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/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:53,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:53,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:53,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:53,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:53,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:53,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:53,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:53,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:53,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:53,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:53,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:53,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:53,434 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:53,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:53,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:53,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:53,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:53,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:53,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:53,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:53,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:53,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:53,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:53,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:03:53,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:03:53,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:03:53,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:03:53,467 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:03:53,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:03:53,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:53,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:53,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:53,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:53,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:53,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:53,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:53,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:53,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:53,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:53,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:53,479 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 18:03:53,493 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:53,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:53,494 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:53,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:53,495 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:53,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:53,495 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:53,496 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:53,496 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:53,496 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:53,496 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:53,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:53,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:53,497 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:53,497 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:53,497 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:53,497 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:53,497 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:53,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:53,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:53,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:53,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:53,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:53,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:53,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:53,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:53,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:53,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:53,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:53,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:53,811 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:53,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:53,817 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:53,818 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:53,819 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-13 18:03:53,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f645ebbe/1898d72ca9df4474bcf20723dbe732e6/FLAGf6c0a607d [2019-10-13 18:03:54,631 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:54,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-13 18:03:54,652 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f645ebbe/1898d72ca9df4474bcf20723dbe732e6/FLAGf6c0a607d [2019-10-13 18:03:54,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f645ebbe/1898d72ca9df4474bcf20723dbe732e6 [2019-10-13 18:03:54,825 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:54,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:54,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:54,828 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:54,831 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:54,832 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:54" (1/1) ... [2019-10-13 18:03:54,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:54, skipping insertion in model container [2019-10-13 18:03:54,837 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:54" (1/1) ... [2019-10-13 18:03:54,845 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:54,929 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:55,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:55,740 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:56,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:56,201 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:56,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56 WrapperNode [2019-10-13 18:03:56,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:56,203 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:56,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:56,204 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:56,218 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,219 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (1/1) ... [2019-10-13 18:03:56,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:56,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:56,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:56,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:56,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (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 18:03:56,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:56,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:03:56,491 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:56,491 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:56,492 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:03:56,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:56,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:56,492 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:56,493 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:56,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:56,493 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:59,833 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:59,837 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:59,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:59 BoogieIcfgContainer [2019-10-13 18:03:59,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:59,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:59,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:59,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:59,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:54" (1/3) ... [2019-10-13 18:03:59,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a155afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:59, skipping insertion in model container [2019-10-13 18:03:59,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:56" (2/3) ... [2019-10-13 18:03:59,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a155afc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:59, skipping insertion in model container [2019-10-13 18:03:59,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:59" (3/3) ... [2019-10-13 18:03:59,855 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-10-13 18:03:59,866 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:59,875 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:59,887 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:59,919 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:59,920 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:59,920 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:59,920 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:59,920 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:59,920 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:59,920 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:59,920 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:59,950 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:03:59,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 18:03:59,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:59,958 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] [2019-10-13 18:03:59,960 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:59,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:59,967 INFO L82 PathProgramCache]: Analyzing trace with hash -436791267, now seen corresponding path program 1 times [2019-10-13 18:03:59,977 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:59,977 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264860208] [2019-10-13 18:03:59,977 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:59,978 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:59,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:00,262 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 18:04:00,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264860208] [2019-10-13 18:04:00,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:00,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:00,264 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635917959] [2019-10-13 18:04:00,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:00,270 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:00,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:00,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:00,288 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:07,347 INFO L93 Difference]: Finished difference Result 1528 states and 2801 transitions. [2019-10-13 18:04:07,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:07,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-13 18:04:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:07,382 INFO L225 Difference]: With dead ends: 1528 [2019-10-13 18:04:07,382 INFO L226 Difference]: Without dead ends: 1022 [2019-10-13 18:04:07,391 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2019-10-13 18:04:07,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1016. [2019-10-13 18:04:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-10-13 18:04:07,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1523 transitions. [2019-10-13 