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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:54:59,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:54:59,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:54:59,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 01:54:59,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:54:59,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:54:59,838 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:54:59,839 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:54:59,840 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:54:59,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:54:59,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:54:59,844 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:54:59,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:54:59,847 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:54:59,848 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:54:59,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:54:59,851 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:54:59,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:54:59,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:54:59,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:54:59,861 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 01:54:59,877 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:54:59,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:54:59,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:54:59,879 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:54:59,879 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:54:59,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:54:59,879 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:54:59,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:54:59,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:54:59,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:54:59,880 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:54:59,880 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:54:59,880 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:54:59,881 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:54:59,881 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:54:59,881 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:54:59,881 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:54:59,881 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:54:59,881 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:54:59,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:54:59,882 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:54:59,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:54:59,882 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:54:59,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:54:59,883 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:54:59,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:54:59,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:54:59,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:54:59,883 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 01:55:00,183 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:00,206 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:00,210 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:00,212 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:00,212 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:00,213 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-15 01:55:00,316 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3d9c695/766d4d5d35734077ad805002598c7f77/FLAG5e0ee31fe [2019-10-15 01:55:01,070 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:01,072 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-15 01:55:01,098 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3d9c695/766d4d5d35734077ad805002598c7f77/FLAG5e0ee31fe [2019-10-15 01:55:01,199 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c3d9c695/766d4d5d35734077ad805002598c7f77 [2019-10-15 01:55:01,211 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:01,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:01,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:01,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:01,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:01,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:01" (1/1) ... [2019-10-15 01:55:01,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6650a629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:01, skipping insertion in model container [2019-10-15 01:55:01,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:01" (1/1) ... [2019-10-15 01:55:01,231 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:01,318 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:02,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:02,263 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:02,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:02,574 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:02,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02 WrapperNode [2019-10-15 01:55:02,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:02,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:02,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:02,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:02,596 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,597 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,797 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (1/1) ... [2019-10-15 01:55:02,819 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:02,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:02,820 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:02,820 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:02,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (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 01:55:02,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:02,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:02,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:02,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:02,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:12,923 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:12,924 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:12,925 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:12 BoogieIcfgContainer [2019-10-15 01:55:12,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:12,927 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:12,927 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:12,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:12,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:01" (1/3) ... [2019-10-15 01:55:12,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cce4c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:12, skipping insertion in model container [2019-10-15 01:55:12,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:02" (2/3) ... [2019-10-15 01:55:12,932 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cce4c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:12, skipping insertion in model container [2019-10-15 01:55:12,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:12" (3/3) ... [2019-10-15 01:55:12,937 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label43.c [2019-10-15 01:55:12,948 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:12,961 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:12,976 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:13,020 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:13,020 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:13,021 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:13,021 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:13,021 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:13,021 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:13,021 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:13,021 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:13,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:13,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:13,065 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:13,066 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:13,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:13,071 INFO L82 PathProgramCache]: Analyzing trace with hash 648054125, now seen corresponding path program 1 times [2019-10-15 01:55:13,078 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:13,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668949153] [2019-10-15 01:55:13,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:13,079 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:13,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:13,359 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 01:55:13,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668949153] [2019-10-15 01:55:13,361 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:13,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:13,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963946593] [2019-10-15 