java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:51:12,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:51:12,593 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:51:12,611 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:51:12,635 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:51:12,636 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:51:12,638 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:51:12,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:51:12,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:51:12,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:51:12,642 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:51:12,644 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:51:12,645 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:51:12,646 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:51:12,647 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:51:12,648 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:51:12,650 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:51:12,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:51:12,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:51:12,659 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:51:12,660 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 01:51:12,690 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:51:12,691 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:51:12,695 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:51:12,695 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:51:12,696 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:51:12,696 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:51:12,696 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:51:12,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:51:12,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:51:12,700 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:51:12,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:51:12,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:51:12,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:51:12,700 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:51:12,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:51:12,701 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:51:12,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:51:12,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:51:12,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:51:12,702 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:51:12,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:51:12,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:12,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:51:12,702 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:51:12,703 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:51:12,703 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:51:12,703 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:51:12,703 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:51:12,703 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 01:51:12,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:51:12,996 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:51:12,999 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:51:13,001 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:51:13,001 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:51:13,002 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label24.c [2019-10-15 01:51:13,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/379eb27dd/e55b255d267b4d3db84dad74452a1ab1/FLAG72ca32943 [2019-10-15 01:51:13,880 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:51:13,881 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label24.c [2019-10-15 01:51:13,922 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/379eb27dd/e55b255d267b4d3db84dad74452a1ab1/FLAG72ca32943 [2019-10-15 01:51:13,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/379eb27dd/e55b255d267b4d3db84dad74452a1ab1 [2019-10-15 01:51:13,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:51:13,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:51:13,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:13,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:51:13,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:51:13,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:13,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b073ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:13, skipping insertion in model container [2019-10-15 01:51:13,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:51:13" (1/1) ... [2019-10-15 01:51:14,002 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:51:14,146 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:51:15,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:15,653 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:51:16,265 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:51:16,296 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:51:16,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16 WrapperNode [2019-10-15 01:51:16,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:51:16,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:51:16,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:51:16,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:51:16,312 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,363 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,498 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... [2019-10-15 01:51:16,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:51:16,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:51:16,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:51:16,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:51:16,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:51:16,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:51:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:51:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:51:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:51:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 01:51:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 01:51:16,643 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:51:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:51:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:51:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 01:51:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 01:51:16,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:51:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:51:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:51:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:51:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:51:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:51:23,354 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:51:23,354 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:51:23,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:23 BoogieIcfgContainer [2019-10-15 01:51:23,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:51:23,358 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:51:23,358 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:51:23,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:51:23,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:51:13" (1/3) ... [2019-10-15 01:51:23,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6192b0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:23, skipping insertion in model container [2019-10-15 01:51:23,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:51:16" (2/3) ... [2019-10-15 01:51:23,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6192b0ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:51:23, skipping insertion in model container [2019-10-15 01:51:23,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:51:23" (3/3) ... [2019-10-15 01:51:23,368 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label24.c [2019-10-15 01:51:23,378 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:51:23,387 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:51:23,399 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:51:23,432 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:51:23,433 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:51:23,433 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:51:23,433 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:51:23,433 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:51:23,433 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:51:23,433 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:51:23,433 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:51:23,467 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states. [2019-10-15 01:51:23,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:51:23,473 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:23,475 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:23,476 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash -874908338, now seen corresponding path program 1 times [2019-10-15 01:51:23,493 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:23,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080532299] [2019-10-15 01:51:23,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:23,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:23,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:23,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:23,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:23,727 