/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:08:20,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:08:20,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:08:21,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:08:21,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:08:21,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:08:21,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:08:21,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:08:21,116 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:08:21,117 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:08:21,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:08:21,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:08:21,124 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:08:21,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:08:21,124 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:08:21,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:08:21,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:08:21,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:08:21,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:08:21,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:08:21,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:08:21,126 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:08:21,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:08:21,126 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:08:21,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:08:21,130 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:08:21,130 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:08:21,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:08:21,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:08:21,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:08:21,131 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:08:21,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:08:21,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:08:21,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:08:21,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:08:21,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:08:21,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:08:21,410 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:08:21,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:08:21,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:08:21,436 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:08:21,437 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:08:21,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-11-06 19:08:21,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/610685fb1/dc268c2522124e27b4e9fe6e0669f743/FLAG52ad9275c [2019-11-06 19:08:22,058 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:08:22,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label17.c [2019-11-06 19:08:22,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/610685fb1/dc268c2522124e27b4e9fe6e0669f743/FLAG52ad9275c [2019-11-06 19:08:22,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/610685fb1/dc268c2522124e27b4e9fe6e0669f743 [2019-11-06 19:08:22,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:08:22,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:08:22,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:22,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:08:22,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:08:22,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:22" (1/1) ... [2019-11-06 19:08:22,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d32d88f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:22, skipping insertion in model container [2019-11-06 19:08:22,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:08:22" (1/1) ... [2019-11-06 19:08:22,297 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:08:22,364 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:08:23,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:23,076 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:08:23,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:08:23,310 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:08:23,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23 WrapperNode [2019-11-06 19:08:23,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:08:23,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:08:23,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:08:23,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:08:23,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,357 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... [2019-11-06 19:08:23,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:08:23,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:08:23,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:08:23,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:08:23,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-11-06 19:08:23,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:08:23,555 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:08:23,555 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:08:23,555 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:08:23,555 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:08:23,555 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:08:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:08:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:08:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:08:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:08:23,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:08:25,299 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:08:25,300 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:08:25,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:25 BoogieIcfgContainer [2019-11-06 19:08:25,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:08:25,303 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:08:25,303 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:08:25,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:08:25,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:08:22" (1/3) ... [2019-11-06 19:08:25,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ad4c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:25, skipping insertion in model container [2019-11-06 19:08:25,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:08:23" (2/3) ... [2019-11-06 19:08:25,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ad4c86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:08:25, skipping insertion in model container [2019-11-06 19:08:25,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:08:25" (3/3) ... [2019-11-06 19:08:25,311 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label17.c [2019-11-06 19:08:25,321 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:08:25,330 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:08:25,342 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:08:25,373 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:08:25,373 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:08:25,374 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:08:25,374 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:08:25,374 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:08:25,374 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:08:25,374 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:08:25,374 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:08:25,402 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-11-06 19:08:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-06 19:08:25,411 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:25,412 INFO L410 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] [2019-11-06 19:08:25,414 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2013037499, now seen corresponding path program 1 times [2019-11-06 19:08:25,431 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:25,432 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759611054] [2019-11-06 19:08:25,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:25,909 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759611054] [2019-11-06 19:08:25,910 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:25,910 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:08:25,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79479940] [2019-11-06 19:08:25,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:25,920 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:25,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:08:25,943 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-11-06 19:08:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:29,057 INFO L93 Difference]: Finished difference Result 1004 states and 1802 transitions. [2019-11-06 19:08:29,057 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:29,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2019-11-06 19:08:29,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:29,109 INFO L225 Difference]: With dead ends: 1004 [2019-11-06 19:08:29,109 INFO L226 Difference]: Without dead ends: 644 [2019-11-06 19:08:29,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2019-11-06 19:08:29,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623. [2019-11-06 19:08:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 19:08:29,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions. [2019-11-06 19:08:29,255 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 44 [2019-11-06 19:08:29,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:29,256 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 957 transitions. [2019-11-06 19:08:29,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:29,256 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions. [2019-11-06 19:08:29,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-06 19:08:29,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:29,263 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:29,263 