/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 15:03:37,957 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 15:03:38,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 15:03:38,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 15:03:38,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 15:03:38,006 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 15:03:38,007 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 15:03:38,008 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 15:03:38,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 15:03:38,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 15:03:38,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 15:03:38,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 15:03:38,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 15:03:38,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 15:03:38,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 15:03:38,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 15:03:38,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 15:03:38,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 15:03:38,042 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 15:03:38,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 15:03:38,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 15:03:38,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 15:03:38,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 15:03:38,110 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 15:03:38,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 15:03:38,111 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 15:03:38,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 15:03:38,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 15:03:38,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 15:03:38,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 15:03:38,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 15:03:38,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 15:03:38,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 15:03:38,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 15:03:38,113 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 15:03:38,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 15:03:38,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 15:03:38,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 15:03:38,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 15:03:38,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 15:03:38,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 15:03:38,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 15:03:38,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 15:03:38,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 15:03:38,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 15:03:38,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 15:03:38,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 15:03:38,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 15:03:38,117 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 15:03:38,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 15:03:38,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 15:03:38,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 15:03:38,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 15:03:38,638 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 15:03:38,639 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label43.c [2020-09-24 15:03:38,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fecaa07b8/db0f95d4d63b4935a1e8ff13ef7a41cb/FLAG23d5381e0 [2020-09-24 15:03:39,458 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 15:03:39,463 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label43.c [2020-09-24 15:03:39,485 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fecaa07b8/db0f95d4d63b4935a1e8ff13ef7a41cb/FLAG23d5381e0 [2020-09-24 15:03:39,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fecaa07b8/db0f95d4d63b4935a1e8ff13ef7a41cb [2020-09-24 15:03:39,678 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 15:03:39,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 15:03:39,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:39,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 15:03:39,691 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 15:03:39,692 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:39" (1/1) ... [2020-09-24 15:03:39,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@601fc90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:39, skipping insertion in model container [2020-09-24 15:03:39,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:03:39" (1/1) ... [2020-09-24 15:03:39,706 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 15:03:39,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 15:03:40,234 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:40,241 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 15:03:40,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 15:03:40,513 INFO L208 MainTranslator]: Completed translation [2020-09-24 15:03:40,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40 WrapperNode [2020-09-24 15:03:40,514 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 15:03:40,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 15:03:40,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 15:03:40,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 15:03:40,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,638 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (1/1) ... [2020-09-24 15:03:40,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 15:03:40,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 15:03:40,654 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 15:03:40,654 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 15:03:40,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (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 15:03:40,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 15:03:40,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 15:03:40,751 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 15:03:40,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 15:03:40,752 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 15:03:40,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 15:03:40,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 15:03:40,753 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 15:03:40,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 15:03:40,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 15:03:40,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 15:03:42,245 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 15:03:42,245 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 15:03:42,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:42 BoogieIcfgContainer [2020-09-24 15:03:42,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 15:03:42,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 15:03:42,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 15:03:42,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 15:03:42,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:03:39" (1/3) ... [2020-09-24 15:03:42,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9990a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:42, skipping insertion in model container [2020-09-24 15:03:42,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:03:40" (2/3) ... [2020-09-24 15:03:42,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9990a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:03:42, skipping insertion in model container [2020-09-24 15:03:42,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:03:42" (3/3) ... [2020-09-24 15:03:42,266 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label43.c [2020-09-24 15:03:42,279 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 15:03:42,291 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 15:03:42,315 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 15:03:42,352 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 15:03:42,352 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 15:03:42,352 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 15:03:42,353 