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/Problem03_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:26,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:26,309 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:26,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 21:54:26,346 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:26,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:26,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:26,353 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:26,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:26,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:26,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:26,364 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:26,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:26,369 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:26,370 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:26,371 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:26,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:26,379 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:26,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:26,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:26,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:26,383 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:26,383 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:26,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:26,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:26,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:26,386 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:26,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:26,390 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 [2019-10-14 21:54:26,409 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:26,409 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:26,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:26,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:26,412 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:26,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:26,413 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:26,413 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:26,413 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:26,413 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:26,414 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:26,414 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:26,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:26,415 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:26,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:26,415 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:26,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:26,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:26,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:26,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:26,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:26,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:26,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:26,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:26,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:26,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:26,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:26,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:26,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:26,690 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:26,710 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:26,714 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:26,716 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:26,716 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:26,717 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-14 21:54:26,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec68fc22/d035769c9a024231a335aafbd41dc233/FLAGf46e552ef [2019-10-14 21:54:27,497 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:27,500 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-10-14 21:54:27,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec68fc22/d035769c9a024231a335aafbd41dc233/FLAGf46e552ef [2019-10-14 21:54:27,603 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec68fc22/d035769c9a024231a335aafbd41dc233 [2019-10-14 21:54:27,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:27,615 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:27,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:27,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:27,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:27,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:27" (1/1) ... [2019-10-14 21:54:27,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5065f2c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:27, skipping insertion in model container [2019-10-14 21:54:27,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:27" (1/1) ... [2019-10-14 21:54:27,632 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:27,725 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:28,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:28,721 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:28,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:29,009 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:29,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29 WrapperNode [2019-10-14 21:54:29,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:29,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:29,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:29,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:29,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,083 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,084 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:29,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:29,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:29,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:29,207 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (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 [2019-10-14 21:54:29,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:29,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:29,263 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:29,263 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:29,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:29,264 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:31,306 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:31,306 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:31,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:31 BoogieIcfgContainer [2019-10-14 21:54:31,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:31,314 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:31,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:31,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:31,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:27" (1/3) ... [2019-10-14 21:54:31,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775dfdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:31, skipping insertion in model container [2019-10-14 21:54:31,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29" (2/3) ... [2019-10-14 21:54:31,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@775dfdff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:31, skipping insertion in model container [2019-10-14 21:54:31,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:31" (3/3) ... [2019-10-14 21:54:31,329 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2019-10-14 21:54:31,345 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:31,358 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:31,373 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:31,414 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:31,415 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:31,416 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:31,417 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:31,417 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:31,417 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:31,417 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:31,417 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:31,453 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:31,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 21:54:31,471 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:31,472 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:31,474 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash -181884296, now seen corresponding path program 1 times [2019-10-14 21:54:31,490 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:31,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496342014] [2019-10-14 21:54:31,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:31,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:31,491 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:32,424 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:32,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496342014] [2019-10-14 21:54:32,606 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:32,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:32,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610505228] [2019-10-14 21:54:32,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:32,613 