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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:51:20,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:51:20,236 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:51:20,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:51:20,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:51:20,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:51:20,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:51:20,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:51:20,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:51:20,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:51:20,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:51:20,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:51:20,270 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:51:20,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:51:20,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:51:20,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:51:20,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:51:20,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:51:20,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:51:20,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:51:20,286 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 [2019-10-15 01:51:20,304 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:51:20,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:51:20,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:51:20,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:51:20,306 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:51:20,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:51:20,307 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:51:20,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:51:20,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:51:20,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:51:20,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:51:20,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:51:20,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:51:20,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:51:20,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:51:20,310 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:51:20,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:51:20,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:51:20,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:51:20,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:51:20,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:51:20,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:20,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:51:20,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:51:20,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:51:20,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:51:20,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:51:20,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:51:20,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:51:20,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:51:20,630 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:51:20,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:51:20,635 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:51:20,635 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:51:20,636 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-10-15 01:51:20,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af86215b/261810cb47dd4a38ae835495b5d1490b/FLAG892c85c5b [2019-10-15 01:51:21,498 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:51:21,499 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c [2019-10-15 01:51:21,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af86215b/261810cb47dd4a38ae835495b5d1490b/FLAG892c85c5b [2019-10-15 01:51:22,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af86215b/261810cb47dd4a38ae835495b5d1490b [2019-10-15 01:51:22,047 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:51:22,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:51:22,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:22,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:51:22,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:51:22,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3d015c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:22, skipping insertion in model container [2019-10-15 01:51:22,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:22" (1/1) ... [2019-10-15 01:51:22,065 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:51:22,204 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:51:23,703 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:23,716 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:51:24,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:24,386 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:51:24,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24 WrapperNode [2019-10-15 01:51:24,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:24,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:51:24,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:51:24,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:51:24,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,626 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (1/1) ... [2019-10-15 01:51:24,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:51:24,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:51:24,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:51:24,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:51:24,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (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 [2019-10-15 01:51:24,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:51:24,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:51:24,770 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:51:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:51:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:51:24,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:51:24,772 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:51:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:51:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:51:24,772 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:51:24,773 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:51:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:51:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:51:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:51:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:51:24,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:51:24,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:51:31,471 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:51:31,475 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:51:31,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:31 BoogieIcfgContainer [2019-10-15 01:51:31,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:51:31,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:51:31,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:51:31,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:51:31,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:51:22" (1/3) ... [2019-10-15 01:51:31,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac4a5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:31, skipping insertion in model container [2019-10-15 01:51:31,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:24" (2/3) ... [2019-10-15 01:51:31,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ac4a5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:31, skipping insertion in model container [2019-10-15 01:51:31,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:31" (3/3) ... [2019-10-15 01:51:31,490 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label36.c [2019-10-15 01:51:31,506 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:51:31,516 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:51:31,531 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:51:31,582 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:51:31,582 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:51:31,582 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:51:31,583 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:51:31,583 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:51:31,583 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:51:31,583 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:51:31,584 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:51:31,635 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:51:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:51:31,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:31,645 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:31,647 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:31,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:31,657 INFO L82 PathProgramCache]: Analyzing trace with hash -874905522, now seen corresponding path program 1 times [2019-10-15 01:51:31,672 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:31,673 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316729236] [2019-10-15 01:51:31,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:31,673 