/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:17:47,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:17:47,900 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:17:47,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:17:47,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:17:47,919 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:17:47,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:17:47,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:17:47,934 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:17:47,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:17:47,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:17:47,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:17:47,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:17:47,940 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:17:47,941 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:17:47,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:17:47,946 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:17:47,947 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:17:47,951 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:17:47,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:17:47,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:17:47,963 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:17:47,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:17:47,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:17:47,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:17:47,970 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:17:47,970 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:17:47,972 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:17:47,973 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:17:47,976 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:17:47,976 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:17:47,978 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:17:47,979 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:17:47,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:17:47,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:17:47,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:17:47,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:17:47,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:17:47,982 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:17:47,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:17:47,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:17:47,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 19:17:48,014 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:17:48,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:17:48,018 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:17:48,019 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:17:48,019 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:17:48,019 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:17:48,019 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:17:48,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:17:48,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:17:48,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:17:48,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:17:48,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:17:48,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:17:48,023 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:17:48,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:17:48,023 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:17:48,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:17:48,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:17:48,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:17:48,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:17:48,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:17:48,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:48,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:17:48,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:17:48,028 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:17:48,028 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:17:48,028 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:17:48,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:17:48,028 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:17:48,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:17:48,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:17:48,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:17:48,374 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:17:48,375 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:17:48,375 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-11-06 19:17:48,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391a136aa/582ed1eb802146ed83b2aecc2413c34d/FLAG4a296db71 [2019-11-06 19:17:49,125 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:17:49,126 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label24.c [2019-11-06 19:17:49,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391a136aa/582ed1eb802146ed83b2aecc2413c34d/FLAG4a296db71 [2019-11-06 19:17:49,266 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/391a136aa/582ed1eb802146ed83b2aecc2413c34d [2019-11-06 19:17:49,277 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:17:49,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:17:49,284 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:49,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:17:49,288 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:17:49,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:49" (1/1) ... [2019-11-06 19:17:49,293 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40be8e80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:49, skipping insertion in model container [2019-11-06 19:17:49,293 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:17:49" (1/1) ... [2019-11-06 19:17:49,302 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:17:49,386 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:17:50,192 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:50,198 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:17:50,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:17:50,419 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:17:50,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50 WrapperNode [2019-11-06 19:17:50,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:17:50,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:17:50,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:17:50,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:17:50,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... [2019-11-06 19:17:50,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:17:50,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:17:50,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:17:50,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:17:50,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:17:50,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:17:50,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:17:50,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:17:50,727 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:17:50,728 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:17:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:17:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:17:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:17:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:17:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:17:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:17:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:17:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:17:53,472 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:17:53,472 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:17:53,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:53 BoogieIcfgContainer [2019-11-06 19:17:53,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:17:53,477 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:17:53,477 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:17:53,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:17:53,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:17:49" (1/3) ... [2019-11-06 19:17:53,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c512fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:53, skipping insertion in model container [2019-11-06 19:17:53,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:17:50" (2/3) ... [2019-11-06 19:17:53,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66c512fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:17:53, skipping insertion in model container [2019-11-06 19:17:53,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:17:53" (3/3) ... [2019-11-06 19:17:53,499 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label24.c [2019-11-06 19:17:53,510 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:17:53,520 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:17:53,532 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:17:53,574 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:17:53,575 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:17:53,575 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:17:53,575 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:17:53,575 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:17:53,575 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:17:53,575 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:17:53,576 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:17:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 19:17:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 19:17:53,621 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:53,622 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:53,624 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:53,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:53,631 INFO L82 PathProgramCache]: Analyzing trace with hash 272014893, now seen corresponding path program 1 times [2019-11-06 19:17:53,640 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:53,640 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443704932] [2019-11-06 19:17:53,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:54,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:17:54,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:17:54,080 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443704932] [2019-11-06 19:17:54,081 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:17:54,081 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:17:54,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168145949] [2019-11-06 19:17:54,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:17:54,092 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:17:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:17:54,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:17:54,118 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-11-06 19:17:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:17:59,585 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-11-06 19:17:59,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:17:59,587 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-11-06 19:17:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:17:59,626 INFO L225 Difference]: With dead ends: 1515 [2019-11-06 19:17:59,627 INFO L226 Difference]: Without dead ends: 1038 [2019-11-06 19:17:59,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:17:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-11-06 19:17:59,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-11-06 19:17:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-11-06 19:17:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-11-06 19:17:59,786 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 58 [2019-11-06 19:17:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:17:59,787 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-11-06 19:17:59,788 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:17:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-11-06 19:17:59,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-11-06 19:17:59,809 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:17:59,810 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:17:59,810 