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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:52:59,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:52:59,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:52:59,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 23:52:59,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:52:59,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:52:59,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:52:59,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:52:59,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:52:59,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:52:59,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:52:59,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:52:59,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:52:59,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:52:59,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:52:59,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:52:59,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:52:59,994 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:52:59,995 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:52:59,996 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:52:59,997 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 [2019-10-14 23:53:00,014 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:00,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:00,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:00,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:00,016 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:00,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:00,016 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:00,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:00,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:00,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:00,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:00,018 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:00,018 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:00,019 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:00,019 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:00,019 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:00,019 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:00,019 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:00,020 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:00,020 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:00,020 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:00,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:00,021 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:00,021 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:00,021 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:00,022 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:00,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:00,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:00,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:53:00,342 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:00,363 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:00,367 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:00,368 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:00,369 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:00,369 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label01.c [2019-10-14 23:53:00,438 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faeed6ad5/484b8c6ff53442a29f7a457558cacf3b/FLAG5f13a3499 [2019-10-14 23:53:01,046 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:01,047 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label01.c [2019-10-14 23:53:01,064 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faeed6ad5/484b8c6ff53442a29f7a457558cacf3b/FLAG5f13a3499 [2019-10-14 23:53:01,237 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/faeed6ad5/484b8c6ff53442a29f7a457558cacf3b [2019-10-14 23:53:01,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:01,249 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:01,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:01,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:01,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:01,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:01,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d46bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01, skipping insertion in model container [2019-10-14 23:53:01,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:01,264 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:01,315 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:01,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:01,866 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:01,964 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:01,981 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:01,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01 WrapperNode [2019-10-14 23:53:01,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:01,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:01,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:01,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:01,994 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:01,995 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:02,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:02,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:02,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:02,069 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:02,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (1/1) ... [2019-10-14 23:53:02,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:02,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:02,081 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:02,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:02,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (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 [2019-10-14 23:53:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:02,136 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:02,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:02,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:03,336 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:03,337 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:03,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:03 BoogieIcfgContainer [2019-10-14 23:53:03,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:03,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:03,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:03,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:03,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:01" (1/3) ... [2019-10-14 23:53:03,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440daa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:03, skipping insertion in model container [2019-10-14 23:53:03,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:01" (2/3) ... [2019-10-14 23:53:03,349 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@440daa1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:03, skipping insertion in model container [2019-10-14 23:53:03,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:03" (3/3) ... [2019-10-14 23:53:03,361 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label01.c [2019-10-14 23:53:03,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:03,387 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:03,399 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:03,427 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:03,427 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:03,427 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:03,427 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:03,428 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:03,428 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:03,428 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:03,428 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:03,462 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:03,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 23:53:03,478 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:03,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:03,481 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:03,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:03,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1291410423, now seen corresponding path program 1 times [2019-10-14 23:53:03,498 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:03,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668829353] [2019-10-14 23:53:03,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:03,499 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:03,499 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:04,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668829353] [2019-10-14 23:53:04,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:04,004 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:04,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645471907] [2019-10-14 23:53:04,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:04,011 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:04,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:04,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:04,029 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:04,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:04,916 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:04,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:04,918 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-14 23:53:04,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:04,945 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:04,945 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:04,958 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:04,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:05,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:05,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:53:05,067 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 97 [2019-10-14 23:53:05,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:05,069 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:53:05,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:05,070 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:53:05,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 23:53:05,084 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:05,086 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:53:05,086 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:05,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1976179008, now seen corresponding path program 1 times [2019-10-14 23:53:05,088 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:05,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491788985] [2019-10-14 23:53:05,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:05,088 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:05,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:05,260 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491788985] [2019-10-14 23:53:05,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:05,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:05,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053113363] [2019-10-14 23:53:05,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:05,263 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:05,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:05,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:05,264 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:53:06,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:06,124 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:53:06,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:06,125 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-10-14 23:53:06,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:06,131 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:53:06,132 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:53:06,134 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:53:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:53:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:53:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:53:06,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 784 transitions. [2019-10-14 23:53:06,169 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 784 transitions. Word has length 107 [2019-10-14 23:53:06,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:06,169 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 784 transitions. [2019-10-14 23:53:06,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:06,169 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 784 transitions. [2019-10-14 23:53:06,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:53:06,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:06,172 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 23:53:06,173 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:06,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1428195665, now seen corresponding path program 1 times [2019-10-14 23:53:06,174 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:06,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579357728] [2019-10-14 23:53:06,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,174 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:06,174 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:06,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579357728] [2019-10-14 23:53:06,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236940540] [2019-10-14 23:53:06,301 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 [2019-10-14 23:53:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:06,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:06,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:53:06,567 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:53:06,623 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:53:06,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:53:06,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298274443] [2019-10-14 23:53:06,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:06,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:06,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:06,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:53:06,625 INFO L87 Difference]: Start difference. First operand 556 states and 784 transitions. Second operand 3 states. [2019-10-14 23:53:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:07,202 INFO L93 Difference]: Finished difference Result 1650 states and 2377 transitions. [2019-10-14 23:53:07,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:07,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 131 [2019-10-14 23:53:07,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:07,212 INFO L225 Difference]: With dead ends: 1650 [2019-10-14 23:53:07,213 INFO L226 Difference]: Without dead ends: 1100 [2019-10-14 23:53:07,215 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:53:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2019-10-14 23:53:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2019-10-14 23:53:07,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1100 states. [2019-10-14 23:53:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1508 transitions. [2019-10-14 23:53:07,258 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1508 transitions. Word has length 131 [2019-10-14 23:53:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:07,258 INFO L462 AbstractCegarLoop]: Abstraction has 1100 states and 1508 transitions. [2019-10-14 23:53:07,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1508 transitions. [2019-10-14 23:53:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:53:07,267 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:07,267 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:07,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:53:07,469 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:07,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:07,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1528516029, now seen corresponding path program 1 times [2019-10-14 23:53:07,470 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:07,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484053482] [2019-10-14 23:53:07,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,471 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:07,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:07,662 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:07,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484053482] [2019-10-14 23:53:07,663 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852858541] [2019-10-14 23:53:07,663 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 [2019-10-14 23:53:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:07,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:07,798 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:07,876 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:08,026 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [235044400] [2019-10-14 23:53:08,034 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 181 [2019-10-14 23:53:08,078 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:08,078 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)