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/Problem03_label08.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:19,633 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:19,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:19,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:19,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:19,725 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 01:43:19,745 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:19,745 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:19,747 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:19,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:19,748 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:19,748 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:19,748 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:19,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:19,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:19,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:19,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:19,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:19,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:19,751 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:19,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:19,751 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:19,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:19,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:19,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:19,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:19,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:19,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:19,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:19,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:19,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:19,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:19,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:19,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:19,754 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 01:43:20,030 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:20,044 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:20,047 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:20,049 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:20,049 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:20,050 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-15 01:43:20,131 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe2fe2e0/74496477c08f46cfa92bae9d851b9585/FLAG5f9ec09b4 [2019-10-15 01:43:20,788 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:20,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label08.c [2019-10-15 01:43:20,811 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe2fe2e0/74496477c08f46cfa92bae9d851b9585/FLAG5f9ec09b4 [2019-10-15 01:43:21,024 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe2fe2e0/74496477c08f46cfa92bae9d851b9585 [2019-10-15 01:43:21,037 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:21,039 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:21,040 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:21,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:21,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:21,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:21" (1/1) ... [2019-10-15 01:43:21,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c76a8b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:21, skipping insertion in model container [2019-10-15 01:43:21,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:21" (1/1) ... [2019-10-15 01:43:21,057 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:21,146 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:21,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:21,943 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:22,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:22,264 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:22,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22 WrapperNode [2019-10-15 01:43:22,266 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:22,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:22,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:22,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:22,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (1/1) ... [2019-10-15 01:43:22,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:22,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:22,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:22,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:22,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (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 01:43:22,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:22,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:22,531 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:22,531 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:22,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:22,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:43:25,540 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:43:25,541 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:43:25,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:25 BoogieIcfgContainer [2019-10-15 01:43:25,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:43:25,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:43:25,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:43:25,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:43:25,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:21" (1/3) ... [2019-10-15 01:43:25,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba5734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:25, skipping insertion in model container [2019-10-15 01:43:25,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:22" (2/3) ... [2019-10-15 01:43:25,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba5734f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:43:25, skipping insertion in model container [2019-10-15 01:43:25,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:43:25" (3/3) ... [2019-10-15 01:43:25,556 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label08.c [2019-10-15 01:43:25,566 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:43:25,574 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:43:25,585 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:43:25,613 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:43:25,613 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:43:25,613 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:43:25,613 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:43:25,613 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:43:25,614 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:43:25,614 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:43:25,614 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:43:25,636 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:43:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:43:25,650 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:25,651 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:25,653 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:25,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:25,659 INFO L82 PathProgramCache]: Analyzing trace with hash 136467238, now seen corresponding path program 1 times [2019-10-15 01:43:25,669 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:25,669 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749014986] [2019-10-15 01:43:25,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:25,670 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:25,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:26,311 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 01:43:26,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749014986] [2019-10-15 01:43:26,314 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:26,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:26,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375087321] [2019-10-15 01:43:26,319 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:26,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:26,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:26,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:26,333 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:43:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:27,416 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:43:27,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:27,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:43:27,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:27,449 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:43:27,449 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:43:27,456 INFO L600 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 [2019-10-15 01:43:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:43:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:43:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:43:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 564 transitions. [2019-10-15 01:43:27,540 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 564 transitions. Word has length 149 [2019-10-15 01:43:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:27,542 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 