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:32,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:32,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:32,631 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:32,829 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:33,177 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:54:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:36,687 INFO L93 Difference]: Finished difference Result 1093 states and 1965 transitions. [2019-10-14 21:54:36,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:36,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-10-14 21:54:36,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:36,713 INFO L225 Difference]: With dead ends: 1093 [2019-10-14 21:54:36,713 INFO L226 Difference]: Without dead ends: 700 [2019-10-14 21:54:36,722 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2019-10-14 21:54:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 465. [2019-10-14 21:54:36,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2019-10-14 21:54:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 759 transitions. [2019-10-14 21:54:36,831 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 759 transitions. Word has length 157 [2019-10-14 21:54:36,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:36,833 INFO L462 AbstractCegarLoop]: Abstraction has 465 states and 759 transitions. [2019-10-14 21:54:36,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 759 transitions. [2019-10-14 21:54:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-10-14 21:54:36,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:36,851 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:36,851 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:36,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:36,852 INFO L82 PathProgramCache]: Analyzing trace with hash 752192065, now seen corresponding path program 1 times [2019-10-14 21:54:36,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:36,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664535137] [2019-10-14 21:54:36,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,852 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,166 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,320 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:37,535 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664535137] [2019-10-14 21:54:37,535 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:37,535 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:37,535 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197761435] [2019-10-14 21:54:37,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:37,539 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:37,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:37,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:37,540 INFO L87 Difference]: Start difference. First operand 465 states and 759 transitions. Second operand 8 states. [2019-10-14 21:54:37,737 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:38,039 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:38,391 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:42,131 INFO L93 Difference]: Finished difference Result 1808 states and 3026 transitions. [2019-10-14 21:54:42,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:42,131 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 167 [2019-10-14 21:54:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:42,142 INFO L225 Difference]: With dead ends: 1808 [2019-10-14 21:54:42,142 INFO L226 Difference]: Without dead ends: 1349 [2019-10-14 21:54:42,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:54:42,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2019-10-14 21:54:42,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 905. [2019-10-14 21:54:42,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-14 21:54:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1402 transitions. [2019-10-14 21:54:42,246 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1402 transitions. Word has length 167 [2019-10-14 21:54:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:42,249 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1402 transitions. [2019-10-14 21:54:42,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1402 transitions. [2019-10-14 21:54:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-14 21:54:42,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:42,263 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:42,263 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 519491724, now seen corresponding path program 1 times [2019-10-14 21:54:42,264 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:42,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560066175] [2019-10-14 21:54:42,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,264 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:42,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,663 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:42,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560066175] [2019-10-14 21:54:42,849 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676239211] [2019-10-14 21:54:42,849 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 [2019-10-14 21:54:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:43,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:43,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:43,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:43,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-14 21:54:43,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547014515] [2019-10-14 21:54:43,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:43,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:43,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:43,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:43,177 INFO L87 Difference]: Start difference. First operand 905 states and 1402 transitions. Second operand 3 states. [2019-10-14 21:54:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:44,251 INFO L93 Difference]: Finished difference Result 2650 states and 4183 transitions. [2019-10-14 21:54:44,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:44,254 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 169 [2019-10-14 21:54:44,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:44,270 INFO L225 Difference]: With dead ends: 2650 [2019-10-14 21:54:44,270 INFO L226 Difference]: Without dead ends: 1751 [2019-10-14 21:54:44,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1751 states. [2019-10-14 21:54:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1751 to 1537. [2019-10-14 21:54:44,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1537 states. [2019-10-14 21:54:44,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2157 transitions. [2019-10-14 21:54:44,358 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2157 transitions. Word has length 169 [2019-10-14 21:54:44,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:44,360 INFO L462 AbstractCegarLoop]: Abstraction has 1537 states and 2157 transitions. [2019-10-14 21:54:44,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:44,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2157 transitions. [2019-10-14 21:54:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-14 21:54:44,368 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:44,369 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2019-10-14 21:54:44,583 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:44,584 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:44,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:44,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1544066575, now seen corresponding path program 1 times [2019-10-14 21:54:44,585 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:44,585 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161679834] [2019-10-14 21:54:44,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:44,586 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:44,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:44,902 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:45,055 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:45,340 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:45,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161679834] [2019-10-14 21:54:45,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:45,342 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:54:45,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977598283] [2019-10-14 21:54:45,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:54:45,345 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:45,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:54:45,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:45,346 INFO L87 Difference]: Start difference. First operand 1537 states and 2157 transitions. Second operand 9 states. [2019-10-14 21:54:45,594 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:46,098 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:48,779 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:49,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:49,962 INFO L93 Difference]: Finished difference Result 6180 states and 9213 transitions. [2019-10-14 21:54:49,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:54:49,963 