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 15:03:42,353 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 15:03:42,353 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 15:03:42,353 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 15:03:42,353 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 15:03:42,386 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 15:03:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 15:03:42,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:42,399 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] [2020-09-24 15:03:42,399 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:42,408 INFO L82 PathProgramCache]: Analyzing trace with hash -495691305, now seen corresponding path program 1 times [2020-09-24 15:03:42,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:42,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276926026] [2020-09-24 15:03:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:42,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:42,933 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 15:03:42,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276926026] [2020-09-24 15:03:42,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:42,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 15:03:42,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348937613] [2020-09-24 15:03:42,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 15:03:42,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:42,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 15:03:42,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 15:03:42,969 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-24 15:03:45,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:45,226 INFO L93 Difference]: Finished difference Result 1163 states and 1589 transitions. [2020-09-24 15:03:45,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 15:03:45,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-24 15:03:45,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:45,270 INFO L225 Difference]: With dead ends: 1163 [2020-09-24 15:03:45,271 INFO L226 Difference]: Without dead ends: 634 [2020-09-24 15:03:45,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:03:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-09-24 15:03:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 580. [2020-09-24 15:03:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-09-24 15:03:45,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 732 transitions. [2020-09-24 15:03:45,394 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 732 transitions. Word has length 54 [2020-09-24 15:03:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:45,395 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 732 transitions. [2020-09-24 15:03:45,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 15:03:45,395 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 732 transitions. [2020-09-24 15:03:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-24 15:03:45,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:45,404 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:03:45,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 15:03:45,405 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:45,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1783140025, now seen corresponding path program 1 times [2020-09-24 15:03:45,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:45,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120069553] [2020-09-24 15:03:45,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:45,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 37 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:45,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120069553] [2020-09-24 15:03:45,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:45,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:03:45,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890358743] [2020-09-24 15:03:45,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:03:45,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:03:45,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:03:45,754 INFO L87 Difference]: Start difference. First operand 580 states and 732 transitions. Second operand 5 states. [2020-09-24 15:03:47,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:47,719 INFO L93 Difference]: Finished difference Result 1473 states and 1948 transitions. [2020-09-24 15:03:47,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:03:47,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2020-09-24 15:03:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:47,730 INFO L225 Difference]: With dead ends: 1473 [2020-09-24 15:03:47,730 INFO L226 Difference]: Without dead ends: 908 [2020-09-24 15:03:47,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:03:47,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-09-24 15:03:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 886. [2020-09-24 15:03:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2020-09-24 15:03:47,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1068 transitions. [2020-09-24 15:03:47,794 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1068 transitions. Word has length 133 [2020-09-24 15:03:47,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:47,795 INFO L479 AbstractCegarLoop]: Abstraction has 886 states and 1068 transitions. [2020-09-24 15:03:47,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:03:47,795 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1068 transitions. [2020-09-24 15:03:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-24 15:03:47,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:47,801 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:03:47,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 15:03:47,801 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:47,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:47,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1411236914, now seen corresponding path program 1 times [2020-09-24 15:03:47,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:47,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175756986] [2020-09-24 15:03:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:47,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:47,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:48,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175756986] [2020-09-24 15:03:48,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:48,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 15:03:48,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937700726] [2020-09-24 15:03:48,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:03:48,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:48,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:03:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:48,103 INFO L87 Difference]: Start difference. First operand 886 states and 1068 transitions. Second operand 7 states. [2020-09-24 15:03:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:50,300 INFO L93 Difference]: Finished difference Result 1954 states and 2409 transitions. [2020-09-24 15:03:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 15:03:50,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-09-24 15:03:50,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:50,310 INFO L225 Difference]: With dead ends: 1954 [2020-09-24 15:03:50,311 INFO L226 Difference]: Without dead ends: 1083 [2020-09-24 15:03:50,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 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 15:03:50,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2020-09-24 15:03:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1047. [2020-09-24 15:03:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1047 states. [2020-09-24 15:03:50,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1274 transitions. [2020-09-24 15:03:50,347 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1274 transitions. Word has length 140 [2020-09-24 15:03:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:50,348 INFO L479 AbstractCegarLoop]: Abstraction has 1047 states and 1274 transitions. [2020-09-24 