564 transitions. [2019-10-15 01:43:27,542 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 564 transitions. [2019-10-15 01:43:27,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:43:27,547 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:27,548 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:27,548 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:27,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:27,548 INFO L82 PathProgramCache]: Analyzing trace with hash 558837181, now seen corresponding path program 1 times [2019-10-15 01:43:27,549 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:27,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427102941] [2019-10-15 01:43:27,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:27,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:27,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:27,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:27,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427102941] [2019-10-15 01:43:27,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:27,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:43:27,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123919364] [2019-10-15 01:43:27,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:43:27,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:27,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:43:27,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:43:27,732 INFO L87 Difference]: Start difference. First operand 301 states and 564 transitions. Second operand 6 states. [2019-10-15 01:43:29,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:29,112 INFO L93 Difference]: Finished difference Result 929 states and 1794 transitions. [2019-10-15 01:43:29,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:29,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 158 [2019-10-15 01:43:29,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:29,129 INFO L225 Difference]: With dead ends: 929 [2019-10-15 01:43:29,129 INFO L226 Difference]: Without dead ends: 633 [2019-10-15 01:43:29,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:43:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-15 01:43:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 603. [2019-10-15 01:43:29,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2019-10-15 01:43:29,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1113 transitions. [2019-10-15 01:43:29,238 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1113 transitions. Word has length 158 [2019-10-15 01:43:29,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:29,240 INFO L462 AbstractCegarLoop]: Abstraction has 603 states and 1113 transitions. [2019-10-15 01:43:29,240 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:43:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1113 transitions. [2019-10-15 01:43:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:43:29,250 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:29,251 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:29,251 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:29,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1532434670, now seen corresponding path program 1 times [2019-10-15 01:43:29,252 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:29,252 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159463017] [2019-10-15 01:43:29,252 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:29,253 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:29,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:29,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159463017] [2019-10-15 01:43:29,529 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:43:29,529 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:43:29,530 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243309478] [2019-10-15 01:43:29,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:29,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:29,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:43:29,537 INFO L87 Difference]: Start difference. First operand 603 states and 1113 transitions. Second operand 3 states. [2019-10-15 01:43:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:30,532 INFO L93 Difference]: Finished difference Result 1793 states and 3387 transitions. [2019-10-15 01:43:30,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:30,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:43:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:30,541 INFO L225 Difference]: With dead ends: 1793 [2019-10-15 01:43:30,542 INFO L226 Difference]: Without dead ends: 1195 [2019-10-15 01:43:30,544 INFO L600 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 [2019-10-15 01:43:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-10-15 01:43:30,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1195. [2019-10-15 01:43:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1195 states. [2019-10-15 01:43:30,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 2172 transitions. [2019-10-15 01:43:30,599 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 2172 transitions. Word has length 161 [2019-10-15 01:43:30,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:30,600 INFO L462 AbstractCegarLoop]: Abstraction has 1195 states and 2172 transitions. [2019-10-15 01:43:30,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:30,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 2172 transitions. [2019-10-15 01:43:30,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:43:30,607 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:30,607 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:43:30,607 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:30,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1729527359, now seen corresponding path program 1 times [2019-10-15 01:43:30,608 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:30,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036527730] [2019-10-15 01:43:30,608 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:30,609 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:30,609 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:30,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036527730] [2019-10-15 01:43:30,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156211186] [2019-10-15 01:43:30,775 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 01:43:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:31,031 INFO L256 TraceCheckSpWp]: Trace formula consists of 1015 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:43:31,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:31,146 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:43:31,146 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:31,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:43:31,234 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:43:31,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:43:31,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978609877] [2019-10-15 01:43:31,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:43:31,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:31,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:43:31,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:43:31,237 INFO L87 Difference]: Start difference. First operand 1195 states and 2172 transitions. Second operand 3 states. [2019-10-15 01:43:32,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:32,237 INFO L93 Difference]: Finished difference Result 3571 states and 6683 transitions. [2019-10-15 01:43:32,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:43:32,239 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2019-10-15 01:43:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:32,254 INFO L225 Difference]: With dead ends: 3571 [2019-10-15 01:43:32,254 INFO L226 Difference]: Without dead ends: 2381 [2019-10-15 01:43:32,257 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:43:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2381 states. [2019-10-15 01:43:32,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2381 to 2381. [2019-10-15 01:43:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2381 states. [2019-10-15 01:43:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 4354 transitions. [2019-10-15 01:43:32,333 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 4354 transitions. Word has length 178 [2019-10-15 01:43:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:32,334 INFO L462 AbstractCegarLoop]: Abstraction has 2381 states and 4354 transitions. [2019-10-15 01:43:32,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:43:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 4354 transitions. [2019-10-15 01:43:32,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-15 01:43:32,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:32,344 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:32,548 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:32,549 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1513048515, now seen corresponding path program 1 times [2019-10-15 01:43:32,550 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:32,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608102742] [2019-10-15 01:43:32,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:32,551 