/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:03:41,653 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:03:41,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:03:41,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:03:41,699 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:03:41,701 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:03:41,702 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:03:41,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:03:41,705 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:03:41,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:03:41,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:03:41,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:03:41,717 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:03:41,718 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:03:41,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:03:41,739 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:03:41,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:03:41,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:03:41,751 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 [2020-09-24 15:03:41,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:03:41,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:03:41,808 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:03:41,808 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:03:41,808 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:03:41,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:03:41,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:03:41,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:03:41,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:03:41,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:03:41,811 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:03:41,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:03:41,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:03:41,812 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:03:41,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:03:41,813 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:03:41,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:03:41,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:03:41,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:03:41,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:03:41,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:03:41,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:03:41,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:03:41,814 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:03:41,814 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:03:41,815 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:03:41,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:03:41,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:03:41,815 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:03:41,815 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.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 15:03:42,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:03:42,332 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:03:42,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:03:42,340 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:03:42,341 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:03:42,342 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-09-24 15:03:42,433 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0dbed3bf/4386472a305b46c38c06b81a5ae649ad/FLAG7a6e36aef [2020-09-24 15:03:43,096 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:03:43,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label45.c [2020-09-24 15:03:43,112 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0dbed3bf/4386472a305b46c38c06b81a5ae649ad/FLAG7a6e36aef [2020-09-24 15:03:43,380 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0dbed3bf/4386472a305b46c38c06b81a5ae649ad [2020-09-24 15:03:43,396 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:03:43,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:03:43,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:43,409 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:03:43,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:03:43,414 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:43" (1/1) ... [2020-09-24 15:03:43,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e06715f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:43, skipping insertion in model container [2020-09-24 15:03:43,420 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:43" (1/1) ... [2020-09-24 15:03:43,431 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:03:43,504 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:03:44,103 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:44,115 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:03:44,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:44,251 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:03:44,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44 WrapperNode [2020-09-24 15:03:44,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:44,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:03:44,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:03:44,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:03:44,268 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,269 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,330 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (1/1) ... [2020-09-24 15:03:44,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:03:44,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:03:44,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:03:44,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:03:44,368 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (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 [2020-09-24 15:03:44,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:03:44,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:03:44,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:03:44,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:03:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:03:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:03:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:03:44,486 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:03:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:03:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:03:44,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:03:46,149 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:03:46,149 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:03:46,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:46 BoogieIcfgContainer [2020-09-24 15:03:46,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:03:46,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:03:46,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:03:46,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:03:46,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:03:43" (1/3) ... [2020-09-24 15:03:46,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc56e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:46, skipping insertion in model container [2020-09-24 15:03:46,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:44" (2/3) ... [2020-09-24 15:03:46,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc56e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:46, skipping insertion in model container [2020-09-24 15:03:46,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:46" (3/3) ... [2020-09-24 15:03:46,171 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label45.c [2020-09-24 15:03:46,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:03:46,193 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:03:46,213 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:03:46,246 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:03:46,246 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:03:46,246 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:03:46,247 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:03:46,247 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:03:46,247 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:03:46,247 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:03:46,247 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:03:46,280 