/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:35:01,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:35:01,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:35:01,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:35:01,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:35:01,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:35:01,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:35:01,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:35:01,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:35:02,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:35:02,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:35:02,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:35:02,009 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:35:02,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:35:02,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:35:02,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:35:02,019 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:35:02,036 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 22:35:02,055 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:35:02,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:35:02,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:35:02,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:35:02,056 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:35:02,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:35:02,057 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:35:02,057 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:35:02,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:35:02,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:35:02,058 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:35:02,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:35:02,058 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:35:02,058 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:35:02,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:35:02,059 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:35:02,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:35:02,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:35:02,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:35:02,060 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:35:02,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:35:02,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:35:02,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:35:02,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:35:02,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:35:02,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:35:02,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:35:02,061 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:35:02,061 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 [2019-11-06 22:35:02,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:35:02,359 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:35:02,363 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:35:02,364 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:35:02,365 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:35:02,365 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2019-11-06 22:35:02,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a59aa326f/c379b537de414467bb03a39bb53179cb/FLAG6ad23b229 [2019-11-06 22:35:03,038 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:35:03,039 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label32.c [2019-11-06 22:35:03,056 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a59aa326f/c379b537de414467bb03a39bb53179cb/FLAG6ad23b229 [2019-11-06 22:35:03,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a59aa326f/c379b537de414467bb03a39bb53179cb [2019-11-06 22:35:03,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:35:03,291 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:35:03,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:35:03,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:35:03,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:35:03,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:35:03" (1/1) ... [2019-11-06 22:35:03,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d998f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:03, skipping insertion in model container [2019-11-06 22:35:03,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:35:03" (1/1) ... [2019-11-06 22:35:03,309 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:35:03,377 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:35:03,812 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:35:03,818 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:35:04,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:35:04,032 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:35:04,032 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04 WrapperNode [2019-11-06 22:35:04,032 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:35:04,033 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:35:04,033 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:35:04,033 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:35:04,048 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,048 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... [2019-11-06 22:35:04,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:35:04,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:35:04,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:35:04,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:35:04,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:35:04,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:35:04,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:35:04,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:35:04,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:35:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:35:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:35:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:35:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:35:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:35:04,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:35:04,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:35:05,356 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:35:05,356 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:35:05,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:35:05 BoogieIcfgContainer [2019-11-06 22:35:05,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:35:05,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:35:05,359 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:35:05,363 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:35:05,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:35:03" (1/3) ... [2019-11-06 22:35:05,364 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff39b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:35:05, skipping insertion in model container [2019-11-06 22:35:05,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:35:04" (2/3) ... [2019-11-06 22:35:05,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff39b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:35:05, skipping insertion in model container [2019-11-06 22:35:05,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:35:05" (3/3) ... [2019-11-06 22:35:05,367 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label32.c [2019-11-06 22:35:05,377 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:35:05,387 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:35:05,401 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:35:05,439 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:35:05,439 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:35:05,441 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:35:05,441 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:35:05,442 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:35:05,443 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:35:05,443 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:35:05,443 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:35:05,467 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-11-06 22:35:05,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-06 22:35:05,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:05,482 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:35:05,484 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:05,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2002898937, now seen corresponding path program 1 times [2019-11-06 22:35:05,500 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:05,500 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866721237] [2019-11-06 22:35:05,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:06,018 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866721237] [2019-11-06 22:35:06,019 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:35:06,019 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:35:06,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208901452] [2019-11-06 