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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:56:00,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:56:00,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:56:00,464 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:56:00,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:56:00,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:56:00,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:56:00,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:56:00,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:56:00,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:56:00,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:56:00,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:56:00,484 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:56:00,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:56:00,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:56:00,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:56:00,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:56:00,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:56:00,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:56:00,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:56:00,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:56:00,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:56:00,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:56:00,497 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:56:00,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:56:00,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:56:00,508 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:56:00,509 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:56:00,510 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 [2019-10-13 17:56:00,524 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:56:00,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:56:00,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:56:00,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:56:00,526 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:56:00,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:56:00,527 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:56:00,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:56:00,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:56:00,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:56:00,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:56:00,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:56:00,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:56:00,528 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:56:00,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:56:00,528 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:56:00,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:56:00,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:56:00,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:56:00,529 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:56:00,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:56:00,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:56:00,530 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:56:00,530 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:56:00,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:56:00,531 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:56:00,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:56:00,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:56:00,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:56:00,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:56:00,886 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:56:00,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:56:00,891 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:56:00,892 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:56:00,893 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-10-13 17:56:00,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/899d595d2/7ca4b141a5b14896a5646dceb0b0e34e/FLAGbf896829e [2019-10-13 17:56:01,662 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:56:01,664 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label54.c [2019-10-13 17:56:01,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/899d595d2/7ca4b141a5b14896a5646dceb0b0e34e/FLAGbf896829e [2019-10-13 17:56:01,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/899d595d2/7ca4b141a5b14896a5646dceb0b0e34e [2019-10-13 17:56:01,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:56:01,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:56:01,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:56:01,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:56:01,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:56:01,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:56:01" (1/1) ... [2019-10-13 17:56:01,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5611840f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:01, skipping insertion in model container [2019-10-13 17:56:01,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:56:01" (1/1) ... [2019-10-13 17:56:01,830 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:56:01,896 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:56:02,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:56:02,696 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:56:03,094 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:56:03,123 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:56:03,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03 WrapperNode [2019-10-13 17:56:03,124 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:56:03,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:56:03,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:56:03,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:56:03,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,188 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,301 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (1/1) ... [2019-10-13 17:56:03,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:56:03,342 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:56:03,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:56:03,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:56:03,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (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 [2019-10-13 17:56:03,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:56:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:56:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:56:03,406 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:56:03,406 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:56:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:56:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:56:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:56:03,407 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:56:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:56:03,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:56:05,446 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:56:05,447 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:56:05,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:56:05 BoogieIcfgContainer [2019-10-13 17:56:05,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:56:05,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:56:05,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:56:05,454 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:56:05,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:56:01" (1/3) ... [2019-10-13 17:56:05,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee5d1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:56:05, skipping insertion in model container [2019-10-13 17:56:05,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:56:03" (2/3) ... [2019-10-13 17:56:05,456 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee5d1cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:56:05, skipping insertion in model container [2019-10-13 17:56:05,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:56:05" (3/3) ... [2019-10-13 17:56:05,458 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label54.c [2019-10-13 17:56:05,469 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:56:05,478 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:56:05,491 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:56:05,522 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:56:05,522 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:56:05,522 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:56:05,522 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:56:05,522 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:56:05,523 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:56:05,523 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:56:05,523 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:56:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:56:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 17:56:05,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:05,570 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:05,572 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:05,579 INFO L82 PathProgramCache]: Analyzing trace with hash -629671171, now seen corresponding path program 1 times [2019-10-13 17:56:05,589 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:05,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437308277] [2019-10-13 17:56:05,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:05,590 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:05,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:06,536 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:06,690 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437308277] [2019-10-13 17:56:06,691 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:06,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:56:06,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839572165] [2019-10-13 17:56:06,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:56:06,698 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:56:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:56:06,716 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:56:06,965 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:07,521 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:11,449 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-10-13 17:56:11,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:56:11,451 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 172 [2019-10-13 17:56:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:11,488 INFO L225 Difference]: With dead ends: 1107 [2019-10-13 17:56:11,488 INFO L226 Difference]: Without dead ends: 699 [2019-10-13 17:56:11,502 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:56:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-13 17:56:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-10-13 17:56:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-10-13 17:56:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-10-13 17:56:11,595 