701 [2020-08-18 13:01:57,067 INFO L226 Difference]: Without dead ends: 3400 [2020-08-18 13:01:57,072 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 [2020-08-18 13:01:57,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-08-18 13:01:57,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3174. [2020-08-18 13:01:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3174 states. [2020-08-18 13:01:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 3495 transitions. [2020-08-18 13:01:57,137 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 3495 transitions. Word has length 558 [2020-08-18 13:01:57,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:01:57,138 INFO L479 AbstractCegarLoop]: Abstraction has 3174 states and 3495 transitions. [2020-08-18 13:01:57,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:01:57,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 3495 transitions. [2020-08-18 13:01:57,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2020-08-18 13:01:57,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:01:57,154 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] [2020-08-18 13:01:57,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 13:01:57,155 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:01:57,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:01:57,155 INFO L82 PathProgramCache]: Analyzing trace with hash -229639858, now seen corresponding path program 1 times [2020-08-18 13:01:57,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:01:57,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352928759] [2020-08-18 13:01:57,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:01:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:57,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:01:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:57,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:01:57,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:57,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:01:57,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:57,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:01:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:57,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-18 13:01:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:01:58,127 INFO L134 CoverageAnalysis]: Checked inductivity of 892 backedges. 439 proven. 136 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2020-08-18 13:01:58,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352928759] [2020-08-18 13:01:58,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:01:58,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:01:58,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700347335] [2020-08-18 13:01:58,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:01:58,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:01:58,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:01:58,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:01:58,130 INFO L87 Difference]: Start difference. First operand 3174 states and 3495 transitions. Second operand 10 states. [2020-08-18 13:01:58,712 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-08-18 13:02:01,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:01,243 INFO L93 Difference]: Finished difference Result 5994 states and 6643 transitions. [2020-08-18 13:02:01,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 13:02:01,243 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 591 [2020-08-18 13:02:01,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:01,257 INFO L225 Difference]: With dead ends: 5994 [2020-08-18 13:02:01,257 INFO L226 Difference]: Without dead ends: 3192 [2020-08-18 13:02:01,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2020-08-18 13:02:01,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3192 states. [2020-08-18 13:02:01,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3192 to 3178. [2020-08-18 13:02:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 13:02:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3486 transitions. [2020-08-18 13:02:01,341 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3486 transitions. Word has length 591 [2020-08-18 13:02:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:01,342 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3486 transitions. [2020-08-18 13:02:01,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:02:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3486 transitions. [2020-08-18 13:02:01,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 702 [2020-08-18 13:02:01,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:01,352 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] [2020-08-18 13:02:01,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 13:02:01,352 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:01,353 INFO L82 PathProgramCache]: Analyzing trace with hash -278736799, now seen corresponding path program 2 times [2020-08-18 13:02:01,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:01,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527691624] [2020-08-18 13:02:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:01,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:01,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 337 [2020-08-18 13:02:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-18 13:02:01,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1384 backedges. 609 proven. 140 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2020-08-18 13:02:02,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527691624] [2020-08-18 13:02:02,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:02,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 13:02:02,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126860004] [2020-08-18 13:02:02,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 13:02:02,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 13:02:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-08-18 13:02:02,627 INFO L87 Difference]: Start difference. First operand 3178 states and 3486 transitions. Second operand 9 states. [2020-08-18 13:02:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:05,095 INFO L93 Difference]: Finished difference Result 6354 states and 6982 transitions. [2020-08-18 13:02:05,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 13:02:05,096 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 701 [2020-08-18 13:02:05,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:05,112 INFO L225 Difference]: With dead ends: 6354 [2020-08-18 13:02:05,112 INFO L226 Difference]: Without dead ends: 3364 [2020-08-18 13:02:05,119 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 [2020-08-18 13:02:05,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3364 states. [2020-08-18 13:02:05,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3364 to 3178. [2020-08-18 13:02:05,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3178 states. [2020-08-18 13:02:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 3484 transitions. [2020-08-18 13:02:05,194 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 3484 transitions. Word has length 701 [2020-08-18 13:02:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:05,195 INFO L479 AbstractCegarLoop]: Abstraction has 3178 states and 3484 transitions. [2020-08-18 13:02:05,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 13:02:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 3484 transitions. [2020-08-18 13:02:05,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2020-08-18 13:02:05,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:05,208 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] [2020-08-18 13:02:05,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 13:02:05,209 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -638310518, now seen corresponding path program 1 times [2020-08-18 13:02:05,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:05,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106553739] [2020-08-18 13:02:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:05,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:05,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:05,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:05,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:05,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:05,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:05,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 477 [2020-08-18 13:02:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1398 backedges. 