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/Problem16_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:56:33,748 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:56:33,752 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:56:33,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:56:33,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:56:33,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:56:33,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:56:33,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:56:33,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:56:33,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:56:33,786 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:56:33,788 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:56:33,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:56:33,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:56:33,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:56:33,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:56:33,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:56:33,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:56:33,813 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:56:33,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:56:33,815 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 01:56:33,829 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:56:33,830 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:56:33,831 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:56:33,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:56:33,831 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:56:33,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:56:33,832 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:56:33,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:56:33,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:56:33,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:56:33,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:56:33,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:56:33,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:56:33,833 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:56:33,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:56:33,834 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:56:33,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:56:33,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:56:33,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:56:33,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:56:33,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:56:33,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:56:33,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:56:33,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:56:33,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:56:33,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:56:33,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:56:33,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:56:33,836 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 01:56:34,132 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:56:34,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:56:34,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:56:34,151 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:56:34,151 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:56:34,152 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-15 01:56:34,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c441c5c75/7cdb08b0840c47b8841e9b4cbe74bdf6/FLAGdcbf069d6 [2019-10-15 01:56:34,835 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:56:34,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label48.c [2019-10-15 01:56:34,861 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c441c5c75/7cdb08b0840c47b8841e9b4cbe74bdf6/FLAGdcbf069d6 [2019-10-15 01:56:35,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c441c5c75/7cdb08b0840c47b8841e9b4cbe74bdf6 [2019-10-15 01:56:35,024 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:56:35,026 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:56:35,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:35,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:56:35,031 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:56:35,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:35" (1/1) ... [2019-10-15 01:56:35,036 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af4a2cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:35, skipping insertion in model container [2019-10-15 01:56:35,036 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:56:35" (1/1) ... [2019-10-15 01:56:35,044 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:56:35,127 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:56:35,958 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:35,963 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:56:36,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:56:36,219 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:56:36,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36 WrapperNode [2019-10-15 01:56:36,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:56:36,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:56:36,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:56:36,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:56:36,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (1/1) ... [2019-10-15 01:56:36,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:56:36,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:56:36,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:56:36,409 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:56:36,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (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 01:56:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:56:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:56:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:56:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:56:36,479 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:56:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:56:36,481 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:56:36,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:56:36,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:56:36,482 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:56:36,482 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:56:36,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:56:36,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:56:59,187 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:56:59,187 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:56:59,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:59 BoogieIcfgContainer [2019-10-15 01:56:59,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:56:59,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:56:59,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:56:59,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:56:59,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:56:35" (1/3) ... [2019-10-15 01:56:59,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75068ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:59, skipping insertion in model container [2019-10-15 01:56:59,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:56:36" (2/3) ... [2019-10-15 01:56:59,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75068ffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:56:59, skipping insertion in model container [2019-10-15 01:56:59,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:56:59" (3/3) ... [2019-10-15 01:56:59,202 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label48.c [2019-10-15 01:56:59,215 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:56:59,226 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:56:59,240 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:56:59,273 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:56:59,273 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:56:59,273 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:56:59,273 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:56:59,274 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:56:59,274 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:56:59,274 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:56:59,274 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:56:59,306 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:56:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:56:59,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:56:59,315 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:56:59,317 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:56:59,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:56:59,324 INFO L82 PathProgramCache]: Analyzing trace with hash 863569215, now seen corresponding path program 1 times [2019-10-15 01:56:59,333 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:56:59,334 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566458841] [2019-10-15 01:56:59,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,334 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:56:59,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:56:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:56:59,630 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 01:56:59,631 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566458841] [2019-10-15 01:56:59,632 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:56:59,632 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:56:59,632 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135188001] [2019-10-15 01:56:59,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:56:59,638 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:56:59,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:56:59,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:56:59,658 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:57:01,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:01,566 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:57:01,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:57:01,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:57:01,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:01,589 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:57:01,589 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:57:01,597 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:57:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:57:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 461. [2019-10-15 01:57:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 461 states. [2019-10-15 01:57:01,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 873 transitions. [2019-10-15 01:57:01,690 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 873 transitions. Word has length 11 [2019-10-15 01:57:01,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:01,691 INFO L462 AbstractCegarLoop]: Abstraction has 461 states and 873 transitions. [2019-10-15 