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 172 [2019-10-13 17:56:11,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:11,596 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-10-13 17:56:11,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-10-13 17:56:11,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2019-10-13 17:56:11,603 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:11,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:11,604 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:11,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1631480425, now seen corresponding path program 1 times [2019-10-13 17:56:11,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:11,605 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673829811] [2019-10-13 17:56:11,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:11,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:11,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:11,955 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:11,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:12,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673829811] [2019-10-13 17:56:12,131 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749008710] [2019-10-13 17:56:12,131 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 [2019-10-13 17:56:12,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:12,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:12,377 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:12,571 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:12,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:56:12,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850633003] [2019-10-13 17:56:12,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:12,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:56:12,575 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 3 states. [2019-10-13 17:56:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:13,740 INFO L93 Difference]: Finished difference Result 1364 states and 2099 transitions. [2019-10-13 17:56:13,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:56:13,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 184 [2019-10-13 17:56:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:13,748 INFO L225 Difference]: With dead ends: 1364 [2019-10-13 17:56:13,749 INFO L226 Difference]: Without dead ends: 896 [2019-10-13 17:56:13,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:56:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-13 17:56:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-10-13 17:56:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-13 17:56:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1212 transitions. [2019-10-13 17:56:13,797 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1212 transitions. Word has length 184 [2019-10-13 17:56:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:13,798 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1212 transitions. [2019-10-13 17:56:13,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:56:13,798 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1212 transitions. [2019-10-13 17:56:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 17:56:13,806 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:13,806 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:14,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:14,020 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:14,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1138801162, now seen corresponding path program 1 times [2019-10-13 17:56:14,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:14,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759908558] [2019-10-13 17:56:14,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:14,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:14,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:14,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,334 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,684 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:14,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759908558] [2019-10-13 17:56:14,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:14,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:56:14,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804678209] [2019-10-13 17:56:14,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:56:14,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:14,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:56:14,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:14,687 INFO L87 Difference]: Start difference. First operand 894 states and 1212 transitions. Second operand 9 states. [2019-10-13 17:56:14,855 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:15,484 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:18,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:18,354 INFO L93 Difference]: Finished difference Result 2246 states and 3211 transitions. [2019-10-13 17:56:18,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:56:18,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 199 [2019-10-13 17:56:18,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:18,370 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 17:56:18,370 INFO L226 Difference]: Without dead ends: 1358 [2019-10-13 17:56:18,375 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:56:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-10-13 17:56:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1332. [2019-10-13 17:56:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-10-13 17:56:18,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1777 transitions. [2019-10-13 17:56:18,459 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1777 transitions. Word has length 199 [2019-10-13 17:56:18,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:18,460 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 1777 transitions. [2019-10-13 17:56:18,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:56:18,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1777 transitions. [2019-10-13 17:56:18,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-13 17:56:18,467 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:18,468 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:18,468 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1137241398, now seen corresponding path program 1 times [2019-10-13 17:56:18,469 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:18,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723643054] [2019-10-13 17:56:18,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:18,470 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:18,470 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:18,860 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:19,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723643054] [2019-10-13 17:56:19,133 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:19,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 17:56:19,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554010420] [2019-10-13 17:56:19,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:56:19,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:19,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:56:19,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:56:19,136 INFO L87 Difference]: Start difference. First operand 1332 states and 1777 transitions. Second operand 8 states. [2019-10-13 17:56:19,292 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:19,837 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-13 17:56:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:22,733 INFO L93 Difference]: Finished difference Result 4018 states and 5650 transitions. [2019-10-13 17:56:22,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:56:22,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2019-10-13 17:56:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:22,751 INFO L225 Difference]: With dead ends: 4018 [2019-10-13 17:56:22,751 INFO L226 Difference]: Without dead ends: 2692 [2019-10-13 17:56:22,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:56:22,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2019-10-13 17:56:22,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2654. [2019-10-13 17:56:22,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-13 17:56:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3621 transitions. [2019-10-13 17:56:22,858 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3621 transitions. Word has length 206 [2019-10-13 17:56:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:22,859 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3621 transitions. [2019-10-13 17:56:22,859 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:56:22,859 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3621 transitions. [2019-10-13 17:56:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-13 17:56:22,869 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:22,870 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:22,870 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:22,871 INFO L82 PathProgramCache]: Analyzing trace with hash 928057599, now seen corresponding path program 1 times [2019-10-13 17:56:22,871 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:22,871 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944357701] [2019-10-13 17:56:22,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:22,872 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:22,872 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:23,153 WARN L191 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:23,383 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:56:23,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944357701] [2019-10-13 17:56:23,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360065670] [2019-10-13 17:56:23,384 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 [2019-10-13 17:56:23,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:23,585 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:23,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:56:23,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:23,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-13 17:56:23,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222905290] [2019-10-13 17:56:23,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:23,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:23,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:23,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:23,690 INFO L87 Difference]: Start difference. First operand 2654 states and 3621 transitions. Second operand 3 states. [2019-10-13 17:56:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:24,642 INFO L93 Difference]: Finished difference Result 5304 states and 7255 transitions. [2019-10-13 17:56:24,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:56:24,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2019-10-13 17:56:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:24,661 INFO L225 Difference]: With dead ends: 5304 [2019-10-13 17:56:24,661 INFO L226 Difference]: Without