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080532299] [2019-10-15 01:51:23,728 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:23,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:51:23,729 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866936612] [2019-10-15 01:51:23,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:51:23,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:23,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:51:23,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:51:23,762 INFO L87 Difference]: Start difference. First operand 694 states. Second operand 3 states. [2019-10-15 01:51:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:29,508 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2019-10-15 01:51:29,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:51:29,509 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:51:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:29,546 INFO L225 Difference]: With dead ends: 2068 [2019-10-15 01:51:29,547 INFO L226 Difference]: Without dead ends: 1371 [2019-10-15 01:51:29,560 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 01:51:29,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2019-10-15 01:51:29,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1357. [2019-10-15 01:51:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1357 states. [2019-10-15 01:51:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2576 transitions. [2019-10-15 01:51:29,721 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2576 transitions. Word has length 11 [2019-10-15 01:51:29,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:29,722 INFO L462 AbstractCegarLoop]: Abstraction has 1357 states and 2576 transitions. [2019-10-15 01:51:29,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:51:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2576 transitions. [2019-10-15 01:51:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:51:29,726 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:29,726 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:29,726 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:29,728 INFO L82 PathProgramCache]: Analyzing trace with hash -639780444, now seen corresponding path program 1 times [2019-10-15 01:51:29,728 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:29,728 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393218864] [2019-10-15 01:51:29,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:29,729 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:29,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:29,898 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393218864] [2019-10-15 01:51:29,899 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:29,899 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:51:29,899 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034905200] [2019-10-15 01:51:29,901 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:51:29,901 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:29,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:51:29,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:51:29,902 INFO L87 Difference]: Start difference. First operand 1357 states and 2576 transitions. Second operand 5 states. [2019-10-15 01:51:36,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:36,557 INFO L93 Difference]: Finished difference Result 4103 states and 7818 transitions. [2019-10-15 01:51:36,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:51:36,560 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-10-15 01:51:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:36,577 INFO L225 Difference]: With dead ends: 4103 [2019-10-15 01:51:36,577 INFO L226 Difference]: Without dead ends: 2751 [2019-10-15 01:51:36,582 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:51:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2751 states. [2019-10-15 01:51:36,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2751 to 2739. [2019-10-15 01:51:36,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2739 states. [2019-10-15 01:51:36,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2739 states to 2739 states and 4960 transitions. [2019-10-15 01:51:36,683 INFO L78 Accepts]: Start accepts. Automaton has 2739 states and 4960 transitions. Word has length 25 [2019-10-15 01:51:36,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:36,684 INFO L462 AbstractCegarLoop]: Abstraction has 2739 states and 4960 transitions. [2019-10-15 01:51:36,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:51:36,684 INFO L276 IsEmpty]: Start isEmpty. Operand 2739 states and 4960 transitions. [2019-10-15 01:51:36,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:51:36,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:36,685 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:36,686 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:36,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:36,686 INFO L82 PathProgramCache]: Analyzing trace with hash 815606016, now seen corresponding path program 1 times [2019-10-15 01:51:36,686 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:36,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053767889] [2019-10-15 01:51:36,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:36,687 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:36,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:36,861 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:36,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053767889] [2019-10-15 01:51:36,862 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134921740] [2019-10-15 01:51:36,862 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:51:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:36,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:51:36,943 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:51:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:37,004 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:51:37,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:37,051 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:51:37,051 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 01:51:37,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165992158] [2019-10-15 01:51:37,052 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:51:37,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:37,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:51:37,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:51:37,053 INFO L87 Difference]: Start difference. First operand 2739 states and 4960 transitions. Second operand 4 states. [2019-10-15 01:51:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:51:44,525 INFO L93 Difference]: Finished difference Result 9592 states and 17475 transitions. [2019-10-15 01:51:44,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:51:44,527 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-15 01:51:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:51:44,567 INFO L225 Difference]: With dead ends: 9592 [2019-10-15 01:51:44,568 INFO L226 Difference]: Without dead ends: 6858 [2019-10-15 01:51:44,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:51:44,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2019-10-15 01:51:44,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6844. [2019-10-15 01:51:44,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6844 states. [2019-10-15 01:51:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6844 states to 6844 states and 10881 transitions. [2019-10-15 01:51:44,818 INFO L78 Accepts]: Start accepts. Automaton has 6844 states and 10881 transitions. Word has length 27 [2019-10-15 01:51:44,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:51:44,819 INFO L462 AbstractCegarLoop]: Abstraction has 6844 states and 10881 transitions. [2019-10-15 01:51:44,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:51:44,820 INFO L276 IsEmpty]: Start isEmpty. Operand 6844 states and 10881 transitions. [2019-10-15 01:51:44,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-15 01:51:44,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:51:44,822 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:51:45,028 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:51:45,029 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:51:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:51:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash -720124140, now seen corresponding path program 1 times [2019-10-15 01:51:45,030 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:51:45,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485682048] [2019-10-15 01:51:45,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:45,030 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:51:45,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:51:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:51:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:51:45,183 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485682048] [2019-10-15 01:51:45,183 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:51:45,184 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:51:45,184 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768224847] [2019-10-15 01:51:45,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:51:45,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:51:45,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:51:45,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:51:45,186 INFO L87 Difference]: Start difference. First operand 6844 states and 10881 transitions. Second operand 6 states.