18:04:07,550 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1523 transitions. Word has length 21 [2019-10-13 18:04:07,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:07,554 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1523 transitions. [2019-10-13 18:04:07,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1523 transitions. [2019-10-13 18:04:07,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 18:04:07,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:07,565 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:04:07,565 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:07,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:07,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1982781274, now seen corresponding path program 1 times [2019-10-13 18:04:07,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:07,567 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375486519] [2019-10-13 18:04:07,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:07,567 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:07,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:07,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375486519] [2019-10-13 18:04:07,933 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349167873] [2019-10-13 18:04:07,934 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 18:04:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:08,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:08,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:08,104 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:08,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:08,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771707322] [2019-10-13 18:04:08,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:08,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:08,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:08,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:08,107 INFO L87 Difference]: Start difference. First operand 1016 states and 1523 transitions. Second operand 3 states. [2019-10-13 18:04:10,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:10,695 INFO L93 Difference]: Finished difference Result 2961 states and 4483 transitions. [2019-10-13 18:04:10,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:10,697 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-10-13 18:04:10,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:10,710 INFO L225 Difference]: With dead ends: 2961 [2019-10-13 18:04:10,710 INFO L226 Difference]: Without dead ends: 1951 [2019-10-13 18:04:10,714 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2019-10-13 18:04:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1949. [2019-10-13 18:04:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1949 states. [2019-10-13 18:04:10,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2576 transitions. [2019-10-13 18:04:10,777 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2576 transitions. Word has length 90 [2019-10-13 18:04:10,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:10,777 INFO L462 AbstractCegarLoop]: Abstraction has 1949 states and 2576 transitions. [2019-10-13 18:04:10,777 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2576 transitions. [2019-10-13 18:04:10,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-13 18:04:10,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:10,784 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, 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] [2019-10-13 18:04:10,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:10,990 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1546364994, now seen corresponding path program 1 times [2019-10-13 18:04:10,992 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:10,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059929236] [2019-10-13 18:04:10,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:10,993 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:10,993 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,521 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-13 18:04:11,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059929236] [2019-10-13 18:04:11,522 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246528508] [2019-10-13 18:04:11,527 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 18:04:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:11,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:04:11,634 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:11,707 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-13 18:04:11,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:11,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-13 18:04:11,708 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701613877] [2019-10-13 18:04:11,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:11,710 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:11,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:11,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:11,711 INFO L87 Difference]: Start difference. First operand 1949 states and 2576 transitions. Second operand 8 states. [2019-10-13 18:04:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:18,157 INFO L93 Difference]: Finished difference Result 5832 states and 7801 transitions. [2019-10-13 18:04:18,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:18,163 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 199 [2019-10-13 18:04:18,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:18,189 INFO L225 Difference]: With dead ends: 5832 [2019-10-13 18:04:18,190 INFO L226 Difference]: Without dead ends: 3889 [2019-10-13 18:04:18,196 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:18,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2019-10-13 18:04:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3540. [2019-10-13 18:04:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2019-10-13 18:04:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4406 transitions. [2019-10-13 18:04:18,315 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4406 transitions. Word has length 199 [2019-10-13 18:04:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:18,317 INFO L462 AbstractCegarLoop]: Abstraction has 3540 states and 4406 transitions. [2019-10-13 18:04:18,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:18,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4406 transitions. [2019-10-13 18:04:18,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-13 18:04:18,326 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:18,327 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, 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] [2019-10-13 18:04:18,530 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:18,530 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:18,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash -666228620, now seen corresponding path program 1 times [2019-10-13 18:04:18,531 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:18,531 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879238178] [2019-10-13 18:04:18,531 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:18,532 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:18,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:04:19,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879238178] [2019-10-13 18:04:19,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954184378] [2019-10-13 18:04:19,028 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 18:04:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:19,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 18:04:19,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:19,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:19,446 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 18:04:19,447 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:19,447 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-13 18:04:19,447 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448221697] [2019-10-13 18:04:19,449 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:19,449 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:19,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:04:19,450 INFO L87 Difference]: Start difference. First operand 3540 states and 4406 transitions. Second operand 5 states. [2019-10-13 18:04:22,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:22,942 INFO L93 Difference]: Finished difference Result 7143 states and 8946 transitions. [2019-10-13 18:04:22,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:22,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2019-10-13 18:04:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:22,961 INFO L225 Difference]: With dead ends: 7143 [2019-10-13 18:04:22,961 INFO L226 Difference]: Without dead ends: 3609 [2019-10-13 18:04:22,969 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:04:22,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2019-10-13 18:04:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3562. [2019-10-13 18:04:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3562 states. [2019-10-13 18:04:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 4435 transitions. [2019-10-13 18:04:23,056 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 4435 transitions. Word has length 301 [2019-10-13 18:04:23,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:23,057 INFO L462 AbstractCegarLoop]: Abstraction has 3562 states and 4435 transitions. [2019-10-13 18:04:23,057 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:23,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 4435 transitions. [2019-10-13 18:04:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-10-13 18:04:23,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:23,065 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:23,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:23,269 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash 579508701, now seen corresponding path program 1 times [2019-10-13 18:04:23,270 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:23,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058578033] [2019-10-13 18:04:23,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:23,271 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:23,271 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-13 18:04:23,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058578033] [2019-10-13 18:04:23,751 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585951185] [2019-10-13 18:04:23,751 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 18:04:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:23,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:23,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:23,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:04:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:24,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:04:24,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-13 18:04:24,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959068636] [2019-10-13 18:04:24,080 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:04:24,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:24,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:04:24,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:04:24,081 INFO L87 Difference]: Start difference. First operand 3562 states and 4435 transitions. Second operand 9 states.