/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/Problem01_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:31:05,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:31:05,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:31:05,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:31:05,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:31:05,300 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:31:05,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:31:05,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:31:05,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:31:05,303 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:31:05,305 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:31:05,306 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:31:05,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:31:05,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:31:05,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:31:05,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:31:05,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:31:05,322 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 22:31:05,335 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:31:05,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:31:05,337 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:31:05,337 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:31:05,337 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:31:05,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:31:05,339 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:31:05,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:31:05,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:31:05,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:31:05,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:31:05,340 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:31:05,340 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:31:05,340 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:31:05,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:31:05,340 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:31:05,341 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:31:05,341 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:31:05,341 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:31:05,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:31:05,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:31:05,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:31:05,344 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:31:05,344 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:31:05,344 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:31:05,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:31:05,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:31:05,345 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:31:05,346 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 22:31:05,609 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:31:05,622 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:31:05,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:31:05,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:31:05,627 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:31:05,628 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label44.c [2019-11-06 22:31:05,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7be3645d0/4617d316f0af4e248b69b4495466fe57/FLAG8570aa3fc [2019-11-06 22:31:06,234 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:31:06,234 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label44.c [2019-11-06 22:31:06,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7be3645d0/4617d316f0af4e248b69b4495466fe57/FLAG8570aa3fc [2019-11-06 22:31:06,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7be3645d0/4617d316f0af4e248b69b4495466fe57 [2019-11-06 22:31:06,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:31:06,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:31:06,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:06,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:31:06,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:31:06,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:06" (1/1) ... [2019-11-06 22:31:06,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55b8d5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:06, skipping insertion in model container [2019-11-06 22:31:06,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:06" (1/1) ... [2019-11-06 22:31:06,531 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:31:06,588 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:31:07,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:07,101 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:31:07,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:31:07,254 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:31:07,255 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07 WrapperNode [2019-11-06 22:31:07,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:31:07,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:31:07,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:31:07,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:31:07,267 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,268 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,293 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,294 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,334 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (1/1) ... [2019-11-06 22:31:07,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:31:07,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:31:07,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:31:07,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:31:07,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (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 22:31:07,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:31:07,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:31:07,417 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:31:07,417 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:31:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:31:07,417 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:31:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:31:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:31:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:31:07,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:31:07,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:31:08,584 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:31:08,585 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:31:08,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:08 BoogieIcfgContainer [2019-11-06 22:31:08,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:31:08,588 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:31:08,588 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:31:08,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:31:08,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:06" (1/3) ... [2019-11-06 22:31:08,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f845289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:08, skipping insertion in model container [2019-11-06 22:31:08,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:07" (2/3) ... [2019-11-06 22:31:08,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f845289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:08, skipping insertion in model container [2019-11-06 22:31:08,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:08" (3/3) ... [2019-11-06 22:31:08,595 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label44.c [2019-11-06 22:31:08,605 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:31:08,614 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:31:08,626 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:31:08,672 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:31:08,672 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:31:08,672 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:31:08,672 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:31:08,673 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:31:08,673 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:31:08,673 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:31:08,674 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:31:08,710 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:31:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 22:31:08,725 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:08,726 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] [2019-11-06 22:31:08,728 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:08,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1855725642, now seen corresponding path program 1 times [2019-11-06 22:31:08,746 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:08,746 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066010207] [2019-11-06 22:31:08,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:09,204 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 22:31:09,205 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066010207] [2019-11-06 22:31:09,206 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:09,206 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:09,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211913136] [2019-11-06 22:31:09,213 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:09,214 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:09,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:09,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:09,231 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-11-06 22:31:10,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:10,075 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:31:10,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:10,082 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-11-06 22:31:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:10,107 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:31:10,107 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:31:10,119 INFO L630 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 [2019-11-06 22:31:10,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:31:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:31:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:31:10,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-11-06 22:31:10,187 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 90 [2019-11-06 22:31:10,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:10,188 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-11-06 22:31:10,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-11-06 22:31:10,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-06 22:31:10,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:10,194 INFO L410 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] [2019-11-06 22:31:10,194 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:10,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:10,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1996722829, now seen corresponding path program 1 times [2019-11-06 22:31:10,195 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:10,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049273836] [2019-11-06 22:31:10,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:10,336 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049273836] [2019-11-06 22:31:10,336 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:10,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:31:10,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846216894] [2019-11-06 22:31:10,339 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:31:10,340 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:31:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:31:10,340 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-11-06 22:31:11,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:11,117 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-11-06 22:31:11,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:31:11,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-11-06 22:31:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:11,128 INFO L225 Difference]: With dead ends: 840 [2019-11-06 22:31:11,128 INFO L226 Difference]: Without dead ends: 568 [2019-11-06 22:31:11,130 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 22:31:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-06 22:31:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-11-06 22:31:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-11-06 22:31:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-11-06 22:31:11,185 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 100 [2019-11-06 22:31:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:11,185 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-11-06 22:31:11,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:31:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-11-06 22:31:11,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-06 22:31:11,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:11,190 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-06 22:31:11,190 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:11,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:11,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2111365455, now seen corresponding path program 1 times [2019-11-06 22:31:11,191 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:11,191 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165758509] [2019-11-06 22:31:11,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:11,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165758509] [2019-11-06 22:31:11,303 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:31:11,303 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:31:11,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782111865] [2019-11-06 22:31:11,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:31:11,306 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:31:11,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:31:11,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:31:11,307 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2019-11-06 22:31:11,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:31:11,813 INFO L93 Difference]: Finished difference Result 1513 states and 2162 transitions. [2019-11-06 22:31:11,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:31:11,813 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-11-06 22:31:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:31:11,820 INFO L225 Difference]: With dead ends: 1513 [2019-11-06 22:31:11,820 INFO L226 Difference]: Without dead ends: 963 [2019-11-06 22:31:11,822 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 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 22:31:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-11-06 22:31:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2019-11-06 22:31:11,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-11-06 22:31:11,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1279 transitions. [2019-11-06 22:31:11,871 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1279 transitions. Word has length 101 [2019-11-06 22:31:11,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:31:11,872 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1279 transitions. [2019-11-06 22:31:11,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:31:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1279 transitions. [2019-11-06 22:31:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:31:11,888 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:31:11,888 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:31:11,888 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:31:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:31:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1472223214, now seen corresponding path program 1 times [2019-11-06 22:31:11,890 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:31:11,890 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927325244] [2019-11-06 22:31:11,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:31:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:12,028 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927325244] [2019-11-06 22:31:12,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813115133] [2019-11-06 22:31:12,029 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 22:31:12,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:31:12,137 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 22:31:12,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:31:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:12,205 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:31:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:31:12,356 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1327686142] [2019-11-06 22:31:12,376 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 133 [2019-11-06 22:31:12,435 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:31:12,436 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)