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_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:20,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:20,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:20,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:20,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:20,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:20,886 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:20,887 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:20,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:20,890 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:20,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:20,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:20,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:20,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:20,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:20,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:20,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:20,897 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:20,899 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:20,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:20,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:20,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:20,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:20,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:20,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:20,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:20,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:20,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:20,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:20,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:20,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:20,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:20,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:20,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:20,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:20,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:20,918 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 18:05:20,931 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:20,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:20,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:20,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:20,933 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:20,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:20,934 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:20,934 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:20,934 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:20,934 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:20,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:20,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:20,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:20,935 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:20,935 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:20,935 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:20,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:20,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:20,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:20,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:20,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:20,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:20,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:20,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:20,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:20,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:20,938 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:20,938 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:20,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:21,273 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:21,290 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:21,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:21,295 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:21,296 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:21,297 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-10-13 18:05:21,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37b65abdf/9f16e9b6de3c4ba2bf054c6d63a213fe/FLAG660f1baf8 [2019-10-13 18:05:22,061 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:22,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label25.c [2019-10-13 18:05:22,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37b65abdf/9f16e9b6de3c4ba2bf054c6d63a213fe/FLAG660f1baf8 [2019-10-13 18:05:22,234 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37b65abdf/9f16e9b6de3c4ba2bf054c6d63a213fe [2019-10-13 18:05:22,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:22,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:22,244 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:22,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:22,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:22,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:22" (1/1) ... [2019-10-13 18:05:22,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3709ac93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:22, skipping insertion in model container [2019-10-13 18:05:22,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:22" (1/1) ... [2019-10-13 18:05:22,259 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:22,332 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:23,010 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:23,015 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:23,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:23,335 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:23,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23 WrapperNode [2019-10-13 18:05:23,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:23,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:23,337 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:23,337 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:23,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,504 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,522 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (1/1) ... [2019-10-13 18:05:23,541 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:23,541 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:23,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:23,542 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:23,545 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (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 18:05:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:23,630 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:23,631 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:23,631 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:23,632 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:23,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:26,006 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:26,007 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:26,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:26 BoogieIcfgContainer [2019-10-13 18:05:26,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:26,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:26,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:26,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:26,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:22" (1/3) ... [2019-10-13 18:05:26,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7012f324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:26, skipping insertion in model container [2019-10-13 18:05:26,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:23" (2/3) ... [2019-10-13 18:05:26,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7012f324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:26, skipping insertion in model container [2019-10-13 18:05:26,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:26" (3/3) ... [2019-10-13 18:05:26,019 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label25.c [2019-10-13 18:05:26,031 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:26,043 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:26,055 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:26,097 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:26,098 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:26,098 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:26,098 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:26,098 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:26,099 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:26,099 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:26,099 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 18:05:26,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:26,148 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:26,151 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:26,158 INFO L82 PathProgramCache]: Analyzing trace with hash 134360965, now seen corresponding path program 1 times [2019-10-13 18:05:26,168 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:26,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166669624] [2019-10-13 18:05:26,168 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,169 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:26,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:26,552 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 18:05:26,553 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166669624] [2019-10-13 18:05:26,554 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:26,554 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:26,554 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364833058] [2019-10-13 18:05:26,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:26,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:26,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:26,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:26,577 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:31,611 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:31,612 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:31,613 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2019-10-13 18:05:31,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:31,640 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:31,640 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:31,651 INFO L600 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 [2019-10-13 18:05:31,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:31,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:31,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-13 18:05:31,773 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 56 [2019-10-13 18:05:31,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:31,773 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-13 18:05:31,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-13 18:05:31,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-13 18:05:31,786 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:31,787 INFO L380 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, 2, 2, 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] [2019-10-13 18:05:31,787 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:31,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1586256827, now seen corresponding path program 1 times [2019-10-13 18:05:31,788 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:31,788 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863469751] [2019-10-13 18:05:31,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,788 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:31,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:31,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 98 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:32,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863469751] [2019-10-13 18:05:32,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973222926] [2019-10-13 18:05:32,312 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 18:05:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:32,423 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:32,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:32,581 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 18:05:32,582 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:32,582 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:32,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619946191] [2019-10-13 18:05:32,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:32,585 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:32,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:32,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:32,586 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-13 18:05:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:35,806 INFO L93 Difference]: Finished difference Result 3129 states and 5063 transitions. [2019-10-13 18:05:35,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:35,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-10-13 18:05:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:35,824 INFO L225 Difference]: With dead ends: 3129 [2019-10-13 18:05:35,824 INFO L226 Difference]: Without dead ends: 2104 [2019-10-13 18:05:35,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:35,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2019-10-13 18:05:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2083. [2019-10-13 18:05:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-13 18:05:35,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3187 transitions. [2019-10-13 18:05:35,935 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3187 transitions. Word has length 238 [2019-10-13 18:05:35,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:35,938 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3187 transitions. [2019-10-13 18:05:35,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:35,939 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3187 transitions. [2019-10-13 18:05:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-13 18:05:35,952 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:35,954 INFO L380 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, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:36,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:36,159 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash -714713860, now seen corresponding path program 1 times [2019-10-13 18:05:36,160 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:36,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161292524] [2019-10-13 18:05:36,160 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:36,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:36,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 98 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:36,593 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161292524] [2019-10-13 18:05:36,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338432053] [2019-10-13 18:05:36,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:36,739 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-10-13 18:05:36,824 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:36,825 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:36,825 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267816002] [2019-10-13 18:05:36,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:36,826 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:36,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:36,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:36,827 INFO L87 Difference]: Start difference. First operand 2083 states and 3187 transitions. Second operand 5 states. [2019-10-13 18:05:39,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:39,528 INFO L93 Difference]: Finished difference Result 6311 states and 9954 transitions. [2019-10-13 18:05:39,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:39,533 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 273 [2019-10-13 18:05:39,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:39,560 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 18:05:39,561 INFO L226 Difference]: Without dead ends: 4234 [2019-10-13 18:05:39,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:39,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-13 18:05:39,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-13 18:05:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-13 18:05:39,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5791 transitions. [2019-10-13 18:05:39,726 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5791 transitions. Word has length 273 [2019-10-13 18:05:39,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:39,729 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5791 transitions. [2019-10-13 18:05:39,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:39,729 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5791 transitions. [2019-10-13 18:05:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-10-13 18:05:39,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:39,736 INFO L380 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:05:39,940 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:39,940 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:39,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:39,941 INFO L82 PathProgramCache]: Analyzing trace with hash -628993500, now seen corresponding path program 1 times [2019-10-13 18:05:39,942 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:39,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002551946] [2019-10-13 18:05:39,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:39,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:39,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,454 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 183 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:40,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002551946] [2019-10-13 18:05:40,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813069287] [2019-10-13 18:05:40,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:40,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:40,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:40,678 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:40,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:40,678 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450339092] [2019-10-13 18:05:40,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:40,679 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:40,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:40,681 INFO L87 Difference]: Start difference. First operand 4198 states and 5791 transitions. Second operand 12 states. [2019-10-13 18:05:47,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:47,426 INFO L93 Difference]: Finished difference Result 13272 states and 19292 transitions. [2019-10-13 18:05:47,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:05:47,426 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 285 [2019-10-13 18:05:47,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:47,459 INFO L225 Difference]: With dead ends: 13272 [2019-10-13 18:05:47,460 INFO L226 Difference]: Without dead ends: 7642 [2019-10-13 18:05:47,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:05:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-13 18:05:47,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 5899. [2019-10-13 18:05:47,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5899 states. [2019-10-13 18:05:47,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5899 states to 5899 states and 6784 transitions. [2019-10-13 18:05:47,689 INFO L78 Accepts]: Start accepts. Automaton has 5899 states and 6784 transitions. Word has length 285 [2019-10-13 18:05:47,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:47,690 INFO L462 AbstractCegarLoop]: Abstraction has 5899 states and 6784 transitions. [2019-10-13 18:05:47,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:05:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 5899 states and 6784 transitions. [2019-10-13 18:05:47,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2019-10-13 18:05:47,720 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:47,721 INFO L380 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, 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, 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] [2019-10-13 18:05:47,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:47,926 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:47,927 INFO L82 PathProgramCache]: Analyzing trace with hash 797362899, now seen corresponding path program 1 times [2019-10-13 18:05:47,928 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:47,928 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142331878] [2019-10-13 18:05:47,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:47,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:47,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 196 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-13 18:05:48,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142331878] [2019-10-13 18:05:48,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460109678] [2019-10-13 18:05:48,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:48,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:48,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 891 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2019-10-13 18:05:49,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:49,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:49,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226318193] [2019-10-13 18:05:49,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:49,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:49,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:49,142 INFO L87 Difference]: Start difference. First operand 5899 states and 6784 transitions. Second operand 5 states. [2019-10-13 18:05:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:50,949 INFO L93 Difference]: Finished difference Result 13172 states and 15172 transitions. [2019-10-13 18:05:50,949 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:50,950 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 554 [2019-10-13 18:05:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:50,979 INFO L225 Difference]: With dead ends: 13172 [2019-10-13 18:05:50,979 INFO L226 Difference]: Without dead ends: 7279 [2019-10-13 18:05:50,995 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 558 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:51,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7279 states. [2019-10-13 18:05:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7279 to 7261. [2019-10-13 18:05:51,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7261 states. [2019-10-13 18:05:51,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7261 states to 7261 states and 8075 transitions. [2019-10-13 18:05:51,154 INFO L78 Accepts]: Start accepts. Automaton has 7261 states and 8075 transitions. Word has length 554 [2019-10-13 18:05:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:51,154 INFO L462 AbstractCegarLoop]: Abstraction has 7261 states and 8075 transitions. [2019-10-13 18:05:51,155 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 7261 states and 8075 transitions. [2019-10-13 18:05:51,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2019-10-13 18:05:51,177 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:51,178 INFO L380 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, 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, 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] [2019-10-13 18:05:51,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:51,382 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:51,382 INFO L82 PathProgramCache]: Analyzing trace with hash -543608489, now seen corresponding path program 1 times [2019-10-13 18:05:51,383 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:51,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751183226] [2019-10-13 18:05:51,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:51,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:51,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 316 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-13 18:05:52,603 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751183226] [2019-10-13 18:05:52,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679766593] [2019-10-13 18:05:52,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:52,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:52,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:52,794 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:53,178 INFO L134 CoverageAnalysis]: Checked inductivity of 894 backedges. 682 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 18:05:53,178 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:53,178 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:53,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183001772] [2019-10-13 18:05:53,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:53,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:53,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:53,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:53,181 INFO L87 Difference]: Start difference. First operand 7261 states and 8075 transitions. Second operand 11 states. [2019-10-13 18:05:58,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:58,262 INFO L93 Difference]: Finished difference Result 20488 states and 24277 transitions. [2019-10-13 18:05:58,263 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 18:05:58,263 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 668 [2019-10-13 18:05:58,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:58,325 INFO L225 Difference]: With dead ends: 20488 [2019-10-13 18:05:58,325 INFO L226 Difference]: Without dead ends: 13570 [2019-10-13 18:05:58,345 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 684 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-10-13 18:05:58,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13570 states.