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_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:18,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:18,855 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:18,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:18,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:18,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:18,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:18,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:18,895 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:18,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:18,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:18,898 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:18,898 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:18,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:18,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:18,901 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:18,902 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:18,903 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:18,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:18,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:18,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:18,908 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:18,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:18,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:18,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:06:18,915 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:18,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:18,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:18,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:18,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:18,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:18,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:18,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:18,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:18,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:18,922 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:18,923 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 18:06:18,936 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:18,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:18,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:18,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:18,938 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:18,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:18,939 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:18,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:18,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:18,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:18,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:18,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:18,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:18,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:18,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:18,944 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:18,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:18,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:18,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:18,945 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:18,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:18,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:18,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:18,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:18,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:18,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:18,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:18,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:18,948 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:19,249 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:19,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:19,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:19,267 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:19,268 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:19,269 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-10-13 18:06:19,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f38ccc1/d6e0ed2e141b40bc82daecbdb2e5872a/FLAG4a9c24d95 [2019-10-13 18:06:20,110 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:20,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label12.c [2019-10-13 18:06:20,135 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f38ccc1/d6e0ed2e141b40bc82daecbdb2e5872a/FLAG4a9c24d95 [2019-10-13 18:06:20,227 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f38ccc1/d6e0ed2e141b40bc82daecbdb2e5872a [2019-10-13 18:06:20,237 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:20,239 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:20,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:20,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:20,245 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:20,246 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:20" (1/1) ... [2019-10-13 18:06:20,249 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32ed2b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:20, skipping insertion in model container [2019-10-13 18:06:20,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:20" (1/1) ... [2019-10-13 18:06:20,257 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:20,385 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:21,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:21,709 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:22,191 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:22,220 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:22,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22 WrapperNode [2019-10-13 18:06:22,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:22,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:22,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:22,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:22,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (1/1) ... [2019-10-13 18:06:22,500 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:22,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:22,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:22,501 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:22,502 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (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 18:06:22,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:22,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:22,577 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:22,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:22,578 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:06:22,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:06:22,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:22,580 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:22,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:26,490 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:26,491 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:26,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:26 BoogieIcfgContainer [2019-10-13 18:06:26,493 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:26,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:26,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:26,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:26,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:20" (1/3) ... [2019-10-13 18:06:26,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3f6f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:26, skipping insertion in model container [2019-10-13 18:06:26,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:22" (2/3) ... [2019-10-13 18:06:26,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3f6f08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:26, skipping insertion in model container [2019-10-13 18:06:26,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:26" (3/3) ... [2019-10-13 18:06:26,503 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label12.c [2019-10-13 18:06:26,515 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:26,525 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:26,537 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:26,571 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:26,572 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:26,572 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:26,572 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:26,572 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:26,572 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:26,573 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:26,573 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:06:26,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 18:06:26,616 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:26,617 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] [2019-10-13 18:06:26,619 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:26,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1916525318, now seen corresponding path program 1 times [2019-10-13 18:06:26,634 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:26,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88825233] [2019-10-13 18:06:26,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:26,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:26,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:27,058 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 18:06:27,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88825233] [2019-10-13 18:06:27,060 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:27,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:27,061 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725575882] [2019-10-13 18:06:27,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:27,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:27,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:27,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:27,085 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:06:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:37,259 INFO L93 Difference]: Finished difference Result 2984 states and 5770 transitions. [2019-10-13 18:06:37,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:37,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-13 18:06:37,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:37,304 INFO L225 Difference]: With dead ends: 2984 [2019-10-13 18:06:37,304 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:06:37,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:06:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:06:37,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132. [2019-10-13 18:06:37,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2132 states. [2019-10-13 18:06:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions. [2019-10-13 18:06:37,485 INFO L78 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 23 [2019-10-13 18:06:37,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:37,486 INFO L462 AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions. [2019-10-13 18:06:37,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions. [2019-10-13 18:06:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 18:06:37,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:37,498 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:06:37,498 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:37,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:37,499 INFO L82 PathProgramCache]: Analyzing trace with hash -819711902, now seen corresponding path program 1 times [2019-10-13 18:06:37,499 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:37,500 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946325769] [2019-10-13 18:06:37,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:37,500 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:37,500 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:37,897 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946325769] [2019-10-13 18:06:37,897 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:37,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:06:37,898 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551360693] [2019-10-13 18:06:37,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:06:37,900 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:37,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:06:37,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:06:37,901 INFO L87 Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states. [2019-10-13 18:06:49,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:49,290 INFO L93 Difference]: Finished difference Result 8649 states and 15485 transitions. [2019-10-13 18:06:49,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:06:49,290 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 111 [2019-10-13 18:06:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:49,332 INFO L225 Difference]: With dead ends: 8649 [2019-10-13 18:06:49,332 INFO L226 Difference]: Without dead ends: 6523 [2019-10-13 18:06:49,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:06:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6523 states. [2019-10-13 18:06:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 6502. [2019-10-13 18:06:49,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6502 states. [2019-10-13 18:06:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 9753 transitions. [2019-10-13 18:06:49,557 INFO L78 Accepts]: Start accepts. Automaton has 6502 states and 9753 transitions. Word has length 111 [2019-10-13 18:06:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:49,558 INFO L462 AbstractCegarLoop]: Abstraction has 6502 states and 9753 transitions. [2019-10-13 18:06:49,558 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:06:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 6502 states and 9753 transitions. [2019-10-13 18:06:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:06:49,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:49,565 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:49,566 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1618208947, now seen corresponding path program 1 times [2019-10-13 18:06:49,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:49,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265596940] [2019-10-13 18:06:49,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:49,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:49,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:49,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:49,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:49,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265596940] [2019-10-13 18:06:49,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855002580] [2019-10-13 18:06:49,868 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 18:06:49,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:49,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:06:50,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:06:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:50,091 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:06:50,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8 [2019-10-13 18:06:50,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009515784] [2019-10-13 18:06:50,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:06:50,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:50,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:06:50,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:06:50,094 INFO L87 Difference]: Start difference. First operand 6502 states and 9753 transitions. Second operand 3 states. [2019-10-13 18:06:54,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:54,504 INFO L93 Difference]: Finished difference Result 17267 states and 25492 transitions. [2019-10-13 18:06:54,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:06:54,505 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-13 18:06:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:54,555 INFO L225 Difference]: With dead ends: 17267 [2019-10-13 18:06:54,556 INFO L226 Difference]: Without dead ends: 10771 [2019-10-13 18:06:54,574 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 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 18:06:54,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10771 states. [2019-10-13 18:06:54,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9360. [2019-10-13 18:06:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9360 states. [2019-10-13 18:06:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9360 states to 9360 states and 13070 transitions. [2019-10-13 18:06:54,839 INFO L78 Accepts]: Start accepts. Automaton has 9360 states and 13070 transitions. Word has length 134 [2019-10-13 18:06:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:54,840 INFO L462 AbstractCegarLoop]: Abstraction has 9360 states and 13070 transitions. [2019-10-13 18:06:54,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:06:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9360 states and 13070 transitions. [2019-10-13 18:06:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-10-13 18:06:54,844 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:54,844 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:06:55,049 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:06:55,050 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:55,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1504597139, now seen corresponding path program 1 times [2019-10-13 18:06:55,051 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:55,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181655846] [2019-10-13 18:06:55,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:55,052 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:55,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY