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_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:50,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:50,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:50,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:50,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:50,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:50,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:50,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:50,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:50,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:50,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:50,808 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:50,809 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:50,810 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:50,811 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:50,812 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:50,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:50,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:50,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:50,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:50,824 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 01:54:50,837 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:50,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:50,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:50,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:50,839 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:50,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:50,840 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:50,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:50,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:50,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:50,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:50,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:50,841 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:50,841 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:50,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:50,841 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:50,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:50,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:50,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:50,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:50,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:50,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:50,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:50,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:50,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:50,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:50,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:50,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:50,844 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 01:54:51,134 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:54:51,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:54:51,151 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:54:51,152 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:54:51,152 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:54:51,153 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-15 01:54:51,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb85776a/ae52aae8d7ca44afafc8e3279548caa4/FLAGcfaa28e9c [2019-10-15 01:54:51,919 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:54:51,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-15 01:54:51,942 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb85776a/ae52aae8d7ca44afafc8e3279548caa4/FLAGcfaa28e9c [2019-10-15 01:54:52,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bb85776a/ae52aae8d7ca44afafc8e3279548caa4 [2019-10-15 01:54:52,101 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:54:52,103 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:54:52,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:52,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:54:52,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:54:52,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:52" (1/1) ... [2019-10-15 01:54:52,113 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3a515f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:52, skipping insertion in model container [2019-10-15 01:54:52,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:54:52" (1/1) ... [2019-10-15 01:54:52,122 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:54:52,219 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:54:53,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:53,121 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:54:53,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:54:53,492 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:54:53,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53 WrapperNode [2019-10-15 01:54:53,494 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:54:53,495 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:54:53,495 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:54:53,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:54:53,514 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (1/1) ... [2019-10-15 01:54:53,725 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:54:53,726 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:54:53,726 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:54:53,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:54:53,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (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 01:54:53,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:54:53,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:54:53,795 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:54:53,795 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:54:53,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:54:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:54:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:54:53,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:54:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:54:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:54:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:54:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:54:53,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:05,159 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:05,160 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:05,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:05 BoogieIcfgContainer [2019-10-15 01:55:05,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:05,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:05,163 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:05,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:05,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:54:52" (1/3) ... [2019-10-15 01:55:05,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269c43f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:05, skipping insertion in model container [2019-10-15 01:55:05,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:54:53" (2/3) ... [2019-10-15 01:55:05,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269c43f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:05, skipping insertion in model container [2019-10-15 01:55:05,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:05" (3/3) ... [2019-10-15 01:55:05,170 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2019-10-15 01:55:05,179 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:05,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:05,199 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:05,227 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:05,227 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:05,227 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:05,227 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:05,228 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:05,228 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:05,228 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:05,228 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:05,254 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:05,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:05,260 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:05,261 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:05,263 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:05,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash 648051053, now seen corresponding path program 1 times [2019-10-15 01:55:05,275 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:05,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827076709] [2019-10-15 01:55:05,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:05,276 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:05,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:05,506 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 01:55:05,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827076709] [2019-10-15 01:55:05,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:05,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:05,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900215956] [2019-10-15 01:55:05,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:05,515 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:05,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:05,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:05,533 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:55:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:13,425 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:55:13,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:13,426 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:55:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:13,450 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:55:13,451 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:55:13,460 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 01:55:13,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:55:13,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 679. [2019-10-15 01:55:13,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 679 states. [2019-10-15 01:55:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 1210 transitions. [2019-10-15 01:55:13,565 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 1210 transitions. Word has length 11 [2019-10-15 01:55:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:13,565 INFO L462 AbstractCegarLoop]: Abstraction has 679 states and 1210 transitions. [2019-10-15 01:55:13,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 1210 transitions. [2019-10-15 01:55:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 01:55:13,568 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:13,568 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] [2019-10-15 01:55:13,568 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:13,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1542711732, now seen corresponding path program 1 times [2019-10-15 01:55:13,569 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:13,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762192629] [2019-10-15 01:55:13,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:13,570 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:13,570 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:13,684 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 01:55:13,684 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762192629] [2019-10-15 01:55:13,684 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:13,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:55:13,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295740965] [2019-10-15 01:55:13,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:13,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:55:13,688 INFO L87 Difference]: Start difference. First operand 679 states and 1210 transitions. Second operand 5 states. [2019-10-15 01:55:18,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:18,069 INFO L93 Difference]: Finished difference Result 2059 states and 3710 transitions. [2019-10-15 01:55:18,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:18,069 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-10-15 01:55:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:18,082 INFO L225 Difference]: With dead ends: 2059 [2019-10-15 01:55:18,082 INFO L226 Difference]: Without dead ends: 1385 [2019-10-15 01:55:18,087 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2019-10-15 01:55:18,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1340. [2019-10-15 01:55:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1340 states. [2019-10-15 01:55:18,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 2018 transitions. [2019-10-15 01:55:18,168 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 2018 transitions. Word has length 24 [2019-10-15 01:55:18,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:18,168 INFO L462 AbstractCegarLoop]: Abstraction has 1340 states and 2018 transitions. [2019-10-15 01:55:18,168 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:18,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 2018 transitions. [2019-10-15 01:55:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:55:18,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:18,170 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] [2019-10-15 01:55:18,170 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:18,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1104058204, now seen corresponding path program 1 times [2019-10-15 01:55:18,171 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:18,171 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040501138] [2019-10-15 01:55:18,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:18,172 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:18,172 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:18,276 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 01:55:18,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040501138] [2019-10-15 01:55:18,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:18,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:18,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970240643] [2019-10-15 01:55:18,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:18,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:18,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:18,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:18,278 INFO L87 Difference]: Start difference. First operand 1340 states and 2018 transitions. Second operand 4 states. [2019-10-15 01:55:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:22,700 INFO L93 Difference]: Finished difference Result 5323 states and 8248 transitions. [2019-10-15 01:55:22,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:22,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-10-15 01:55:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:22,723 INFO L225 Difference]: With dead ends: 5323 [2019-10-15 01:55:22,732 INFO L226 Difference]: Without dead ends: 3988 [2019-10-15 01:55:22,738 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 01:55:22,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3988 states. [2019-10-15 01:55:22,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3988 to 3416. [2019-10-15 01:55:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3416 states. [2019-10-15 01:55:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4929 transitions. [2019-10-15 01:55:22,870 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4929 transitions. Word has length 32 [2019-10-15 01:55:22,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:22,871 INFO L462 AbstractCegarLoop]: Abstraction has 3416 states and 4929 transitions. [2019-10-15 01:55:22,871 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4929 transitions. [2019-10-15 01:55:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:55:22,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:22,884 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:22,884 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash 464928053, now seen corresponding path program 1 times [2019-10-15 01:55:22,885 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:22,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657327123] [2019-10-15 01:55:22,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:22,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:22,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:23,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657327123] [2019-10-15 01:55:23,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850989530] [2019-10-15 01:55:23,223 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 01:55:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:23,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 01:55:23,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:23,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 01:55:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:55:23,515 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:23,660 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:23,662 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:23,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:23,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:23,708 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:23,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:23,867 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:23,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11, 5] total 16 [2019-10-15 01:55:23,867 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913019400] [2019-10-15 01:55:23,869 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:23,869 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:23,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:23,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-10-15 01:55:23,871 INFO L87 Difference]: Start difference. First operand 3416 states and 4929 transitions. Second operand 5 states. [2019-10-15 01:55:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:27,940 INFO L93 Difference]: Finished difference Result 7337 states and 10566 transitions. [2019-10-15 01:55:27,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:27,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2019-10-15 01:55:27,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:27,966 INFO L225 Difference]: With dead ends: 7337 [2019-10-15 01:55:27,966 INFO L226 Difference]: Without dead ends: 3926 [2019-10-15 01:55:27,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:55:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2019-10-15 01:55:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3691. [2019-10-15 01:55:28,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3691 states. [2019-10-15 01:55:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3691 states to 3691 states and 5268 transitions. [2019-10-15 01:55:28,102 INFO L78 Accepts]: Start accepts. Automaton has 3691 states and 5268 transitions. Word has length 56 [2019-10-15 01:55:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:28,103 INFO L462 AbstractCegarLoop]: Abstraction has 3691 states and 5268 transitions. [2019-10-15 01:55:28,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 3691 states and 5268 transitions. [2019-10-15 01:55:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 01:55:28,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:28,107 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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] [2019-10-15 01:55:28,313 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:28,313 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:28,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1113665287, now seen corresponding path program 1 times [2019-10-15 01:55:28,314 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:28,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909326776] [2019-10-15 01:55:28,314 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:28,315 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:28,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:55:28,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909326776] [2019-10-15 01:55:28,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632796209] [2019-10-15 01:55:28,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:29,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:55:29,028 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:29,114 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:55:29,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:55:29,173 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 01:55:29,173 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:29,247 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 01:55:29,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 01:55:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 49 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-15 01:55:29,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428005089] [2019-10-15 01:55:29,451 INFO L162 IcfgInterpreter]: Started Sifa with 43 locations of interest [2019-10-15 01:55:29,452 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:29,458 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:29,466 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:29,467 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:29,657 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 56 for LOIs [2019-10-15 01:55:29,791 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-10-15 01:55:30,197 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6443 conjuctions. This might take some time... [2019-10-15 01:55:30,282 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 40 [2019-10-15 01:55:30,416 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6443 conjuctions. This might take some time... [2019-10-15 01:55:30,483 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:55:30,540 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6785 conjuctions. This might take some time... [2019-10-15 01:55:30,680 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 21 [2019-10-15 01:55:30,786 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6785 conjuctions. This might take some time...