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 15:03:46,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-09-24 15:03:46,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:46,292 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] [2020-09-24 15:03:46,292 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:46,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:46,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1037847345, now seen corresponding path program 1 times [2020-09-24 15:03:46,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:46,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098141790] [2020-09-24 15:03:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:46,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:46,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098141790] [2020-09-24 15:03:46,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:46,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 15:03:46,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723594442] [2020-09-24 15:03:46,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:03:46,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:46,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:03:46,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:03:46,844 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 5 states. [2020-09-24 15:03:49,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:49,510 INFO L93 Difference]: Finished difference Result 1226 states and 1797 transitions. [2020-09-24 15:03:49,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 15:03:49,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-09-24 15:03:49,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:49,547 INFO L225 Difference]: With dead ends: 1226 [2020-09-24 15:03:49,548 INFO L226 Difference]: Without dead ends: 707 [2020-09-24 15:03:49,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2020-09-24 15:03:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 695. [2020-09-24 15:03:49,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 695 states. [2020-09-24 15:03:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 926 transitions. [2020-09-24 15:03:49,672 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 926 transitions. Word has length 57 [2020-09-24 15:03:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:49,673 INFO L479 AbstractCegarLoop]: Abstraction has 695 states and 926 transitions. [2020-09-24 15:03:49,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:03:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 926 transitions. [2020-09-24 15:03:49,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 15:03:49,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:49,683 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:49,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:03:49,684 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:49,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:49,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1358485705, now seen corresponding path program 1 times [2020-09-24 15:03:49,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:49,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293312392] [2020-09-24 15:03:49,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:49,989 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:49,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293312392] [2020-09-24 15:03:49,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:49,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:03:49,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431027518] [2020-09-24 15:03:49,993 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:49,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:49,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:49,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:49,995 INFO L87 Difference]: Start difference. First operand 695 states and 926 transitions. Second operand 8 states. [2020-09-24 15:03:52,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:52,250 INFO L93 Difference]: Finished difference Result 1559 states and 2130 transitions. [2020-09-24 15:03:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:03:52,252 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2020-09-24 15:03:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:52,261 INFO L225 Difference]: With dead ends: 1559 [2020-09-24 15:03:52,262 INFO L226 Difference]: Without dead ends: 879 [2020-09-24 15:03:52,267 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:03:52,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2020-09-24 15:03:52,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 853. [2020-09-24 15:03:52,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 853 states. [2020-09-24 15:03:52,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 1090 transitions. [2020-09-24 15:03:52,336 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 1090 transitions. Word has length 140 [2020-09-24 15:03:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:52,339 INFO L479 AbstractCegarLoop]: Abstraction has 853 states and 1090 transitions. [2020-09-24 15:03:52,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 1090 transitions. [2020-09-24 15:03:52,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 15:03:52,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:52,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:52,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:03:52,351 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:52,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:52,352 INFO L82 PathProgramCache]: Analyzing trace with hash -861467326, now seen corresponding path program 1 times [2020-09-24 15:03:52,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:52,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040037118] [2020-09-24 15:03:52,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:52,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:52,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:52,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:52,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:52,740 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:52,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040037118] [2020-09-24 15:03:52,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:52,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:03:52,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357700755] [2020-09-24 15:03:52,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:52,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:52,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:52,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:52,743 INFO L87 Difference]: Start difference. First operand 853 states and 1090 transitions. Second operand 8 states. [2020-09-24 15:03:55,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:55,805 INFO L93 Difference]: Finished difference Result 2974 states and 4113 transitions. [2020-09-24 15:03:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:03:55,808 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 146 [2020-09-24 15:03:55,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:55,829 INFO L225 Difference]: With dead ends: 2974 [2020-09-24 15:03:55,829 INFO L226 Difference]: Without dead ends: 2136 [2020-09-24 15:03:55,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-09-24 15:03:55,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2020-09-24 15:03:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 1839. [2020-09-24 15:03:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1839 states. [2020-09-24 15:03:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2431 transitions. [2020-09-24 15:03:55,945 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2431 transitions. Word has length 146 [2020-09-24 15:03:55,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:55,947 INFO L479 AbstractCegarLoop]: Abstraction has 1839 states and 2431 transitions. [2020-09-24 15:03:55,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2431 transitions. [2020-09-24 15:03:55,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-09-24 15:03:55,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:55,951 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:55,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:03:55,951 