dead ends: 2656 [2019-10-13 17:56:24,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-13 17:56:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2019-10-13 17:56:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-13 17:56:24,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3494 transitions. [2019-10-13 17:56:24,792 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3494 transitions. Word has length 208 [2019-10-13 17:56:24,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:24,793 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3494 transitions. [2019-10-13 17:56:24,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:56:24,793 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3494 transitions. [2019-10-13 17:56:24,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-13 17:56:24,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:24,803 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:25,009 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:25,010 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1369505429, now seen corresponding path program 1 times [2019-10-13 17:56:25,012 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:25,012 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229495823] [2019-10-13 17:56:25,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:25,013 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:25,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:25,337 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:25,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229495823] [2019-10-13 17:56:25,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163918293] [2019-10-13 17:56:25,515 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 [2019-10-13 17:56:25,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:25,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:56:25,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:25,750 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:25,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:25,751 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-13 17:56:25,751 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921913258] [2019-10-13 17:56:25,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:25,752 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:25,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:25,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:56:25,753 INFO L87 Difference]: Start difference. First operand 2654 states and 3494 transitions. Second operand 3 states. [2019-10-13 17:56:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:26,872 INFO L93 Difference]: Finished difference Result 7854 states and 10601 transitions. [2019-10-13 17:56:26,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:56:26,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 217 [2019-10-13 17:56:26,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:26,901 INFO L225 Difference]: With dead ends: 7854 [2019-10-13 17:56:26,902 INFO L226 Difference]: Without dead ends: 5206 [2019-10-13 17:56:26,909 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:56:26,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2019-10-13 17:56:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5200. [2019-10-13 17:56:27,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-10-13 17:56:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 6853 transitions. [2019-10-13 17:56:27,042 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 6853 transitions. Word has length 217 [2019-10-13 17:56:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:27,043 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 6853 transitions. [2019-10-13 17:56:27,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:56:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 6853 transitions. [2019-10-13 17:56:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-13 17:56:27,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:27,060 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:27,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:27,265 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash 233125280, now seen corresponding path program 1 times [2019-10-13 17:56:27,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:27,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722246447] [2019-10-13 17:56:27,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:27,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:27,266 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:27,488 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:27,712 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:56:27,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722246447] [2019-10-13 17:56:27,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630021320] [2019-10-13 17:56:27,713 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 [2019-10-13 17:56:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:27,910 INFO L256 TraceCheckSpWp]: Trace formula consists of 1037 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:56:27,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:56:27,988 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:27,988 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 17:56:27,989 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548613138] [2019-10-13 17:56:27,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:56:27,989 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:27,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:56:27,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:27,990 INFO L87 Difference]: Start difference. First operand 5200 states and 6853 transitions. Second operand 5 states. [2019-10-13 17:56:29,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:29,483 INFO L93 Difference]: Finished difference Result 10482 states and 14338 transitions. [2019-10-13 17:56:29,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:56:29,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2019-10-13 17:56:29,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:29,510 INFO L225 Difference]: With dead ends: 10482 [2019-10-13 17:56:29,510 INFO L226 Difference]: Without dead ends: 5288 [2019-10-13 17:56:29,524 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:56:29,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2019-10-13 17:56:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5216. [2019-10-13 17:56:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2019-10-13 17:56:29,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6777 transitions. [2019-10-13 17:56:29,677 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6777 transitions. Word has length 223 [2019-10-13 17:56:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:29,677 INFO L462 AbstractCegarLoop]: Abstraction has 5216 states and 6777 transitions. [2019-10-13 17:56:29,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6777 transitions. [2019-10-13 17:56:29,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-13 17:56:29,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:29,693 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:29,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:29,907 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:29,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1873774260, now seen corresponding path program 1 times [2019-10-13 17:56:29,907 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:29,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745786911] [2019-10-13 17:56:29,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:29,908 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:29,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:30,114 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:56:30,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745786911] [2019-10-13 17:56:30,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721283166] [2019-10-13 17:56:30,323 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 [2019-10-13 17:56:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:30,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 1214 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:30,541 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:30,616 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:56:30,616 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:56:30,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:56:30,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400578568] [2019-10-13 17:56:30,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:56:30,621 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:30,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:56:30,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:30,621 INFO L87 Difference]: Start difference. First operand 5216 states and 6777 transitions. Second operand 11 states. [2019-10-13 17:56:30,916 WARN L191 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:31,302 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-13 17:56:33,465 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:35,775 INFO L93 Difference]: Finished difference Result 15091 states and 22093 transitions. [2019-10-13 17:56:35,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:56:35,777 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 235 [2019-10-13 17:56:35,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:35,845 INFO L225 Difference]: With dead ends: 15091 [2019-10-13 17:56:35,845 INFO L226 Difference]: Without dead ends: 9881 [2019-10-13 17:56:35,863 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:56:35,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2019-10-13 17:56:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 9602. [2019-10-13 17:56:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9602 states. [2019-10-13 17:56:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9602 states to 9602 states and 12280 transitions. [2019-10-13 17:56:36,208 INFO L78 Accepts]: Start accepts. Automaton has 9602 states and 12280 transitions. Word has length 235 [2019-10-13 17:56:36,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:36,208 INFO L462 AbstractCegarLoop]: Abstraction has 9602 states and 12280 transitions. [2019-10-13 17:56:36,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:56:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 9602 states and 12280 transitions. [2019-10-13 17:56:36,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-13 17:56:36,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:36,234 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:56:36,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:36,439 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:36,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1051688855, now seen corresponding path program 1 times [2019-10-13 17:56:36,440 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:36,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496813148] [2019-10-13 17:56:36,440 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:36,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:36,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat