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/Problem18_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:35,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:35,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:35,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:35,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:35,983 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:35,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:35,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:35,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:35,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:35,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:35,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:35,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:35,993 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:35,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:35,999 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:36,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:36,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:36,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:36,005 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:36,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:36,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:36,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:36,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:36,012 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 18:06:36,012 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 18:06:36,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 18:06:36,013 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 18:06:36,014 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 18:06:36,015 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 18:06:36,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:36,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:36,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:36,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:36,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:36,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:36,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:36,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:36,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:36,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:36,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:36,023 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 18:06:36,046 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:36,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:36,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:36,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:36,049 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:36,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:36,050 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:36,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:36,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:36,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:36,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:36,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:36,052 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:36,052 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:36,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:36,053 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:36,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:36,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:36,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:36,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:36,054 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:36,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:36,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:36,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:36,055 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:36,055 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:36,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:36,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:36,055 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:36,327 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:36,345 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:36,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:36,351 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:36,351 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:36,352 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-13 18:06:36,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c44b6f1/3f463d0dddcc4aac8f35b59b36f8f4d9/FLAG047eb37a7 [2019-10-13 18:06:37,230 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:37,231 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label16.c [2019-10-13 18:06:37,259 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c44b6f1/3f463d0dddcc4aac8f35b59b36f8f4d9/FLAG047eb37a7 [2019-10-13 18:06:37,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/40c44b6f1/3f463d0dddcc4aac8f35b59b36f8f4d9 [2019-10-13 18:06:37,746 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:37,748 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:37,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:37,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:37,756 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:37,757 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:37" (1/1) ... [2019-10-13 18:06:37,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5808f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:37, skipping insertion in model container [2019-10-13 18:06:37,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:37" (1/1) ... [2019-10-13 18:06:37,769 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:37,896 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:39,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:39,236 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:39,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:39,711 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:39,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39 WrapperNode [2019-10-13 18:06:39,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:39,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:39,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:39,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:39,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:39,729 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:39,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:39,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:39,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:39,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:39,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (1/1) ... [2019-10-13 18:06:40,007 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:40,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:40,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:40,008 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:40,009 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (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 18:06:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:40,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:40,097 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:06:40,098 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:40,098 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:06:40,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:40,100 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:40,101 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:40,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:40,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:43,992 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:43,992 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:43,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:43 BoogieIcfgContainer [2019-10-13 18:06:43,994 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:43,996 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:43,996 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:43,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:43,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:37" (1/3) ... [2019-10-13 18:06:44,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c372077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:44, skipping insertion in model container [2019-10-13 18:06:44,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:39" (2/3) ... [2019-10-13 18:06:44,001 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c372077 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:44, skipping insertion in model container [2019-10-13 18:06:44,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:43" (3/3) ... [2019-10-13 18:06:44,003 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label16.c [2019-10-13 18:06:44,013 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:44,022 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:44,034 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:44,070 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:44,070 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:44,071 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:44,071 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:44,071 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:44,071 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:44,071 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:44,072 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:44,107 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:06:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 