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:32,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:32,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608102742] [2019-10-15 01:43:32,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621795411] [2019-10-15 01:43:32,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:33,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:43:33,030 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:43:33,267 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 44 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:33,427 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:33,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:43:33,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682020132] [2019-10-15 01:43:33,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:33,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:33,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:43:33,432 INFO L87 Difference]: Start difference. First operand 2381 states and 4354 transitions. Second operand 5 states. [2019-10-15 01:43:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:34,828 INFO L93 Difference]: Finished difference Result 6055 states and 11499 transitions. [2019-10-15 01:43:34,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:43:34,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 199 [2019-10-15 01:43:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:34,856 INFO L225 Difference]: With dead ends: 6055 [2019-10-15 01:43:34,856 INFO L226 Difference]: Without dead ends: 3679 [2019-10-15 01:43:34,864 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 395 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:43:34,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3679 states. [2019-10-15 01:43:34,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3679 to 3641. [2019-10-15 01:43:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3641 states. [2019-10-15 01:43:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 6742 transitions. [2019-10-15 01:43:34,990 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 6742 transitions. Word has length 199 [2019-10-15 01:43:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:34,990 INFO L462 AbstractCegarLoop]: Abstraction has 3641 states and 6742 transitions. [2019-10-15 01:43:34,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 6742 transitions. [2019-10-15 01:43:35,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-10-15 01:43:35,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:35,004 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:35,208 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:35,209 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1312405658, now seen corresponding path program 1 times [2019-10-15 01:43:35,210 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:35,210 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046168058] [2019-10-15 01:43:35,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:35,213 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:35,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:35,416 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046168058] [2019-10-15 01:43:35,417 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594534876] [2019-10-15 01:43:35,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:35,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 1026 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:43:35,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-15 01:43:35,696 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:35,785 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:43:35,785 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 01:43:35,785 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56799633] [2019-10-15 01:43:35,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:43:35,786 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:43:35,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:43:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:43:35,787 INFO L87 Difference]: Start difference. First operand 3641 states and 6742 transitions. Second operand 5 states. [2019-10-15 01:43:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:43:37,244 INFO L93 Difference]: Finished difference Result 10626 states and 21377 transitions. [2019-10-15 01:43:37,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 01:43:37,245 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 200 [2019-10-15 01:43:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:43:37,303 INFO L225 Difference]: With dead ends: 10626 [2019-10-15 01:43:37,303 INFO L226 Difference]: Without dead ends: 6990 [2019-10-15 01:43:37,319 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 395 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-15 01:43:37,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6990 states. [2019-10-15 01:43:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6990 to 6892. [2019-10-15 01:43:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6892 states. [2019-10-15 01:43:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6892 states to 6892 states and 12420 transitions. [2019-10-15 01:43:37,595 INFO L78 Accepts]: Start accepts. Automaton has 6892 states and 12420 transitions. Word has length 200 [2019-10-15 01:43:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:43:37,595 INFO L462 AbstractCegarLoop]: Abstraction has 6892 states and 12420 transitions. [2019-10-15 01:43:37,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:43:37,596 INFO L276 IsEmpty]: Start isEmpty. Operand 6892 states and 12420 transitions. [2019-10-15 01:43:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-15 01:43:37,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:43:37,619 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:43:37,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:37,824 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:43:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:43:37,824 INFO L82 PathProgramCache]: Analyzing trace with hash 796891807, now seen corresponding path program 1 times [2019-10-15 01:43:37,824 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:43:37,825 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157714375] [2019-10-15 01:43:37,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,825 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:43:37,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:43:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:43:37,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157714375] [2019-10-15 01:43:37,954 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464834611] [2019-10-15 01:43:37,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:43:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:43:38,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:43:38,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:43:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:38,259 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:43:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:43:38,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1185352549] [2019-10-15 01:43:38,601 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:43:38,601 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:43:38,610 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:43:38,623 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:43:38,624 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:43:39,443 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-15 01:43:39,709 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:43:39,974 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 231 [2019-10-15 01:43:40,095 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:43:40,414 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:43:40,727 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 278 [2019-10-15 01:43:43,390 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 250 [2019-10-15 01:43:43,656 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 246 [2019-10-15 01:43:44,098 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 210 [2019-10-15 01:43:45,362 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 360 [2019-10-15 01:43:45,466 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:43:45,571 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:43:45,770 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-10-15 01:43:46,820 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 209 [2019-10-15 01:43:47,271 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 250 [2019-10-15 01:43:47,900 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 360 [2019-10-15 01:43:48,036 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-10-15 01:43:48,172 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-10-15 01:43:48,484 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-10-15 01:43:50,155 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 361 [2019-10-15 01:43:50,268 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-10-15 01:43:50,444 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-10-15 01:43:50,836 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 365 [2019-10-15 01:43:51,653 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 210 [2019-10-15 01:43:52,430 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 361 [2019-10-15 01:43:52,669 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361