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:55,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:55,952 INFO L82 PathProgramCache]: Analyzing trace with hash 444399112, now seen corresponding path program 1 times [2020-09-24 15:03:55,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:55,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240908443] [2020-09-24 15:03:55,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:56,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:56,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:56,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:56,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:56,330 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:56,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240908443] [2020-09-24 15:03:56,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:56,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:03:56,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6762041] [2020-09-24 15:03:56,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:03:56,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:56,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:03:56,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:56,337 INFO L87 Difference]: Start difference. First operand 1839 states and 2431 transitions. Second operand 7 states. [2020-09-24 15:03:58,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:58,559 INFO L93 Difference]: Finished difference Result 4381 states and 5914 transitions. [2020-09-24 15:03:58,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 15:03:58,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 155 [2020-09-24 15:03:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:58,573 INFO L225 Difference]: With dead ends: 4381 [2020-09-24 15:03:58,573 INFO L226 Difference]: Without dead ends: 2557 [2020-09-24 15:03:58,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:03:58,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2020-09-24 15:03:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2044. [2020-09-24 15:03:58,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2020-09-24 15:03:58,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 2741 transitions. [2020-09-24 15:03:58,659 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 2741 transitions. Word has length 155 [2020-09-24 15:03:58,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:58,660 INFO L479 AbstractCegarLoop]: Abstraction has 2044 states and 2741 transitions. [2020-09-24 15:03:58,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:03:58,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 2741 transitions. [2020-09-24 15:03:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-09-24 15:03:58,664 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:58,664 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:03:58,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:03:58,665 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:58,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:58,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1882471934, now seen corresponding path program 1 times [2020-09-24 15:03:58,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:58,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146777101] [2020-09-24 15:03:58,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:58,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146777101] [2020-09-24 15:03:58,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:58,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:03:58,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380372278] [2020-09-24 15:03:58,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:58,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:58,953 INFO L87 Difference]: Start difference. First operand 2044 states and 2741 transitions. Second operand 8 states. [2020-09-24 15:04:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:02,174 INFO L93 Difference]: Finished difference Result 5813 states and 8107 transitions. [2020-09-24 15:04:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 15:04:02,175 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 179 [2020-09-24 15:04:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:02,195 INFO L225 Difference]: With dead ends: 5813 [2020-09-24 15:04:02,196 INFO L226 Difference]: Without dead ends: 3934 [2020-09-24 15:04:02,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2020-09-24 15:04:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3934 states. [2020-09-24 15:04:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3934 to 3580. [2020-09-24 15:04:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3580 states. [2020-09-24 15:04:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 4673 transitions. [2020-09-24 15:04:02,316 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 4673 transitions. Word has length 179 [2020-09-24 15:04:02,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:02,316 INFO L479 AbstractCegarLoop]: Abstraction has 3580 states and 4673 transitions. [2020-09-24 15:04:02,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:04:02,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 4673 transitions. [2020-09-24 15:04:02,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-09-24 15:04:02,323 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:02,324 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, 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] [2020-09-24 15:04:02,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:04:02,324 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:02,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:02,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1687252463, now seen corresponding path program 1 times [2020-09-24 15:04:02,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:02,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213393314] [2020-09-24 15:04:02,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:02,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:02,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:02,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:02,653 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 148 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:04:02,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213393314] [2020-09-24 15:04:02,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:02,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 15:04:02,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669194972] [2020-09-24 15:04:02,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 15:04:02,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:02,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 15:04:02,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:02,664 INFO L87 Difference]: Start difference. First operand 3580 states and 4673 transitions. Second operand 10 states. [2020-09-24 15:04:07,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:07,777 INFO L93 Difference]: Finished difference Result 8725 states and 11428 transitions. [2020-09-24 15:04:07,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:04:07,782 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 225 [2020-09-24 15:04:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:07,814 INFO L225 Difference]: With dead ends: 8725 [2020-09-24 15:04:07,814 INFO L226 Difference]: Without dead ends: 5310 [2020-09-24 15:04:07,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2020-09-24 15:04:07,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2020-09-24 15:04:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 3942. [2020-09-24 15:04:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3942 states. [2020-09-24 15:04:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 4869 transitions. [2020-09-24 15:04:07,951 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 4869 transitions. Word has length 225 [2020-09-24 15:04:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:07,952 INFO L479 AbstractCegarLoop]: Abstraction has 3942 states and 4869 transitions. [2020-09-24 15:04:07,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 15:04:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 4869 transitions. [2020-09-24 15:04:07,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2020-09-24 15:04:07,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:07,967 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:07,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:04:07,968 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:07,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:07,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1962116336, now seen corresponding path program 1 times [2020-09-24 15:04:07,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:07,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003358974] [2020-09-24 15:04:07,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:08,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:08,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:08,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:08,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2020-09-24 15:04:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 206 proven. 