18:06:44,181 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:44,182 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:44,186 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:44,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1134727921, now seen corresponding path program 1 times [2019-10-13 18:06:44,202 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:44,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303668687] [2019-10-13 18:06:44,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:44,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:44,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:44,571 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 18:06:44,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303668687] [2019-10-13 18:06:44,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:44,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:44,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170682827] [2019-10-13 18:06:44,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:44,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:44,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:44,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:44,595 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:06:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:54,363 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-10-13 18:06:54,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:54,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-13 18:06:54,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:54,402 INFO L225 Difference]: With dead ends: 2984 [2019-10-13 18:06:54,402 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:06:54,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:06:54,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-10-13 18:06:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-10-13 18:06:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-10-13 18:06:54,578 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 52 [2019-10-13 18:06:54,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:54,579 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-10-13 18:06:54,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:54,579 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-10-13 18:06:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:06:54,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:54,586 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:54,586 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:54,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1821965093, now seen corresponding path program 1 times [2019-10-13 18:06:54,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:54,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470989274] [2019-10-13 18:06:54,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:54,588 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:54,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:54,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:54,846 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:54,847 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470989274] [2019-10-13 18:06:54,847 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:54,847 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:06:54,847 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090743374] [2019-10-13 18:06:54,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:06:54,850 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:54,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:06:54,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:54,851 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-10-13 18:07:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:05,691 INFO L93 Difference]: Finished difference Result 8648 states and 15579 transitions. [2019-10-13 18:07:05,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:07:05,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-10-13 18:07:05,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:05,736 INFO L225 Difference]: With dead ends: 8648 [2019-10-13 18:07:05,736 INFO L226 Difference]: Without dead ends: 6522 [2019-10-13 18:07:05,744 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:07:05,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6522 states. [2019-10-13 18:07:05,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 6483. [2019-10-13 18:07:05,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6483 states. [2019-10-13 18:07:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 10419 transitions. [2019-10-13 18:07:05,957 INFO L78 Accepts]: Start accepts. Automaton has 6483 states and 10419 transitions. Word has length 125 [2019-10-13 18:07:05,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:05,959 INFO L462 AbstractCegarLoop]: Abstraction has 6483 states and 10419 transitions. [2019-10-13 18:07:05,959 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:07:05,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6483 states and 10419 transitions. [2019-10-13 18:07:05,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 18:07:05,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:05,977 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:05,978 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:05,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:05,978 INFO L82 PathProgramCache]: Analyzing trace with hash -683392156, now seen corresponding path program 1 times [2019-10-13 18:07:05,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:05,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128984455] [2019-10-13 18:07:05,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:05,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:05,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:06,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128984455] [2019-10-13 18:07:06,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622016146] [2019-10-13 18:07:06,401 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 18:07:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:06,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:07:06,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:07:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:06,560 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:07:06,561 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 18:07:06,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157370851] [2019-10-13 18:07:06,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:07:06,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:06,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:07:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:07:06,563 INFO L87 Difference]: Start difference. First operand 6483 states and 10419 transitions. Second operand 3 states. [2019-10-13 18:07:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:10,788 INFO L93 Difference]: Finished difference Result 19357 states and 31808 transitions. [2019-10-13 18:07:10,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:07:10,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 174 [2019-10-13 18:07:10,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:10,865 INFO L225 Difference]: With dead ends: 19357 [2019-10-13 18:07:10,865 INFO L226 Difference]: Without dead ends: 12880 [2019-10-13 18:07:10,885 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:07:10,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12880 states. [2019-10-13 18:07:11,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12880 to 12880. [2019-10-13 18:07:11,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12880 states. [2019-10-13 18:07:11,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12880 states to 12880 states and 20409 transitions. [2019-10-13 18:07:11,256 INFO L78 Accepts]: Start accepts. Automaton has 12880 states and 20409 transitions. Word has length 174 [2019-10-13 18:07:11,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:11,259 INFO L462 AbstractCegarLoop]: Abstraction has 12880 states and 20409 transitions. [2019-10-13 18:07:11,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:07:11,259 INFO L276 IsEmpty]: Start isEmpty. Operand 12880 states and 20409 transitions. [2019-10-13 18:07:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-13 18:07:11,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:11,267 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:11,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:07:11,471 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:11,472 INFO L82 PathProgramCache]: Analyzing trace with hash 532686032, now seen corresponding path program 1 times [2019-10-13 18:07:11,472 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:11,472 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447171177] [2019-10-13 18:07:11,472 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:11,473 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:11,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:11,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:11,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447171177] [2019-10-13 18:07:11,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:07:11,937 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:07:11,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735165800] [2019-10-13 18:07:11,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:07:11,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:07:11,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:07:11,939 INFO L87 Difference]: Start difference. First operand 12880 states and 20409 transitions. Second operand 9 states.