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:29,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash -697152023, now seen corresponding path program 1 times [2019-11-06 19:08:29,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:29,264 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305775072] [2019-11-06 19:08:29,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:29,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:29,530 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305775072] [2019-11-06 19:08:29,530 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:29,530 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 19:08:29,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857698104] [2019-11-06 19:08:29,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 19:08:29,533 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 19:08:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:29,534 INFO L87 Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states. [2019-11-06 19:08:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:32,112 INFO L93 Difference]: Finished difference Result 1867 states and 2956 transitions. [2019-11-06 19:08:32,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 19:08:32,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 119 [2019-11-06 19:08:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:32,128 INFO L225 Difference]: With dead ends: 1867 [2019-11-06 19:08:32,129 INFO L226 Difference]: Without dead ends: 1250 [2019-11-06 19:08:32,132 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:08:32,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2019-11-06 19:08:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020. [2019-11-06 19:08:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2019-11-06 19:08:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions. [2019-11-06 19:08:32,205 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 119 [2019-11-06 19:08:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:32,207 INFO L462 AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions. [2019-11-06 19:08:32,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 19:08:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions. [2019-11-06 19:08:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 19:08:32,218 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:32,218 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:32,219 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:32,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:32,219 INFO L82 PathProgramCache]: Analyzing trace with hash 957639322, now seen corresponding path program 1 times [2019-11-06 19:08:32,219 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:32,220 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344729980] [2019-11-06 19:08:32,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:32,494 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344729980] [2019-11-06 19:08:32,494 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:08:32,495 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:08:32,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331925187] [2019-11-06 19:08:32,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:08:32,497 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:32,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:08:32,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:08:32,498 INFO L87 Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states. [2019-11-06 19:08:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:35,344 INFO L93 Difference]: Finished difference Result 3063 states and 4491 transitions. [2019-11-06 19:08:35,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 19:08:35,344 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-11-06 19:08:35,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:35,362 INFO L225 Difference]: With dead ends: 3063 [2019-11-06 19:08:35,362 INFO L226 Difference]: Without dead ends: 2049 [2019-11-06 19:08:35,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:35,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2019-11-06 19:08:35,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822. [2019-11-06 19:08:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1822 states. [2019-11-06 19:08:35,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions. [2019-11-06 19:08:35,499 INFO L78 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 132 [2019-11-06 19:08:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:35,501 INFO L462 AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions. [2019-11-06 19:08:35,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 19:08:35,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions. [2019-11-06 19:08:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-06 19:08:35,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:35,505 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:35,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:35,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:35,505 INFO L82 PathProgramCache]: Analyzing trace with hash -523045564, now seen corresponding path program 1 times [2019-11-06 19:08:35,505 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:35,506 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422183218] [2019-11-06 19:08:35,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:35,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:35,792 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422183218] [2019-11-06 19:08:35,793 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350831260] [2019-11-06 19:08:35,793 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:35,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:35,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:35,995 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:35,996 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-11-06 19:08:35,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570306037] [2019-11-06 19:08:35,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:35,997 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:35,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:35,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:35,998 INFO L87 Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states. [2019-11-06 19:08:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:37,192 INFO L93 Difference]: Finished difference Result 4442 states and 6217 transitions. [2019-11-06 19:08:37,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:37,193 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2019-11-06 19:08:37,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:37,210 INFO L225 Difference]: With dead ends: 4442 [2019-11-06 19:08:37,210 INFO L226 Difference]: Without dead ends: 2814 [2019-11-06 19:08:37,215 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:37,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2814 states. [2019-11-06 19:08:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809. [2019-11-06 19:08:37,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2809 states. [2019-11-06 19:08:37,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions. [2019-11-06 19:08:37,307 INFO L78 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 175 [2019-11-06 19:08:37,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:37,309 INFO L462 AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions. [2019-11-06 19:08:37,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:37,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions. [2019-11-06 19:08:37,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-06 19:08:37,313 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:37,313 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:37,520 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:37,520 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:37,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1124795769, now seen corresponding path program 1 times [2019-11-06 19:08:37,521 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:37,522 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465132135] [2019-11-06 19:08:37,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:37,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:37,851 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465132135] [2019-11-06 19:08:37,852 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139613264] [2019-11-06 19:08:37,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:38,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 19:08:38,012 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:38,073 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:08:38,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:38,074 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-11-06 19:08:38,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262176933] [2019-11-06 19:08:38,075 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 19:08:38,075 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:38,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 19:08:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:08:38,076 INFO L87 Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 9 states. [2019-11-06 19:08:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:40,232 INFO L93 Difference]: Finished difference Result 5448 states and 7595 transitions. [2019-11-06 19:08:40,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 19:08:40,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 200 [2019-11-06 19:08:40,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:40,248 INFO L225 Difference]: With dead ends: 5448 [2019-11-06 19:08:40,249 INFO L226 Difference]: Without dead ends: 2833 [2019-11-06 19:08:40,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 19:08:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2833 states. [2019-11-06 19:08:40,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2788. [2019-11-06 19:08:40,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2788 states. [2019-11-06 