73 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-24 15:04:08,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003358974] [2020-09-24 15:04:08,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:08,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:08,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480088623] [2020-09-24 15:04:08,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:08,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:08,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:08,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:08,475 INFO L87 Difference]: Start difference. First operand 3942 states and 4869 transitions. Second operand 7 states. [2020-09-24 15:04:10,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:10,789 INFO L93 Difference]: Finished difference Result 7909 states and 9804 transitions. [2020-09-24 15:04:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:04:10,790 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 308 [2020-09-24 15:04:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:10,808 INFO L225 Difference]: With dead ends: 7909 [2020-09-24 15:04:10,809 INFO L226 Difference]: Without dead ends: 4132 [2020-09-24 15:04:10,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-09-24 15:04:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4132 states. [2020-09-24 15:04:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4132 to 3495. [2020-09-24 15:04:10,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3495 states. [2020-09-24 15:04:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 4273 transitions. [2020-09-24 15:04:10,921 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 4273 transitions. Word has length 308 [2020-09-24 15:04:10,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:10,921 INFO L479 AbstractCegarLoop]: Abstraction has 3495 states and 4273 transitions. [2020-09-24 15:04:10,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:10,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 4273 transitions. [2020-09-24 15:04:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-09-24 15:04:10,934 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:10,934 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:10,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:04:10,935 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1639235331, now seen corresponding path program 1 times [2020-09-24 15:04:10,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:10,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339877636] [2020-09-24 15:04:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-09-24 15:04:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-09-24 15:04:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 123 proven. 141 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2020-09-24 15:04:11,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339877636] [2020-09-24 15:04:11,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:11,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:04:11,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057638721] [2020-09-24 15:04:11,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:04:11,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:04:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:04:11,351 INFO L87 Difference]: Start difference. First operand 3495 states and 4273 transitions. Second operand 7 states. [2020-09-24 15:04:13,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:13,596 INFO L93 Difference]: Finished difference Result 7150 states and 8751 transitions. [2020-09-24 15:04:13,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:04:13,601 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 315 [2020-09-24 15:04:13,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:13,618 INFO L225 Difference]: With dead ends: 7150 [2020-09-24 15:04:13,619 INFO L226 Difference]: Without dead ends: 3670 [2020-09-24 15:04:13,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-09-24 15:04:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2020-09-24 15:04:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 3653. [2020-09-24 15:04:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3653 states. [2020-09-24 15:04:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 4449 transitions. [2020-09-24 15:04:13,728 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 4449 transitions. Word has length 315 [2020-09-24 15:04:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:13,729 INFO L479 AbstractCegarLoop]: Abstraction has 3653 states and 4449 transitions. [2020-09-24 15:04:13,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:04:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 4449 transitions. [2020-09-24 15:04:13,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-24 15:04:13,741 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:13,742 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:13,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:04:13,742 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash 221321404, now seen corresponding path program 1 times [2020-09-24 15:04:13,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:13,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842665396] [2020-09-24 15:04:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:13,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:13,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:14,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:14,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:14,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-24 15:04:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 143 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:04:14,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842665396] [2020-09-24 15:04:14,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:14,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:14,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261352170] [2020-09-24 15:04:14,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:14,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:14,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:14,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:14,579 INFO L87 Difference]: Start difference. First operand 3653 states and 4449 transitions. Second operand 11 states. [2020-09-24 15:04:19,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:19,417 INFO L93 Difference]: Finished difference Result 7861 states and 9569 transitions. [2020-09-24 15:04:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 15:04:19,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 320 [2020-09-24 15:04:19,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:19,437 INFO L225 Difference]: With dead ends: 7861 [2020-09-24 15:04:19,438 INFO L226 Difference]: Without dead ends: 4373 [2020-09-24 15:04:19,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2020-09-24 15:04:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2020-09-24 15:04:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 4124. [2020-09-24 15:04:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4124 states. [2020-09-24 15:04:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4124 states to 4124 states and 4985 transitions. [2020-09-24 15:04:19,548 INFO L78 Accepts]: Start accepts. Automaton has 4124 states and 4985 transitions. Word has length 320 [2020-09-24 15:04:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:19,549 INFO L479 AbstractCegarLoop]: Abstraction has 4124 states and 4985 transitions. [2020-09-24 15:04:19,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 4124 states and 4985 transitions. [2020-09-24 15:04:19,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-09-24 15:04:19,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:19,572 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 15:04:19,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:04:19,572 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:19,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2117887098, now seen corresponding path program 1 times [2020-09-24 15:04:19,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:19,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043873686] [2020-09-24 15:04:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:19,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:19,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:19,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:19,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 15:04:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:19,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-09-24 15:04:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 287 proven. 