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:31,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:32,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316729236] [2019-10-15 01:51:32,136 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:32,136 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:51:32,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322530803] [2019-10-15 01:51:32,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:51:32,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:51:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:51:32,164 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-15 01:51:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:37,303 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-15 01:51:37,304 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:51:37,305 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:51:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:37,339 INFO L225 Difference]: With dead ends: 2068 [2019-10-15 01:51:37,339 INFO L226 Difference]: Without dead ends: 1371 [2019-10-15 01:51:37,350 INFO L600 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 [2019-10-15 01:51:37,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-15 01:51:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1365. [2019-10-15 01:51:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1365 states. [2019-10-15 01:51:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1365 states to 1365 states and 2477 transitions. [2019-10-15 01:51:37,484 INFO L78 Accepts]: Start accepts. Automaton has 1365 states and 2477 transitions. Word has length 11 [2019-10-15 01:51:37,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:37,484 INFO L462 AbstractCegarLoop]: Abstraction has 1365 states and 2477 transitions. [2019-10-15 01:51:37,485 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:51:37,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1365 states and 2477 transitions. [2019-10-15 01:51:37,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:51:37,487 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:37,487 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:37,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:37,488 INFO L82 PathProgramCache]: Analyzing trace with hash -792374107, now seen corresponding path program 1 times [2019-10-15 01:51:37,488 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:37,489 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835959248] [2019-10-15 01:51:37,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:37,489 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:37,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:37,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:37,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835959248] [2019-10-15 01:51:37,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430479936] [2019-10-15 01:51:37,660 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 [2019-10-15 01:51:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:37,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:51:37,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:51:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:37,836 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:51:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:37,876 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:51:37,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-15 01:51:37,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666340218] [2019-10-15 01:51:37,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:51:37,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:51:37,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:51:37,880 INFO L87 Difference]: Start difference. First operand 1365 states and 2477 transitions. Second operand 3 states. [2019-10-15 01:51:43,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:43,107 INFO L93 Difference]: Finished difference Result 4081 states and 7455 transitions. [2019-10-15 01:51:43,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:51:43,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2019-10-15 01:51:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:43,128 INFO L225 Difference]: With dead ends: 4081 [2019-10-15 01:51:43,129 INFO L226 Difference]: Without dead ends: 2721 [2019-10-15 01:51:43,133 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:51:43,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2721 states. [2019-10-15 01:51:43,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2721 to 2718. [2019-10-15 01:51:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2718 states. [2019-10-15 01:51:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2718 states to 2718 states and 4631 transitions. [2019-10-15 01:51:43,229 INFO L78 Accepts]: Start accepts. Automaton has 2718 states and 4631 transitions. Word has length 27 [2019-10-15 01:51:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:43,231 INFO L462 AbstractCegarLoop]: Abstraction has 2718 states and 4631 transitions. [2019-10-15 01:51:43,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:51:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 2718 states and 4631 transitions. [2019-10-15 01:51:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:51:43,234 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:43,235 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:51:43,442 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:51:43,442 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:43,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:43,443 INFO L82 PathProgramCache]: Analyzing trace with hash 846430429, now seen corresponding path program 1 times [2019-10-15 01:51:43,444 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:43,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750900037] [2019-10-15 01:51:43,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:43,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:43,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:43,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750900037] [2019-10-15 01:51:43,576 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:43,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:51:43,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907247195] [2019-10-15 01:51:43,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:43,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:43,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:51:43,579 INFO L87 Difference]: Start difference. First operand 2718 states and 4631 transitions. Second operand 5 states. [2019-10-15 01:51:50,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:50,573 INFO L93 Difference]: Finished difference Result 8254 states and 14243 transitions. [2019-10-15 01:51:50,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:51:50,576 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2019-10-15 01:51:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:50,608 INFO L225 Difference]: With dead ends: 8254 [2019-10-15 01:51:50,608 INFO L226 Difference]: Without dead ends: 5541 [2019-10-15 01:51:50,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:51:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5541 states. [2019-10-15 01:51:50,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5541 to 5489. [2019-10-15 01:51:50,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5489 states. [2019-10-15 01:51:50,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5489 states to 5489 states and 8544 transitions. [2019-10-15 01:51:50,793 INFO L78 Accepts]: Start accepts. Automaton has 5489 states and 8544 transitions. Word has length 31 [2019-10-15 01:51:50,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:50,794 INFO L462 AbstractCegarLoop]: Abstraction has 5489 states and 8544 transitions. [2019-10-15 01:51:50,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:51:50,795 INFO L276 IsEmpty]: Start isEmpty. Operand 5489 states and 8544 transitions. [2019-10-15 01:51:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-15 01:51:50,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:50,804 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 01:51:50,804 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:50,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1979349910, now seen corresponding path program 1 times [2019-10-15 01:51:50,805 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:50,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611133703] [2019-10-15 01:51:50,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:50,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:50,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:50,967 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611133703] [2019-10-15 01:51:50,967 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:50,967 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:51:50,967 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223559369] [2019-10-15 01:51:50,968 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:50,968 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:50,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:50,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:51:50,969 INFO L87 Difference]: Start difference. First operand 5489 states and 8544 transitions. Second operand 5 states.