22:35:06,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:35:06,030 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:35:06,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:35:06,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:35:06,053 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-11-06 22:35:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:35:06,945 INFO L93 Difference]: Finished difference Result 623 states and 1065 transitions. [2019-11-06 22:35:06,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:35:06,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 115 [2019-11-06 22:35:06,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:35:06,967 INFO L225 Difference]: With dead ends: 623 [2019-11-06 22:35:06,967 INFO L226 Difference]: Without dead ends: 325 [2019-11-06 22:35:06,976 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:35:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-11-06 22:35:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2019-11-06 22:35:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-11-06 22:35:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 473 transitions. [2019-11-06 22:35:07,091 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 473 transitions. Word has length 115 [2019-11-06 22:35:07,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:35:07,092 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 473 transitions. [2019-11-06 22:35:07,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:35:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 473 transitions. [2019-11-06 22:35:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-06 22:35:07,098 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:07,098 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:35:07,099 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:07,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:07,099 INFO L82 PathProgramCache]: Analyzing trace with hash 906357460, now seen corresponding path program 1 times [2019-11-06 22:35:07,100 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:07,100 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877601524] [2019-11-06 22:35:07,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:07,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:07,236 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877601524] [2019-11-06 22:35:07,236 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:35:07,236 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:35:07,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994120454] [2019-11-06 22:35:07,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:35:07,239 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:35:07,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:35:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:35:07,239 INFO L87 Difference]: Start difference. First operand 321 states and 473 transitions. Second operand 6 states. [2019-11-06 22:35:08,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:35:08,052 INFO L93 Difference]: Finished difference Result 955 states and 1447 transitions. [2019-11-06 22:35:08,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:35:08,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2019-11-06 22:35:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:35:08,061 INFO L225 Difference]: With dead ends: 955 [2019-11-06 22:35:08,061 INFO L226 Difference]: Without dead ends: 640 [2019-11-06 22:35:08,063 INFO L630 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 [2019-11-06 22:35:08,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-11-06 22:35:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 623. [2019-11-06 22:35:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-11-06 22:35:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 903 transitions. [2019-11-06 22:35:08,108 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 903 transitions. Word has length 135 [2019-11-06 22:35:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:35:08,108 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 903 transitions. [2019-11-06 22:35:08,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:35:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 903 transitions. [2019-11-06 22:35:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-11-06 22:35:08,113 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:08,114 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:35:08,114 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:08,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1019013890, now seen corresponding path program 1 times [2019-11-06 22:35:08,115 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:08,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900761563] [2019-11-06 22:35:08,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:35:08,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900761563] [2019-11-06 22:35:08,291 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443267695] [2019-11-06 22:35:08,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:35:08,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:08,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:35:08,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:35:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:08,532 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:35:08,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:08,636 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:35:08,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-06 22:35:08,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356928229] [2019-11-06 22:35:08,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:35:08,639 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:35:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:35:08,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:35:08,640 INFO L87 Difference]: Start difference. First operand 623 states and 903 transitions. Second operand 3 states. [2019-11-06 22:35:09,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:35:09,229 INFO L93 Difference]: Finished difference Result 1676 states and 2455 transitions. [2019-11-06 22:35:09,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:35:09,230 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2019-11-06 22:35:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:35:09,237 INFO L225 Difference]: With dead ends: 1676 [2019-11-06 22:35:09,237 INFO L226 Difference]: Without dead ends: 1059 [2019-11-06 22:35:09,238 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:35:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2019-11-06 22:35:09,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 767. [2019-11-06 22:35:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2019-11-06 22:35:09,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1111 transitions. [2019-11-06 22:35:09,270 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1111 transitions. Word has length 136 [2019-11-06 22:35:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:35:09,271 INFO L462 AbstractCegarLoop]: Abstraction has 767 states and 1111 transitions. [2019-11-06 22:35:09,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:35:09,271 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1111 transitions. [2019-11-06 22:35:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 22:35:09,276 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:35:09,276 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:35:09,479 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:35:09,479 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:35:09,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:35:09,480 INFO L82 PathProgramCache]: Analyzing trace with hash 70547790, now seen corresponding path program 1 times [2019-11-06 22:35:09,480 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:35:09,481 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938799108] [2019-11-06 22:35:09,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:35:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:09,621 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 22:35:09,621 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938799108] [2019-11-06 22:35:09,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175536620] [2019-11-06 22:35:09,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:35:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:35:09,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:35:09,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:35:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:09,817 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:35:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:35:09,939 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1000121852] [2019-11-06 22:35:09,945 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 179 [2019-11-06 22:35:10,009 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:35:10,009 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)