16 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-09-24 15:04:20,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043873686] [2020-09-24 15:04:20,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:20,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:20,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269203012] [2020-09-24 15:04:20,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:20,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:20,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:20,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:20,183 INFO L87 Difference]: Start difference. First operand 4124 states and 4985 transitions. Second operand 11 states. [2020-09-24 15:04:25,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:25,475 INFO L93 Difference]: Finished difference Result 10653 states and 12990 transitions. [2020-09-24 15:04:25,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:04:25,476 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 383 [2020-09-24 15:04:25,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:25,497 INFO L225 Difference]: With dead ends: 10653 [2020-09-24 15:04:25,498 INFO L226 Difference]: Without dead ends: 4617 [2020-09-24 15:04:25,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:04:25,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4617 states. [2020-09-24 15:04:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4617 to 3554. [2020-09-24 15:04:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3554 states. [2020-09-24 15:04:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 3950 transitions. [2020-09-24 15:04:25,599 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 3950 transitions. Word has length 383 [2020-09-24 15:04:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:25,600 INFO L479 AbstractCegarLoop]: Abstraction has 3554 states and 3950 transitions. [2020-09-24 15:04:25,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:25,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 3950 transitions. [2020-09-24 15:04:25,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2020-09-24 15:04:25,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:25,618 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, 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, 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] [2020-09-24 15:04:25,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:04:25,619 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:25,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:25,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1497559813, now seen corresponding path program 1 times [2020-09-24 15:04:25,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:25,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649091465] [2020-09-24 15:04:25,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:26,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-24 15:04:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:26,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2020-09-24 15:04:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:26,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-09-24 15:04:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 177 proven. 393 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-09-24 15:04:26,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649091465] [2020-09-24 15:04:26,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:26,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 15:04:26,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859582635] [2020-09-24 15:04:26,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 15:04:26,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:26,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 15:04:26,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:04:26,484 INFO L87 Difference]: Start difference. First operand 3554 states and 3950 transitions. Second operand 16 states. [2020-09-24 15:04:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:33,695 INFO L93 Difference]: Finished difference Result 9034 states and 10173 transitions. [2020-09-24 15:04:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 15:04:33,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 439 [2020-09-24 15:04:33,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:33,718 INFO L225 Difference]: With dead ends: 9034 [2020-09-24 15:04:33,718 INFO L226 Difference]: Without dead ends: 5650 [2020-09-24 15:04:33,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=361, Invalid=1361, Unknown=0, NotChecked=0, Total=1722 [2020-09-24 15:04:33,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5650 states. [2020-09-24 15:04:33,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5650 to 4170. [2020-09-24 15:04:33,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4170 states. [2020-09-24 15:04:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4170 states to 4170 states and 4620 transitions. [2020-09-24 15:04:33,873 INFO L78 Accepts]: Start accepts. Automaton has 4170 states and 4620 transitions. Word has length 439 [2020-09-24 15:04:33,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:33,874 INFO L479 AbstractCegarLoop]: Abstraction has 4170 states and 4620 transitions. [2020-09-24 15:04:33,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 15:04:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4170 states and 4620 transitions. [2020-09-24 15:04:33,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-09-24 15:04:33,893 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:33,894 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, 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, 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] [2020-09-24 15:04:33,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:04:33,895 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:33,895 INFO L82 PathProgramCache]: Analyzing trace with hash -105143810, now seen corresponding path program 1 times [2020-09-24 15:04:33,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:33,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884137610] [2020-09-24 15:04:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 15:04:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-24 15:04:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-24 15:04:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:34,850 INFO L134 CoverageAnalysis]: Checked inductivity of 655 backedges. 269 proven. 313 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-09-24 15:04:34,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884137610] [2020-09-24 15:04:34,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:34,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 15:04:34,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341420569] [2020-09-24 15:04:34,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 15:04:34,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 15:04:34,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:04:34,853 INFO L87 Difference]: Start difference. First operand 4170 states and 4620 transitions. Second operand 17 states.