15:03:50,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:03:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1274 transitions. [2020-09-24 15:03:50,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-24 15:03:50,352 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:50,352 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:03:50,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 15:03:50,353 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:50,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:50,353 INFO L82 PathProgramCache]: Analyzing trace with hash -27995731, now seen corresponding path program 1 times [2020-09-24 15:03:50,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:50,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959780516] [2020-09-24 15:03:50,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:50,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:50,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:50,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:50,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 15:03:50,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959780516] [2020-09-24 15:03:50,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 15:03:50,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 15:03:50,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986647525] [2020-09-24 15:03:50,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:50,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:50,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:50,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:50,618 INFO L87 Difference]: Start difference. First operand 1047 states and 1274 transitions. Second operand 8 states. [2020-09-24 15:03:53,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:53,127 INFO L93 Difference]: Finished difference Result 2778 states and 3694 transitions. [2020-09-24 15:03:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 15:03:53,130 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 145 [2020-09-24 15:03:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:53,145 INFO L225 Difference]: With dead ends: 2778 [2020-09-24 15:03:53,146 INFO L226 Difference]: Without dead ends: 1746 [2020-09-24 15:03:53,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 15:03:53,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2020-09-24 15:03:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1682. [2020-09-24 15:03:53,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1682 states. [2020-09-24 15:03:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 2089 transitions. [2020-09-24 15:03:53,256 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 2089 transitions. Word has length 145 [2020-09-24 15:03:53,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:53,257 INFO L479 AbstractCegarLoop]: Abstraction has 1682 states and 2089 transitions. [2020-09-24 15:03:53,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:53,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 2089 transitions. [2020-09-24 15:03:53,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-09-24 15:03:53,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:53,267 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, 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] [2020-09-24 15:03:53,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 15:03:53,268 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:53,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:53,268 INFO L82 PathProgramCache]: Analyzing trace with hash -357233039, now seen corresponding path program 1 times [2020-09-24 15:03:53,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:53,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698510086] [2020-09-24 15:03:53,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 15:03:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:53,667 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:03:53,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698510086] [2020-09-24 15:03:53,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:53,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 15:03:53,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513296338] [2020-09-24 15:03:53,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 15:03:53,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:53,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 15:03:53,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-24 15:03:53,670 INFO L87 Difference]: Start difference. First operand 1682 states and 2089 transitions. Second operand 7 states. [2020-09-24 15:03:55,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:55,582 INFO L93 Difference]: Finished difference Result 3259 states and 4086 transitions. [2020-09-24 15:03:55,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 15:03:55,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 235 [2020-09-24 15:03:55,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:55,592 INFO L225 Difference]: With dead ends: 3259 [2020-09-24 15:03:55,592 INFO L226 Difference]: Without dead ends: 1742 [2020-09-24 15:03:55,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 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 15:03:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2020-09-24 15:03:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1686. [2020-09-24 15:03:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1686 states. [2020-09-24 15:03:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 1984 transitions. [2020-09-24 15:03:55,651 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 1984 transitions. Word has length 235 [2020-09-24 15:03:55,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:55,651 INFO L479 AbstractCegarLoop]: Abstraction has 1686 states and 1984 transitions. [2020-09-24 15:03:55,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 15:03:55,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 1984 transitions. [2020-09-24 15:03:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-09-24 15:03:55,657 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:55,657 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, 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] [2020-09-24 15:03:55,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 15:03:55,658 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:55,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:55,658 INFO L82 PathProgramCache]: Analyzing trace with hash -931259862, now seen corresponding path program 1 times [2020-09-24 15:03:55,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:55,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465924869] [2020-09-24 15:03:55,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:55,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:55,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:55,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-09-24 15:03:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:56,008 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 76 proven. 74 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 15:03:56,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465924869] [2020-09-24 15:03:56,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:56,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 15:03:56,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338411815] [2020-09-24 15:03:56,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 15:03:56,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:56,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 15:03:56,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 15:03:56,021 INFO L87 Difference]: Start difference. First operand 1686 states and 1984 transitions. Second operand 8 states. [2020-09-24 15:03:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:03:58,287 INFO L93 Difference]: Finished difference Result 3781 states and 4639 transitions. [2020-09-24 15:03:58,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:03:58,289 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 242 [2020-09-24 15:03:58,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:03:58,301 INFO L225 Difference]: With dead ends: 3781 [2020-09-24 15:03:58,301 INFO L226 Difference]: Without dead ends: 2260 [2020-09-24 