/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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/Problem01_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:36:09,417 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:36:09,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:36:09,461 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:36:09,462 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:36:09,463 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:36:09,464 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:36:09,465 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:36:09,467 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:36:09,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:36:09,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:36:09,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:36:09,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:36:09,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:36:09,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:36:09,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:36:09,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:36:09,492 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:36:09,492 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-07 01:36:09,523 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:36:09,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:36:09,527 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:36:09,527 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:36:09,527 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:36:09,527 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:36:09,528 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:36:09,528 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:36:09,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:36:09,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:36:09,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:36:09,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:36:09,529 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:36:09,529 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:36:09,529 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:36:09,529 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:36:09,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:36:09,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:36:09,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:36:09,530 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:36:09,530 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:36:09,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:36:09,532 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:36:09,533 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:36:09,533 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:36:09,533 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:36:09,534 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:36:09,534 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:36:09,534 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 [2019-11-07 01:36:09,822 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:36:09,843 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:36:09,847 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:36:09,849 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:36:09,849 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:36:09,850 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label44.c [2019-11-07 01:36:09,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a064db06a/fba7ba4450224abda544c75b28d536fb/FLAGae10dc7a4 [2019-11-07 01:36:10,487 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:36:10,490 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label44.c [2019-11-07 01:36:10,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a064db06a/fba7ba4450224abda544c75b28d536fb/FLAGae10dc7a4 [2019-11-07 01:36:10,763 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a064db06a/fba7ba4450224abda544c75b28d536fb [2019-11-07 01:36:10,776 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:36:10,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:36:10,789 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:36:10,790 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:36:10,794 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:36:10,795 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:10" (1/1) ... [2019-11-07 01:36:10,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab07c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:10, skipping insertion in model container [2019-11-07 01:36:10,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:36:10" (1/1) ... [2019-11-07 01:36:10,809 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:36:10,860 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:36:11,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:36:11,377 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:36:11,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:36:11,479 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:36:11,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11 WrapperNode [2019-11-07 01:36:11,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:36:11,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:36:11,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:36:11,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:36:11,493 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,564 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,586 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... [2019-11-07 01:36:11,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:36:11,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:36:11,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:36:11,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:36:11,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:36:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:36:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:36:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:36:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:36:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:36:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:36:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:36:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:36:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:36:11,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:36:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:36:13,533 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:36:13,533 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:36:13,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:13 BoogieIcfgContainer [2019-11-07 01:36:13,535 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:36:13,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:36:13,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:36:13,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:36:13,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:36:10" (1/3) ... [2019-11-07 01:36:13,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7585e817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:13, skipping insertion in model container [2019-11-07 01:36:13,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:36:11" (2/3) ... [2019-11-07 01:36:13,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7585e817 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:36:13, skipping insertion in model container [2019-11-07 01:36:13,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:36:13" (3/3) ... [2019-11-07 01:36:13,543 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label44.c [2019-11-07 01:36:13,553 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:36:13,561 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:36:13,573 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:36:13,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:36:13,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:36:13,598 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:36:13,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:36:13,599 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:36:13,599 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:36:13,599 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:36:13,599 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:36:13,622 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-11-07 01:36:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-07 01:36:13,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:13,635 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:36:13,638 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash 826811425, now seen corresponding path program 1 times [2019-11-07 01:36:13,659 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:13,659 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484693553] [2019-11-07 01:36:13,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:14,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:14,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484693553] [2019-11-07 01:36:14,125 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:14,125 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:36:14,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142146717] [2019-11-07 01:36:14,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:36:14,132 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:14,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:36:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:14,149 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-11-07 01:36:14,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:14,609 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-11-07 01:36:14,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:36:14,613 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-11-07 01:36:14,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:14,636 INFO L225 Difference]: With dead ends: 246 [2019-11-07 01:36:14,636 INFO L226 Difference]: Without dead ends: 157 [2019-11-07 01:36:14,644 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-07 