01:57:01,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:57:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 873 transitions. [2019-10-15 01:57:01,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-15 01:57:01,693 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:01,694 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:01,694 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:01,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:01,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1645968157, now seen corresponding path program 1 times [2019-10-15 01:57:01,695 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:01,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721692653] [2019-10-15 01:57:01,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:01,695 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:01,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:01,810 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 01:57:01,811 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721692653] [2019-10-15 01:57:01,811 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:01,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 01:57:01,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245033300] [2019-10-15 01:57:01,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:57:01,813 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:01,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:57:01,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:57:01,814 INFO L87 Difference]: Start difference. First operand 461 states and 873 transitions. Second operand 5 states. [2019-10-15 01:57:03,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:03,986 INFO L93 Difference]: Finished difference Result 1387 states and 2652 transitions. [2019-10-15 01:57:03,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:03,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-10-15 01:57:03,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:03,999 INFO L225 Difference]: With dead ends: 1387 [2019-10-15 01:57:03,999 INFO L226 Difference]: Without dead ends: 931 [2019-10-15 01:57:04,002 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 01:57:04,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2019-10-15 01:57:04,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 923. [2019-10-15 01:57:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 923 states. [2019-10-15 01:57:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1537 transitions. [2019-10-15 01:57:04,061 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1537 transitions. Word has length 23 [2019-10-15 01:57:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:04,062 INFO L462 AbstractCegarLoop]: Abstraction has 923 states and 1537 transitions. [2019-10-15 01:57:04,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:57:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1537 transitions. [2019-10-15 01:57:04,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-15 01:57:04,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:04,064 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:04,064 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1633645332, now seen corresponding path program 1 times [2019-10-15 01:57:04,065 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:04,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276094991] [2019-10-15 01:57:04,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:04,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:04,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 01:57:04,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276094991] [2019-10-15 01:57:04,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422813025] [2019-10-15 01:57:04,219 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 01:57:04,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:04,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:04,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:04,374 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 01:57:04,375 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:04,425 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 01:57:04,426 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:57:04,426 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-15 01:57:04,426 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919788943] [2019-10-15 01:57:04,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:57:04,427 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:57:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:57:04,428 INFO L87 Difference]: Start difference. First operand 923 states and 1537 transitions. Second operand 3 states. [2019-10-15 01:57:05,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:05,635 INFO L93 Difference]: Finished difference Result 1381 states and 2201 transitions. [2019-10-15 01:57:05,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:57:05,644 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-15 01:57:05,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:05,653 INFO L225 Difference]: With dead ends: 1381 [2019-10-15 01:57:05,653 INFO L226 Difference]: Without dead ends: 1379 [2019-10-15 01:57:05,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:57:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2019-10-15 01:57:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 933. [2019-10-15 01:57:05,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2019-10-15 01:57:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1554 transitions. [2019-10-15 01:57:05,697 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1554 transitions. Word has length 52 [2019-10-15 01:57:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:05,698 INFO L462 AbstractCegarLoop]: Abstraction has 933 states and 1554 transitions. [2019-10-15 01:57:05,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:57:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1554 transitions. [2019-10-15 01:57:05,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-15 01:57:05,700 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:05,701 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:57:05,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:57:05,911 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:05,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:05,912 INFO L82 PathProgramCache]: Analyzing trace with hash -623852981, now seen corresponding path program 1 times [2019-10-15 01:57:05,913 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:05,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055515828] [2019-10-15 01:57:05,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:05,913 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:05,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:06,127 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 01:57:06,127 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055515828] [2019-10-15 01:57:06,128 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:57:06,128 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:57:06,129 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524835732] [2019-10-15 01:57:06,129 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:57:06,129 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:57:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:57:06,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:57:06,130 INFO L87 Difference]: Start difference. First operand 933 states and 1554 transitions. Second operand 6 states. [2019-10-15 01:57:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:57:08,496 INFO L93 Difference]: Finished difference Result 2572 states and 4312 transitions. [2019-10-15 01:57:08,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:57:08,497 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2019-10-15 01:57:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:57:08,511 INFO L225 Difference]: With dead ends: 2572 [2019-10-15 01:57:08,511 INFO L226 Difference]: Without dead ends: 1644 [2019-10-15 01:57:08,516 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:57:08,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2019-10-15 01:57:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1608. [2019-10-15 01:57:08,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1608 states. [2019-10-15 01:57:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2455 transitions. [2019-10-15 01:57:08,589 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2455 transitions. Word has length 67 [2019-10-15 01:57:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:57:08,591 INFO L462 AbstractCegarLoop]: Abstraction has 1608 states and 2455 transitions. [2019-10-15 01:57:08,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:57:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2455 transitions. [2019-10-15 01:57:08,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 01:57:08,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:57:08,605 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:57:08,605 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:57:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:57:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1197635685, now seen corresponding path program 1 times [2019-10-15 01:57:08,606 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:57:08,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714926898] [2019-10-15 01:57:08,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:08,606 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:57:08,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:57:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:08,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714926898] [2019-10-15 01:57:08,867 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699488779] [2019-10-15 01:57:08,867 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 01:57:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:57:08,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:57:08,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:57:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:09,064 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:57:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 64 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:57:09,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [285844338] [2019-10-15 01:57:09,234 INFO L162 IcfgInterpreter]: Started Sifa with 77 locations of interest [2019-10-15 01:57:09,234 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:57:09,243 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:57:09,256 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:57:09,258 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:57:09,463 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 57 for LOIs [2019-10-15 01:57:09,616 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2019-10-15 01:57:10,149 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 58 [2019-10-15 01:57:11,673 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 77 for LOIs [2019-10-15 01:57:11,792 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 60