15:03:58,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 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 15:03:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2260 states. [2020-09-24 15:03:58,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2260 to 2160. [2020-09-24 15:03:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2160 states. [2020-09-24 15:03:58,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2160 states to 2160 states and 2482 transitions. [2020-09-24 15:03:58,373 INFO L78 Accepts]: Start accepts. Automaton has 2160 states and 2482 transitions. Word has length 242 [2020-09-24 15:03:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:03:58,373 INFO L479 AbstractCegarLoop]: Abstraction has 2160 states and 2482 transitions. [2020-09-24 15:03:58,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 15:03:58,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2160 states and 2482 transitions. [2020-09-24 15:03:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-09-24 15:03:58,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:03:58,379 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, 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] [2020-09-24 15:03:58,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 15:03:58,379 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:03:58,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:03:58,380 INFO L82 PathProgramCache]: Analyzing trace with hash 208544456, now seen corresponding path program 1 times [2020-09-24 15:03:58,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:03:58,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411298854] [2020-09-24 15:03:58,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:03:58,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:03:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:03:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-09-24 15:03:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:03:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 151 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 15:03:58,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411298854] [2020-09-24 15:03:58,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:03:58,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:03:58,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743556436] [2020-09-24 15:03:58,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:03:58,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:03:58,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:03:58,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:03:58,925 INFO L87 Difference]: Start difference. First operand 2160 states and 2482 transitions. Second operand 11 states. [2020-09-24 15:04:03,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:03,174 INFO L93 Difference]: Finished difference Result 5982 states and 6978 transitions. [2020-09-24 15:04:03,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 15:04:03,174 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 254 [2020-09-24 15:04:03,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:03,187 INFO L225 Difference]: With dead ends: 5982 [2020-09-24 15:04:03,187 INFO L226 Difference]: Without dead ends: 2842 [2020-09-24 15:04:03,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2020-09-24 15:04:03,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2842 states. [2020-09-24 15:04:03,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2842 to 2382. [2020-09-24 15:04:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2382 states. [2020-09-24 15:04:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2382 states to 2382 states and 2613 transitions. [2020-09-24 15:04:03,253 INFO L78 Accepts]: Start accepts. Automaton has 2382 states and 2613 transitions. Word has length 254 [2020-09-24 15:04:03,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:03,253 INFO L479 AbstractCegarLoop]: Abstraction has 2382 states and 2613 transitions. [2020-09-24 15:04:03,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:03,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2382 states and 2613 transitions. [2020-09-24 15:04:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-09-24 15:04:03,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:03,259 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, 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, 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] [2020-09-24 15:04:03,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 15:04:03,260 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:03,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:03,260 INFO L82 PathProgramCache]: Analyzing trace with hash -638770695, now seen corresponding path program 1 times [2020-09-24 15:04:03,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:03,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451638514] [2020-09-24 15:04:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:03,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:03,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:03,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:03,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-24 15:04:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 86 proven. 20 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-09-24 15:04:04,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451638514] [2020-09-24 15:04:04,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:04,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 15:04:04,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890078514] [2020-09-24 15:04:04,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 15:04:04,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 15:04:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:04:04,190 INFO L87 Difference]: Start difference. First operand 2382 states and 2613 transitions. Second operand 14 states. [2020-09-24 15:04:06,997 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-09-24 15:04:07,515 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-09-24 15:04:10,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:10,619 INFO L93 Difference]: Finished difference Result 5915 states and 6576 transitions. [2020-09-24 15:04:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-24 15:04:10,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 289 [2020-09-24 15:04:10,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:10,635 INFO L225 Difference]: With dead ends: 5915 [2020-09-24 15:04:10,635 INFO L226 Difference]: Without dead ends: 3542 [2020-09-24 15:04:10,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 15:04:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3542 states. [2020-09-24 15:04:10,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3542 to 3022. [2020-09-24 15:04:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-24 15:04:10,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 3337 transitions. [2020-09-24 15:04:10,715 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 3337 transitions. Word has length 289 [2020-09-24 15:04:10,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:10,716 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 3337 transitions. [2020-09-24 15:04:10,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 15:04:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 3337 transitions. [2020-09-24 15:04:10,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-09-24 15:04:10,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:10,723 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, 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, 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 15:04:10,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 15:04:10,724 INFO L427 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:10,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:10,724 INFO L82 PathProgramCache]: Analyzing trace with hash 918527302, now seen corresponding path program 1 times [2020-09-24 15:04:10,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:10,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133962243] [2020-09-24 15:04:10,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:10,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:10,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:10,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 