616 proven. 140 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2020-08-18 13:02:06,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106553739] [2020-08-18 13:02:06,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:06,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 13:02:06,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804387467] [2020-08-18 13:02:06,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 13:02:06,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:06,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 13:02:06,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-08-18 13:02:06,844 INFO L87 Difference]: Start difference. First operand 3178 states and 3484 transitions. Second operand 10 states. [2020-08-18 13:02:09,454 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-08-18 13:02:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:10,352 INFO L93 Difference]: Finished difference Result 6540 states and 7200 transitions. [2020-08-18 13:02:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 13:02:10,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 708 [2020-08-18 13:02:10,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:10,368 INFO L225 Difference]: With dead ends: 6540 [2020-08-18 13:02:10,368 INFO L226 Difference]: Without dead ends: 3552 [2020-08-18 13:02:10,375 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 [2020-08-18 13:02:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2020-08-18 13:02:10,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3548. [2020-08-18 13:02:10,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3548 states. [2020-08-18 13:02:10,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3548 states to 3548 states and 3869 transitions. [2020-08-18 13:02:10,455 INFO L78 Accepts]: Start accepts. Automaton has 3548 states and 3869 transitions. Word has length 708 [2020-08-18 13:02:10,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:10,456 INFO L479 AbstractCegarLoop]: Abstraction has 3548 states and 3869 transitions. [2020-08-18 13:02:10,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 13:02:10,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3548 states and 3869 transitions. [2020-08-18 13:02:10,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 735 [2020-08-18 13:02:10,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:10,467 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] [2020-08-18 13:02:10,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 13:02:10,467 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1537329314, now seen corresponding path program 1 times [2020-08-18 13:02:10,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:10,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142363998] [2020-08-18 13:02:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:10,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:10,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 13:02:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1424 backedges. 763 proven. 2 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-08-18 13:02:11,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142363998] [2020-08-18 13:02:11,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:11,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 13:02:11,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171586506] [2020-08-18 13:02:11,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 13:02:11,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:11,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 13:02:11,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-18 13:02:11,331 INFO L87 Difference]: Start difference. First operand 3548 states and 3869 transitions. Second operand 7 states. [2020-08-18 13:02:12,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:12,804 INFO L93 Difference]: Finished difference Result 8032 states and 8890 transitions. [2020-08-18 13:02:12,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 13:02:12,805 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 734 [2020-08-18 13:02:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:12,834 INFO L225 Difference]: With dead ends: 8032 [2020-08-18 13:02:12,834 INFO L226 Difference]: Without dead ends: 4674 [2020-08-18 13:02:12,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-18 13:02:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2020-08-18 13:02:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 4292. [2020-08-18 13:02:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 13:02:12,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4750 transitions. [2020-08-18 13:02:12,940 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4750 transitions. Word has length 734 [2020-08-18 13:02:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:12,941 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4750 transitions. [2020-08-18 13:02:12,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 13:02:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4750 transitions. [2020-08-18 13:02:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 790 [2020-08-18 13:02:12,953 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:12,953 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] [2020-08-18 13:02:12,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 13:02:12,954 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash -583849898, now seen corresponding path program 1 times [2020-08-18 13:02:12,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:12,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754886077] [2020-08-18 13:02:12,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 425 [2020-08-18 13:02:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-18 13:02:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:13,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 327 proven. 6 refuted. 0 times theorem prover too weak. 1523 trivial. 