19:08:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3468 transitions. [2019-11-06 19:08:40,328 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 3468 transitions. Word has length 200 [2019-11-06 19:08:40,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:40,329 INFO L462 AbstractCegarLoop]: Abstraction has 2788 states and 3468 transitions. [2019-11-06 19:08:40,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 19:08:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 3468 transitions. [2019-11-06 19:08:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-06 19:08:40,333 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:40,333 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:40,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:40,540 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:40,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:40,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1183490646, now seen corresponding path program 1 times [2019-11-06 19:08:40,541 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:40,541 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38255850] [2019-11-06 19:08:40,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:40,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:40,782 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38255850] [2019-11-06 19:08:40,782 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123784880] [2019-11-06 19:08:40,783 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:40,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:08:40,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:41,008 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-11-06 19:08:41,009 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:41,009 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:08:41,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099235226] [2019-11-06 19:08:41,010 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:08:41,010 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:41,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:08:41,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:41,010 INFO L87 Difference]: Start difference. First operand 2788 states and 3468 transitions. Second operand 3 states. [2019-11-06 19:08:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:42,062 INFO L93 Difference]: Finished difference Result 7307 states and 9349 transitions. [2019-11-06 19:08:42,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:08:42,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-11-06 19:08:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:42,086 INFO L225 Difference]: With dead ends: 7307 [2019-11-06 19:08:42,086 INFO L226 Difference]: Without dead ends: 4713 [2019-11-06 19:08:42,093 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:08:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2019-11-06 19:08:42,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4522. [2019-11-06 19:08:42,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4522 states. [2019-11-06 19:08:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 5741 transitions. [2019-11-06 19:08:42,198 INFO L78 Accepts]: Start accepts. Automaton has 4522 states and 5741 transitions. Word has length 205 [2019-11-06 19:08:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:42,199 INFO L462 AbstractCegarLoop]: Abstraction has 4522 states and 5741 transitions. [2019-11-06 19:08:42,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:08:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4522 states and 5741 transitions. [2019-11-06 19:08:42,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2019-11-06 19:08:42,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:42,208 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:08:42,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:42,413 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:42,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash 608776500, now seen corresponding path program 1 times [2019-11-06 19:08:42,414 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:42,414 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682980806] [2019-11-06 19:08:42,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:42,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 5 proven. 141 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:43,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682980806] [2019-11-06 19:08:43,296 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138940878] [2019-11-06 19:08:43,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:43,417 INFO L256 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 19:08:43,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:43,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-06 19:08:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 109 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 19:08:43,634 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:08:43,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17 [2019-11-06 19:08:43,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079550539] [2019-11-06 19:08:43,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:08:43,636 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:43,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:08:43,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:08:43,637 INFO L87 Difference]: Start difference. First operand 4522 states and 5741 transitions. Second operand 5 states. [2019-11-06 19:08:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:08:45,168 INFO L93 Difference]: Finished difference Result 9103 states and 11667 transitions. [2019-11-06 19:08:45,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:08:45,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 283 [2019-11-06 19:08:45,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:08:45,191 INFO L225 Difference]: With dead ends: 9103 [2019-11-06 19:08:45,191 INFO L226 Difference]: Without dead ends: 4775 [2019-11-06 19:08:45,202 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-11-06 19:08:45,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4775 states. [2019-11-06 19:08:45,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4775 to 4734. [2019-11-06 19:08:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4734 states. [2019-11-06 19:08:45,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4734 states to 4734 states and 5986 transitions. [2019-11-06 19:08:45,315 INFO L78 Accepts]: Start accepts. Automaton has 4734 states and 5986 transitions. Word has length 283 [2019-11-06 19:08:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:08:45,315 INFO L462 AbstractCegarLoop]: Abstraction has 4734 states and 5986 transitions. [2019-11-06 19:08:45,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:08:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 4734 states and 5986 transitions. [2019-11-06 19:08:45,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-11-06 19:08:45,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:08:45,330 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:08:45,542 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:45,542 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:08:45,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:08:45,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1644707978, now seen corresponding path program 1 times [2019-11-06 19:08:45,544 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:08:45,544 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088600616] [2019-11-06 19:08:45,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:08:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:45,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 179 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:08:46,234 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088600616] [2019-11-06 19:08:46,235 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578256011] [2019-11-06 19:08:46,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:08:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:08:46,419 INFO L256 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 19:08:46,430 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:08:46,464 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:46,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 19:08:46,997 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((v_~a29~0_506 Int)) (let ((.cse1 (+ v_~a29~0_506 69157))) (let ((.cse0 (mod .cse1 299861))) (and (<= |c_old(~a29~0)| v_~a29~0_506) (<= c_~a29~0 (+ .cse0 277)) (not (= .cse0 0)) (< .cse1 0))))) (exists ((v_~a29~0_506 Int)) (let ((.cse2 (+ v_~a29~0_506 69157))) (and (<= |c_old(~a29~0)| v_~a29~0_506) (<= c_~a29~0 (+ (mod .cse2 299861) 300138)) (<= 0 .cse2)))) (exists ((v_~a29~0_506 Int)) (let ((.cse3 (mod (+ v_~a29~0_506 69157) 299861))) (and (<= |c_old(~a29~0)| v_~a29~0_506) (<= c_~a29~0 (+ .cse3 300138)) (= .cse3 0))))) is different from true [2019-11-06 19:08:51,522 WARN L191 SmtUtils]: Spent 2.98 s on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2019-11-06 19:08:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 4 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2019-11-06 19:08:51,744 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:08:51,744 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2019-11-06 19:08:51,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546106606] [2019-11-06 19:08:51,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 19:08:51,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:08:51,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 19:08:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=194, Unknown=2, NotChecked=28, Total=272 [2019-11-06 19:08:51,747 INFO L87 Difference]: Start difference. First operand 4734 states and 5986 transitions. Second operand 17 states. [2019-11-06 19:08:51,983 WARN L191 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2019-11-06 19:08:58,320 WARN L191 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 22