15:04:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-09-24 15:04:11,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133962243] [2020-09-24 15:04:11,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:11,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:04:11,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143546760] [2020-09-24 15:04:11,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:11,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:11,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:11,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:11,098 INFO L87 Difference]: Start difference. First operand 3022 states and 3337 transitions. Second operand 5 states. [2020-09-24 15:04:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:12,612 INFO L93 Difference]: Finished difference Result 3032 states and 3348 transitions. [2020-09-24 15:04:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:04:12,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-09-24 15:04:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:12,627 INFO L225 Difference]: With dead ends: 3032 [2020-09-24 15:04:12,627 INFO L226 Difference]: Without dead ends: 3030 [2020-09-24 15:04:12,629 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:04:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2020-09-24 15:04:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 3022. [2020-09-24 15:04:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3022 states. [2020-09-24 15:04:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 3336 transitions. [2020-09-24 15:04:12,708 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 3336 transitions. Word has length 311 [2020-09-24 15:04:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:12,709 INFO L479 AbstractCegarLoop]: Abstraction has 3022 states and 3336 transitions. [2020-09-24 15:04:12,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:12,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 3336 transitions. [2020-09-24 15:04:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-09-24 15:04:12,717 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:12,718 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:12,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 15:04:12,719 INFO L427 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 981706763, now seen corresponding path program 1 times [2020-09-24 15:04:12,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:12,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253428834] [2020-09-24 15:04:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:12,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:12,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:12,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:12,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-09-24 15:04:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:13,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2020-09-24 15:04:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 134 proven. 204 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-24 15:04:13,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253428834] [2020-09-24 15:04:13,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:13,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:13,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249790801] [2020-09-24 15:04:13,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:13,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:13,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:13,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:13,362 INFO L87 Difference]: Start difference. First operand 3022 states and 3336 transitions. Second operand 11 states. [2020-09-24 15:04:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:17,504 INFO L93 Difference]: Finished difference Result 6914 states and 7705 transitions. [2020-09-24 15:04:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 15:04:17,505 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 317 [2020-09-24 15:04:17,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:17,522 INFO L225 Difference]: With dead ends: 6914 [2020-09-24 15:04:17,522 INFO L226 Difference]: Without dead ends: 4057 [2020-09-24 15:04:17,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2020-09-24 15:04:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2020-09-24 15:04:17,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3673. [2020-09-24 15:04:17,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3673 states. [2020-09-24 15:04:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 4081 transitions. [2020-09-24 15:04:17,626 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 4081 transitions. Word has length 317 [2020-09-24 15:04:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:17,627 INFO L479 AbstractCegarLoop]: Abstraction has 3673 states and 4081 transitions. [2020-09-24 15:04:17,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 4081 transitions. [2020-09-24 15:04:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-09-24 15:04:17,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:17,641 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:17,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 15:04:17,642 INFO L427 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:17,642 INFO L82 PathProgramCache]: Analyzing trace with hash -20902202, now seen corresponding path program 1 times [2020-09-24 15:04:17,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:17,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496168968] [2020-09-24 15:04:17,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:17,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:17,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:17,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:17,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 15:04:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:17,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-24 15:04:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 276 proven. 16 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-09-24 15:04:18,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496168968] [2020-09-24 15:04:18,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:18,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 15:04:18,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806850476] [2020-09-24 15:04:18,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 15:04:18,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 15:04:18,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-24 15:04:18,209 INFO L87 Difference]: Start difference. First operand 3673 states and 4081 transitions. Second operand 11 states. [2020-09-24 15:04:23,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:23,246 INFO L93 Difference]: Finished difference Result 7862 states and 8727 transitions. [2020-09-24 15:04:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 15:04:23,247 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 371 [2020-09-24 15:04:23,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:23,263 INFO L225 Difference]: With dead ends: 7862 [2020-09-24 15:04:23,264 INFO L226 Difference]: Without dead ends: 4354 [2020-09-24 15:04:23,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-24 15:04:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2020-09-24 15:04:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 4309. [2020-09-24 15:04:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4309 states. [2020-09-24 15:04:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4309 states to 4309 states and 4684 transitions. [2020-09-24 15:04:23,353 INFO L78 Accepts]: Start accepts. Automaton has 4309 states and 4684 transitions. Word has length 371 [2020-09-24 15:04:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:23,354 INFO L479 AbstractCegarLoop]: Abstraction has 4309 states and 4684 transitions. [2020-09-24 15:04:23,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 15:04:23,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4309 states and 4684 transitions. [2020-09-24 15:04:23,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-09-24 15:04:23,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:23,366 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:04:23,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 15:04:23,366 INFO L427 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:23,367 INFO L82 PathProgramCache]: Analyzing trace with hash 566672652, now seen corresponding path program 1 times [2020-09-24 15:04:23,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:23,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844981823] [2020-09-24 15:04:23,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:23,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:23,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:23,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:23,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 15:04:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:23,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-09-24 15:04:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 121 proven. 