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:17:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:17:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash 190582509, now seen corresponding path program 1 times [2019-11-06 19:17:59,811 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:17:59,812 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815872414] [2019-11-06 19:17:59,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:17:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,302 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 102 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:00,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815872414] [2019-11-06 19:18:00,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393594655] [2019-11-06 19:18:00,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:00,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:00,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 19:18:00,599 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:00,599 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-11-06 19:18:00,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131046544] [2019-11-06 19:18:00,604 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:00,605 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:00,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:00,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-11-06 19:18:00,606 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-11-06 19:18:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:04,706 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-11-06 19:18:04,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:04,707 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-11-06 19:18:04,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:04,722 INFO L225 Difference]: With dead ends: 3131 [2019-11-06 19:18:04,722 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 19:18:04,726 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:04,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 19:18:04,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-11-06 19:18:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-11-06 19:18:04,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-11-06 19:18:04,819 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 240 [2019-11-06 19:18:04,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:04,822 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-11-06 19:18:04,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:04,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-11-06 19:18:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2019-11-06 19:18:04,828 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:04,829 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:05,071 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:05,072 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:05,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:05,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1651699548, now seen corresponding path program 1 times [2019-11-06 19:18:05,073 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:05,073 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827488769] [2019-11-06 19:18:05,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:05,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 102 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-06 19:18:05,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827488769] [2019-11-06 19:18:05,543 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984774198] [2019-11-06 19:18:05,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:05,652 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:05,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-06 19:18:05,767 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:05,767 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:05,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125486256] [2019-11-06 19:18:05,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:05,768 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:05,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:05,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:05,769 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-11-06 19:18:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:08,602 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-11-06 19:18:08,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 19:18:08,608 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2019-11-06 19:18:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:08,635 INFO L225 Difference]: With dead ends: 6311 [2019-11-06 19:18:08,636 INFO L226 Difference]: Without dead ends: 4234 [2019-11-06 19:18:08,642 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 19:18:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-11-06 19:18:08,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-11-06 19:18:08,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-11-06 19:18:08,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-11-06 19:18:08,794 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 247 [2019-11-06 19:18:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:08,796 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-11-06 19:18:08,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-11-06 19:18:08,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2019-11-06 19:18:08,803 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:08,803 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:09,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:09,008 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:09,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:09,009 INFO L82 PathProgramCache]: Analyzing trace with hash 816359692, now seen corresponding path program 1 times [2019-11-06 19:18:09,009 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:09,009 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805811614] [2019-11-06 19:18:09,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:09,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:18:09,453 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805811614] [2019-11-06 19:18:09,454 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686267942] [2019-11-06 19:18:09,454 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:09,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:09,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:18:09,735 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:18:09,736 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 19:18:09,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612808625] [2019-11-06 19:18:09,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 19:18:09,738 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:09,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 19:18:09,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:09,739 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-11-06 19:18:17,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:17,142 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-11-06 19:18:17,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 19:18:17,144 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 287 [2019-11-06 19:18:17,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:17,179 INFO L225 Difference]: With dead ends: 13272 [2019-11-06 19:18:17,180 INFO L226 Difference]: Without dead ends: 7642 [2019-11-06 19:18:17,196 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 295 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 19:18:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-11-06 19:18:17,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-11-06 19:18:17,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-11-06 19:18:17,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-11-06 19:18:17,361 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 287 [2019-11-06 19:18:17,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:17,362 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-11-06 19:18:17,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 19:18:17,363 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-11-06 19:18:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2019-11-06 19:18:17,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:17,379 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:17,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:17,583 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:17,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1542869435, now seen corresponding path program 1 times [2019-11-06 19:18:17,584 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:17,584 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523641303] [2019-11-06 19:18:17,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 204 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-11-06 19:18:18,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523641303] [2019-11-06 19:18:18,492 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19131520] [2019-11-06 19:18:18,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:18,757 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 19:18:18,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:18:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2019-11-06 19:18:19,159 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:18:19,160 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-11-06 19:18:19,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746252564] [2019-11-06 19:18:19,161 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:18:19,161 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:18:19,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:18:19,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:18:19,162 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-11-06 19:18:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:18:20,854 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-11-06 19:18:20,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 19:18:20,855 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 556 [2019-11-06 19:18:20,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:18:20,884 INFO L225 Difference]: With dead ends: 13846 [2019-11-06 19:18:20,885 INFO L226 Difference]: Without dead ends: 7616 [2019-11-06 19:18:20,902 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 560 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 19:18:20,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-11-06 19:18:21,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-11-06 19:18:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-11-06 19:18:21,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-11-06 19:18:21,158 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 556 [2019-11-06 19:18:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:18:21,159 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-11-06 19:18:21,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:18:21,159 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-11-06 19:18:21,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2019-11-06 19:18:21,186 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:18:21,187 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:18:21,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:21,400 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:18:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:18:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash 857894719, now seen corresponding path program 1 times [2019-11-06 19:18:21,400 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:18:21,401 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662434496] [2019-11-06 19:18:21,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:18:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 324 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-11-06 19:18:22,550 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662434496] [2019-11-06 19:18:22,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042768518] [2019-11-06 19:18:22,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:18:22,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:18:22,847 INFO L256 TraceCheckSpWp]: Trace formula consists of 937 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:18:22,869 INFO L279 TraceCheckSpWp]: Computing forward predicates...