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 218 [2019-10-14 21:54:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:49,994 INFO L225 Difference]: With dead ends: 6180 [2019-10-14 21:54:49,995 INFO L226 Difference]: Without dead ends: 4649 [2019-10-14 21:54:50,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:54:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2019-10-14 21:54:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4164. [2019-10-14 21:54:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4164 states. [2019-10-14 21:54:50,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5670 transitions. [2019-10-14 21:54:50,185 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5670 transitions. Word has length 218 [2019-10-14 21:54:50,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:50,186 INFO L462 AbstractCegarLoop]: Abstraction has 4164 states and 5670 transitions. [2019-10-14 21:54:50,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:54:50,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5670 transitions. [2019-10-14 21:54:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2019-10-14 21:54:50,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:50,205 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:50,205 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 661081392, now seen corresponding path program 1 times [2019-10-14 21:54:50,206 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:50,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175113296] [2019-10-14 21:54:50,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:50,208 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:50,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:50,486 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:50,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 90 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:50,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175113296] [2019-10-14 21:54:50,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080829080] [2019-10-14 21:54:50,945 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 [2019-10-14 21:54:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:51,165 INFO L256 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:51,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 21:54:51,295 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:51,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:54:51,296 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310657406] [2019-10-14 21:54:51,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:51,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:51,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:51,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:51,298 INFO L87 Difference]: Start difference. First operand 4164 states and 5670 transitions. Second operand 5 states. [2019-10-14 21:54:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:52,778 INFO L93 Difference]: Finished difference Result 12541 states and 18043 transitions. [2019-10-14 21:54:52,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:52,779 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 253 [2019-10-14 21:54:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:52,828 INFO L225 Difference]: With dead ends: 12541 [2019-10-14 21:54:52,828 INFO L226 Difference]: Without dead ends: 8383 [2019-10-14 21:54:52,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:54:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8383 states. [2019-10-14 21:54:53,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8383 to 8069. [2019-10-14 21:54:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8069 states. [2019-10-14 21:54:53,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 10860 transitions. [2019-10-14 21:54:53,194 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 10860 transitions. Word has length 253 [2019-10-14 21:54:53,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:53,195 INFO L462 AbstractCegarLoop]: Abstraction has 8069 states and 10860 transitions. [2019-10-14 21:54:53,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:53,195 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 10860 transitions. [2019-10-14 21:54:53,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-14 21:54:53,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:53,227 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:54:53,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:53,442 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:53,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:53,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1003600938, now seen corresponding path program 1 times [2019-10-14 21:54:53,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:53,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067988969] [2019-10-14 21:54:53,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:53,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,854 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,997 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 93 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:54,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067988969] [2019-10-14 21:54:54,280 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195791930] [2019-10-14 21:54:54,280 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 [2019-10-14 21:54:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:54,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:54,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:54,744 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:54,744 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:54,745 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-14 21:54:54,745 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989575576] [2019-10-14 21:54:54,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:54,746 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:54,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:54,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:54,747 INFO L87 Difference]: Start difference. First operand 8069 states and 10860 transitions. Second operand 3 states. [2019-10-14 21:54:56,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:56,502 INFO L93 Difference]: Finished difference Result 19949 states and 27733 transitions. [2019-10-14 21:54:56,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:56,502 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 257 [2019-10-14 21:54:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:56,569 INFO L225 Difference]: With dead ends: 19949 [2019-10-14 21:54:56,569 INFO L226 Difference]: Without dead ends: 11886 [2019-10-14 21:54:56,594 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11886 states. [2019-10-14 21:54:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11886 to 11883. [2019-10-14 21:54:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11883 states. [2019-10-14 21:54:56,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11883 states to 11883 states and 16353 transitions. [2019-10-14 21:54:56,926 INFO L78 Accepts]: Start accepts. Automaton has 11883 states and 16353 transitions. Word has length 257 [2019-10-14 21:54:56,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:56,927 INFO L462 AbstractCegarLoop]: Abstraction has 11883 states and 16353 transitions. [2019-10-14 21:54:56,927 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:56,927 INFO L276 IsEmpty]: Start isEmpty. Operand 11883 states and 16353 transitions. [2019-10-14 21:54:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2019-10-14 21:54:56,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:56,969 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:54:57,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:57,180 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:57,180 INFO L82 PathProgramCache]: Analyzing trace with hash -2045887005, now seen corresponding path program 1 times [2019-10-14 21:54:57,181 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:57,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475481275] [2019-10-14 21:54:57,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:57,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:57,181 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,448 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:57,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475481275] [2019-10-14 21:54:57,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098288085] [2019-10-14 21:54:57,865 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 [2019-10-14 21:54:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,079 INFO L256 TraceCheckSpWp]: Trace formula consists of 1107 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:58,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 21:54:58,178 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:58,178 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:58,178 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684361525] [2019-10-14 21:54:58,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:58,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:58,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:58,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:58,181 INFO L87 Difference]: Start difference. First operand 11883 states and 16353 transitions. Second operand 3 states.