3 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2020-09-24 15:04:23,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844981823] [2020-09-24 15:04:23,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:23,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 15:04:23,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463138992] [2020-09-24 15:04:23,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 15:04:23,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:23,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 15:04:23,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 15:04:23,774 INFO L87 Difference]: Start difference. First operand 4309 states and 4684 transitions. Second operand 5 states. [2020-09-24 15:04:25,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:25,105 INFO L93 Difference]: Finished difference Result 4467 states and 4842 transitions. [2020-09-24 15:04:25,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 15:04:25,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 393 [2020-09-24 15:04:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:25,120 INFO L225 Difference]: With dead ends: 4467 [2020-09-24 15:04:25,120 INFO L226 Difference]: Without dead ends: 4309 [2020-09-24 15:04:25,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 15:04:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2020-09-24 15:04:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4303. [2020-09-24 15:04:25,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4303 states. [2020-09-24 15:04:25,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4303 states to 4303 states and 4673 transitions. [2020-09-24 15:04:25,197 INFO L78 Accepts]: Start accepts. Automaton has 4303 states and 4673 transitions. Word has length 393 [2020-09-24 15:04:25,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:25,197 INFO L479 AbstractCegarLoop]: Abstraction has 4303 states and 4673 transitions. [2020-09-24 15:04:25,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 15:04:25,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4303 states and 4673 transitions. [2020-09-24 15:04:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2020-09-24 15:04:25,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:25,211 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, 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, 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] [2020-09-24 15:04:25,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 15:04:25,211 INFO L427 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:25,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1816587316, now seen corresponding path program 1 times [2020-09-24 15:04:25,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:25,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294444884] [2020-09-24 15:04:25,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:25,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2020-09-24 15:04:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-09-24 15:04:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 114 proven. 24 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2020-09-24 15:04:25,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294444884] [2020-09-24 15:04:25,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:25,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 15:04:25,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847653484] [2020-09-24 15:04:25,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 15:04:25,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 15:04:25,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-24 15:04:25,649 INFO L87 Difference]: Start difference. First operand 4303 states and 4673 transitions. Second operand 9 states. [2020-09-24 15:04:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 15:04:27,755 INFO L93 Difference]: Finished difference Result 4314 states and 4683 transitions. [2020-09-24 15:04:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 15:04:27,756 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 396 [2020-09-24 15:04:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 15:04:27,768 INFO L225 Difference]: With dead ends: 4314 [2020-09-24 15:04:27,768 INFO L226 Difference]: Without dead ends: 4312 [2020-09-24 15:04:27,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2020-09-24 15:04:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2020-09-24 15:04:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 4153. [2020-09-24 15:04:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4153 states. [2020-09-24 15:04:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4153 states to 4153 states and 4502 transitions. [2020-09-24 15:04:27,843 INFO L78 Accepts]: Start accepts. Automaton has 4153 states and 4502 transitions. Word has length 396 [2020-09-24 15:04:27,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 15:04:27,844 INFO L479 AbstractCegarLoop]: Abstraction has 4153 states and 4502 transitions. [2020-09-24 15:04:27,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 15:04:27,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4153 states and 4502 transitions. [2020-09-24 15:04:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 455 [2020-09-24 15:04:27,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 15:04:27,856 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, 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, 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 15:04:27,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 15:04:27,856 INFO L427 AbstractCegarLoop]: === Iteration 14 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 15:04:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 15:04:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -840406106, now seen corresponding path program 1 times [2020-09-24 15:04:27,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 15:04:27,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972587003] [2020-09-24 15:04:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 15:04:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 15:04:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 15:04:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2020-09-24 15:04:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 249 [2020-09-24 15:04:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-09-24 15:04:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 15:04:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 266 proven. 304 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-09-24 15:04:28,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972587003] [2020-09-24 15:04:28,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 15:04:28,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 15:04:28,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156460868] [2020-09-24 15:04:28,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 15:04:28,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 15:04:28,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 15:04:28,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-24 15:04:28,758 INFO L87 Difference]: Start difference. First operand 4153 states and 4502 transitions. Second operand 17 states.