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/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:29,670 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:29,673 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:29,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:54:29,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:54:29,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:54:29,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:54:29,707 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:54:29,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:54:29,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:54:29,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:54:29,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:54:29,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:29,713 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:29,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:29,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:29,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:29,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:29,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:29,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:29,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:29,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:29,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:29,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:29,726 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:54:29,726 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:54:29,726 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:54:29,727 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:54:29,728 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:54:29,729 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:54:29,729 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:54:29,730 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:54:29,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:54:29,731 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:54:29,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:54:29,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:54:29,733 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:54:29,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:54:29,733 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:29,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:29,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:29,736 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 01:54:29,749 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:29,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:29,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:29,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:29,751 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:29,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:29,752 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:29,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:29,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:29,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:29,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:29,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:29,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:29,753 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:29,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:29,753 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:29,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:29,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:29,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:29,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:29,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:29,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:29,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:29,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:29,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:29,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:29,756 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:29,756 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:29,756 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 01:54:30,069 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:30,081 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:30,085 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:30,086 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:30,086 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:30,087 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-15 01:54:30,153 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a82e28e/74e15e673e274a8eb238983db8706e3f/FLAGd20116285 [2019-10-15 01:54:30,794 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:30,795 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-15 01:54:30,831 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a82e28e/74e15e673e274a8eb238983db8706e3f/FLAGd20116285 [2019-10-15 01:54:30,969 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9a82e28e/74e15e673e274a8eb238983db8706e3f [2019-10-15 01:54:30,979 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:30,982 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:30,985 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:30,986 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:30,989 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:30,990 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:30" (1/1) ... [2019-10-15 01:54:30,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e6a8581 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:30, skipping insertion in model container [2019-10-15 01:54:30,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:30" (1/1) ... [2019-10-15 01:54:31,001 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:31,086 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:31,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:31,984 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:32,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:32,383 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:32,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32 WrapperNode [2019-10-15 01:54:32,385 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:32,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:32,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:32,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:32,400 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,530 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,568 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (1/1) ... [2019-10-15 01:54:32,603 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:32,603 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:32,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:32,604 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:32,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (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 01:54:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:32,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:32,699 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:32,699 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:32,700 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:32,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:54:40,531 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:54:40,532 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:54:40,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:40 BoogieIcfgContainer [2019-10-15 01:54:40,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:54:40,535 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:54:40,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:54:40,538 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:54:40,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:30" (1/3) ... [2019-10-15 01:54:40,540 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f41fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:40, skipping insertion in model container [2019-10-15 01:54:40,540 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:32" (2/3) ... [2019-10-15 01:54:40,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63f41fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:54:40, skipping insertion in model container [2019-10-15 01:54:40,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:54:40" (3/3) ... [2019-10-15 01:54:40,543 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-10-15 01:54:40,553 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:54:40,562 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:54:40,575 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:54:40,609 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:54:40,610 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:54:40,610 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:54:40,610 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:54:40,610 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:54:40,611 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:54:40,611 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:54:40,611 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:54:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:54:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:54:40,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:40,645 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:40,647 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash 648043117, now seen corresponding path program 1 times [2019-10-15 01:54:40,659 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:40,659 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046129704] [2019-10-15 01:54:40,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:40,660 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:40,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:40,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:40,943 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 01:54:40,943 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046129704] [2019-10-15 01:54:40,944 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:40,945 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:40,945 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485236511] [2019-10-15 01:54:40,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:40,952 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:40,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:40,970 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:54:45,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:45,987 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:54:45,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:45,988 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:54:45,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:46,022 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:54:46,022 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:54:46,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:54:46,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 691. [2019-10-15 01:54:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-15 01:54:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 1133 transitions. [2019-10-15 01:54:46,159 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 1133 transitions. Word has length 11 [2019-10-15 01:54:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:46,159 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 1133 transitions. [2019-10-15 01:54:46,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 1133 transitions. [2019-10-15 01:54:46,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:54:46,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:46,162 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:54:46,162 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:46,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:46,163 INFO L82 PathProgramCache]: Analyzing trace with hash 836538840, now seen corresponding path program 1 times [2019-10-15 01:54:46,163 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:46,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056913778] [2019-10-15 01:54:46,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:46,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:46,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:46,259 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 01:54:46,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056913778] [2019-10-15 01:54:46,259 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:54:46,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:54:46,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399152715] [2019-10-15 01:54:46,261 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:54:46,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:54:46,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:54:46,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:46,262 INFO L87 Difference]: Start difference. First operand 691 states and 1133 transitions. Second operand 4 states. [2019-10-15 01:54:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:54:52,965 INFO L93 Difference]: Finished difference Result 2745 states and 4570 transitions. [2019-10-15 01:54:52,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:54:52,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:54:52,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:54:52,979 INFO L225 Difference]: With dead ends: 2745 [2019-10-15 01:54:52,979 INFO L226 Difference]: Without dead ends: 2059 [2019-10-15 01:54:52,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:54:52,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2019-10-15 01:54:53,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 2057. [2019-10-15 01:54:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2057 states. [2019-10-15 01:54:53,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 3023 transitions. [2019-10-15 01:54:53,046 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 3023 transitions. Word has length 21 [2019-10-15 01:54:53,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:54:53,046 INFO L462 AbstractCegarLoop]: Abstraction has 2057 states and 3023 transitions. [2019-10-15 01:54:53,046 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:54:53,046 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 3023 transitions. [2019-10-15 01:54:53,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:54:53,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:54:53,051 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 01:54:53,051 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:54:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:54:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash 585847024, now seen corresponding path program 1 times [2019-10-15 01:54:53,052 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:54:53,052 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236496825] [2019-10-15 01:54:53,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:53,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:54:53,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:54:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-10-15 01:54:53,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236496825] [2019-10-15 01:54:53,253 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269295309] [2019-10-15 01:54:53,254 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 01:54:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:54:53,372 INFO L256 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:54:53,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:54:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:54:53,487 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:54:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:54:53,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [468062233] [2019-10-15 01:54:53,691 INFO L162 IcfgInterpreter]: Started Sifa with 43 locations of interest [2019-10-15 01:54:53,691 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:54:53,697 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:54:53,705 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:54:53,706 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:54:53,965 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 58 for LOIs [2019-10-15 01:54:54,132 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:54:54,167 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:54:54,211 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:54:54,871 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6022 conjuctions. This might take some time... [2019-10-15 01:54:55,021 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:54:55,336 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6022 conjuctions. This might take some time... [2019-10-15 01:54:56,106 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:54:56,147 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:54:56,185 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6456 conjuctions. This might take some time... [2019-10-15 01:54:57,368 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:54:57,409 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6456 conjuctions. This might take some time... [2019-10-15 01:54:58,454 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:54:58,512 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6456 conjuctions. This might take some time... [2019-10-15 01:54:59,814 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 57 [2019-10-15 01:54:59,855 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2019-10-15 01:54:59,896 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6456 conjuctions. This might take some time... [2019-10-15 01:55:00,995 WARN L191 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 410 DAG size of output: 57 [2019-10-15 01:55:01,088 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:55:03,626 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 36252 conjuctions. This might take some time... [2019-10-15 01:55:05,618 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52