01:36:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-11-07 01:36:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-11-07 01:36:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 273 transitions. [2019-11-07 01:36:14,743 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 273 transitions. Word has length 77 [2019-11-07 01:36:14,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:14,745 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 273 transitions. [2019-11-07 01:36:14,745 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:36:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 273 transitions. [2019-11-07 01:36:14,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-07 01:36:14,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:14,754 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:36:14,754 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:14,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:14,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1195675208, now seen corresponding path program 1 times [2019-11-07 01:36:14,755 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:14,756 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268842625] [2019-11-07 01:36:14,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:14,940 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268842625] [2019-11-07 01:36:14,940 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:14,940 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:36:14,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56494412] [2019-11-07 01:36:14,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:36:14,943 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:14,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:36:14,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:36:14,943 INFO L87 Difference]: Start difference. First operand 157 states and 273 transitions. Second operand 6 states. [2019-11-07 01:36:15,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:15,598 INFO L93 Difference]: Finished difference Result 479 states and 861 transitions. [2019-11-07 01:36:15,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:36:15,598 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2019-11-07 01:36:15,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:15,603 INFO L225 Difference]: With dead ends: 479 [2019-11-07 01:36:15,604 INFO L226 Difference]: Without dead ends: 327 [2019-11-07 01:36:15,606 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-07 01:36:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-11-07 01:36:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 315. [2019-11-07 01:36:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2019-11-07 01:36:15,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 544 transitions. [2019-11-07 01:36:15,655 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 544 transitions. Word has length 87 [2019-11-07 01:36:15,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:15,655 INFO L462 AbstractCegarLoop]: Abstraction has 315 states and 544 transitions. [2019-11-07 01:36:15,656 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:36:15,656 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 544 transitions. [2019-11-07 01:36:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-11-07 01:36:15,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:15,662 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:36:15,662 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:15,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:15,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2128696812, now seen corresponding path program 1 times [2019-11-07 01:36:15,668 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:15,668 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82946925] [2019-11-07 01:36:15,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:15,788 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82946925] [2019-11-07 01:36:15,789 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:36:15,789 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:36:15,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792700880] [2019-11-07 01:36:15,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:36:15,790 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:36:15,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:36:15,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:15,791 INFO L87 Difference]: Start difference. First operand 315 states and 544 transitions. Second operand 3 states. [2019-11-07 01:36:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:36:16,173 INFO L93 Difference]: Finished difference Result 852 states and 1501 transitions. [2019-11-07 01:36:16,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:36:16,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 88 [2019-11-07 01:36:16,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:36:16,181 INFO L225 Difference]: With dead ends: 852 [2019-11-07 01:36:16,181 INFO L226 Difference]: Without dead ends: 542 [2019-11-07 01:36:16,183 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:36:16,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2019-11-07 01:36:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 540. [2019-11-07 01:36:16,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2019-11-07 01:36:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 858 transitions. [2019-11-07 01:36:16,215 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 858 transitions. Word has length 88 [2019-11-07 01:36:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:36:16,216 INFO L462 AbstractCegarLoop]: Abstraction has 540 states and 858 transitions. [2019-11-07 01:36:16,216 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:36:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 858 transitions. [2019-11-07 01:36:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-07 01:36:16,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:36:16,219 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:36:16,220 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:36:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:36:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1060648089, now seen corresponding path program 1 times [2019-11-07 01:36:16,220 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:36:16,221 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578457907] [2019-11-07 01:36:16,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:36:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:16,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578457907] [2019-11-07 01:36:16,310 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61004186] [2019-11-07 01:36:16,310 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:36:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:36:16,422 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-07 01:36:16,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:36:16,489 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:16,490 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:36:16,654 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:36:16,654 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1771207419] [2019-11-07 01:36:16,715 INFO L159 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-11-07 01:36:16,716 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:36:16,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:36:16,735 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:36:16,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:36:16,952 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 98 for LOIs [2019-11-07 01:36:18,415 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 141 for LOIs [2019-11-07 01:36:18,644 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:36:18,769 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:36:18,995 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 143 [2019-11-07 01:36:19,116 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 143 [2019-11-07 01:36:19,399 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:19,615 WARN L191 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:19,803 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:19,955 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2019-11-07 01:36:20,193 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:20,321 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:20,701 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:36:20,875 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:21,049 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-11-07 01:36:21,389 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:21,713 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:36:21,952 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-11-07 01:36:22,083 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2019-11-07 01:36:22,345 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:36:22,642 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:36:23,113 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 148 [2019-11-07 01:36:23,353 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 148 [2019-11-07 01:36:24,230 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-11-07 01:36:24,742 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2019-11-07 01:36:25,336 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-11-07 01:36:25,777 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 147 [2019-11-07 01:36:26,309 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 147 [2019-11-07 01:36:26,573 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 147 [2019-11-07 01:36:32,529 WARN L191 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-07 01:36:32,670 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2019-11-07 01:36:32,776 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-11-07 01:36:33,001 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 127 [2019-11-07 01:36:33,706 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 14 [2019-11-07 01:36:34,469 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 207120 conjuctions. This might take some time...