0 not checked. [2020-08-18 13:02:13,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754886077] [2020-08-18 13:02:13,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:13,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 13:02:13,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114865513] [2020-08-18 13:02:13,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:02:13,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:13,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:02:13,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:02:13,798 INFO L87 Difference]: Start difference. First operand 4292 states and 4750 transitions. Second operand 5 states. [2020-08-18 13:02:15,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:15,032 INFO L93 Difference]: Finished difference Result 4296 states and 4753 transitions. [2020-08-18 13:02:15,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:02:15,032 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 789 [2020-08-18 13:02:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:15,044 INFO L225 Difference]: With dead ends: 4296 [2020-08-18 13:02:15,044 INFO L226 Difference]: Without dead ends: 4294 [2020-08-18 13:02:15,046 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 [2020-08-18 13:02:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2020-08-18 13:02:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 4292. [2020-08-18 13:02:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4292 states. [2020-08-18 13:02:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 4747 transitions. [2020-08-18 13:02:15,125 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 4747 transitions. Word has length 789 [2020-08-18 13:02:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:15,126 INFO L479 AbstractCegarLoop]: Abstraction has 4292 states and 4747 transitions. [2020-08-18 13:02:15,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:02:15,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 4747 transitions. [2020-08-18 13:02:15,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 835 [2020-08-18 13:02:15,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:15,141 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] [2020-08-18 13:02:15,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 13:02:15,141 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1874704500, now seen corresponding path program 1 times [2020-08-18 13:02:15,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:15,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003151614] [2020-08-18 13:02:15,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 13:02:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 13:02:15,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:15,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 13:02:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2386 backedges. 382 proven. 7 refuted. 0 times theorem prover too weak. 1997 trivial. 0 not checked. [2020-08-18 13:02:16,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003151614] [2020-08-18 13:02:16,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:16,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 13:02:16,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305077124] [2020-08-18 13:02:16,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 13:02:16,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:16,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 13:02:16,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 13:02:16,021 INFO L87 Difference]: Start difference. First operand 4292 states and 4747 transitions. Second operand 5 states. [2020-08-18 13:02:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:17,267 INFO L93 Difference]: Finished difference Result 9128 states and 10168 transitions. [2020-08-18 13:02:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 13:02:17,268 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 834 [2020-08-18 13:02:17,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:17,281 INFO L225 Difference]: With dead ends: 9128 [2020-08-18 13:02:17,281 INFO L226 Difference]: Without dead ends: 5026 [2020-08-18 13:02:17,294 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 [2020-08-18 13:02:17,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5026 states. [2020-08-18 13:02:17,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5026 to 3918. [2020-08-18 13:02:17,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3918 states. [2020-08-18 13:02:17,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 4287 transitions. [2020-08-18 13:02:17,368 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 4287 transitions. Word has length 834 [2020-08-18 13:02:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:17,370 INFO L479 AbstractCegarLoop]: Abstraction has 3918 states and 4287 transitions. [2020-08-18 13:02:17,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 13:02:17,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 4287 transitions. [2020-08-18 13:02:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2020-08-18 13:02:17,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 13:02:17,384 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] [2020-08-18 13:02:17,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 13:02:17,384 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 13:02:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 13:02:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash -177347705, now seen corresponding path program 1 times [2020-08-18 13:02:17,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 13:02:17,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548810989] [2020-08-18 13:02:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 13:02:17,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 13:02:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-08-18 13:02:17,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 13:02:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2020-08-18 13:02:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-18 13:02:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 503 [2020-08-18 13:02:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-18 13:02:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:17,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-18 13:02:17,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 13:02:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2441 backedges. 379 proven. 28 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2020-08-18 13:02:18,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548810989] [2020-08-18 13:02:18,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 13:02:18,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 13:02:18,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50250735] [2020-08-18 13:02:18,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 13:02:18,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 13:02:18,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 13:02:18,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-18 13:02:18,342 INFO L87 Difference]: Start difference. First operand 3918 states and 4287 transitions. Second operand 8 states. [2020-08-18 13:02:21,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 13:02:21,408 INFO L93 Difference]: Finished difference Result 5032 states and 5532 transitions. [2020-08-18 13:02:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 13:02:21,410 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 845 [2020-08-18 13:02:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 13:02:21,412 INFO L225 Difference]: With dead ends: 5032 [2020-08-18 13:02:21,412 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 13:02:21,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-08-18 13:02:21,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 13:02:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 13:02:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 13:02:21,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 13:02:21,420 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 845 [2020-08-18 13:02:21,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 13:02:21,421 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 13:02:21,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 13:02:21,421 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 13:02:21,421 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 13:02:21,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 13:02:21,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 13:02:21,994 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-18 13:02:22,230 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 200 DAG size of output: 177 [2020-08-18 13:02:23,880 WARN L193 SmtUtils]: Spent 1.52 s on a formula simplification. DAG size of input: 250 DAG size of output: 61 [2020-08-18 13:02:24,897 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 55