01:55:13,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:13,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:13,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:13,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:13,386 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-15 01:55:16,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:16,860 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-15 01:55:16,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:16,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-15 01:55:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:16,900 INFO L225 Difference]: With dead ends: 953 [2019-10-15 01:55:16,901 INFO L226 Difference]: Without dead ends: 702 [2019-10-15 01:55:16,918 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 01:55:16,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-15 01:55:17,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 430. [2019-10-15 01:55:17,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2019-10-15 01:55:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 821 transitions. [2019-10-15 01:55:17,073 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 821 transitions. Word has length 11 [2019-10-15 01:55:17,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:17,075 INFO L462 AbstractCegarLoop]: Abstraction has 430 states and 821 transitions. [2019-10-15 01:55:17,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 821 transitions. [2019-10-15 01:55:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:55:17,078 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:17,079 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 01:55:17,079 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -907748291, now seen corresponding path program 1 times [2019-10-15 01:55:17,081 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:17,081 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868406872] [2019-10-15 01:55:17,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:17,081 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:17,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:17,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:17,219 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 01:55:17,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868406872] [2019-10-15 01:55:17,219 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:17,220 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 01:55:17,220 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592077047] [2019-10-15 01:55:17,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:55:17,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:17,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:55:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:55:17,228 INFO L87 Difference]: Start difference. First operand 430 states and 821 transitions. Second operand 4 states. [2019-10-15 01:55:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:20,764 INFO L93 Difference]: Finished difference Result 1699 states and 3298 transitions. [2019-10-15 01:55:20,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:55:20,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-15 01:55:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:20,773 INFO L225 Difference]: With dead ends: 1699 [2019-10-15 01:55:20,773 INFO L226 Difference]: Without dead ends: 1274 [2019-10-15 01:55:20,775 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 01:55:20,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2019-10-15 01:55:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1243. [2019-10-15 01:55:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2019-10-15 01:55:20,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2082 transitions. [2019-10-15 01:55:20,825 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2082 transitions. Word has length 21 [2019-10-15 01:55:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:20,825 INFO L462 AbstractCegarLoop]: Abstraction has 1243 states and 2082 transitions. [2019-10-15 01:55:20,825 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:55:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2082 transitions. [2019-10-15 01:55:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 01:55:20,829 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:20,830 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-15 01:55:20,830 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2004287180, now seen corresponding path program 1 times [2019-10-15 01:55:20,831 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:20,831 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69813954] [2019-10-15 01:55:20,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:20,831 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:20,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:20,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:20,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69813954] [2019-10-15 01:55:20,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593976281] [2019-10-15 01:55:20,914 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 01:55:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:21,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:55:21,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:55:21,085 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:21,173 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:21,174 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-15 01:55:21,174 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838619421] [2019-10-15 01:55:21,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:21,175 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:21,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:55:21,182 INFO L87 Difference]: Start difference. First operand 1243 states and 2082 transitions. Second operand 5 states. [2019-10-15 01:55:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:28,817 INFO L93 Difference]: Finished difference Result 3377 states and 5740 transitions. [2019-10-15 01:55:28,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:28,819 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2019-10-15 01:55:28,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:28,842 INFO L225 Difference]: With dead ends: 3377 [2019-10-15 01:55:28,842 INFO L226 Difference]: Without dead ends: 2139 [2019-10-15 01:55:28,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-15 01:55:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2019-10-15 01:55:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2104. [2019-10-15 01:55:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2104 states. [2019-10-15 01:55:28,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3355 transitions. [2019-10-15 01:55:28,951 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3355 transitions. Word has length 62 [2019-10-15 01:55:28,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:28,952 INFO L462 AbstractCegarLoop]: Abstraction has 2104 states and 3355 transitions. [2019-10-15 01:55:28,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:28,952 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3355 transitions. [2019-10-15 01:55:28,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 01:55:28,957 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:28,958 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:29,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:29,212 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:29,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1114103996, now seen corresponding path program 1 times [2019-10-15 01:55:29,213 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:29,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795877687] [2019-10-15 01:55:29,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:29,214 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:29,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:29,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:29,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795877687] [2019-10-15 01:55:29,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955369171] [2019-10-15 01:55:29,329 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 01:55:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:29,413 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:55:29,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:29,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:55:29,458 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:29,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:29,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-15 01:55:29,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389398182] [2019-10-15 01:55:29,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:29,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:29,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:29,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:55:29,539 INFO L87 Difference]: Start difference. First operand 2104 states and 3355 transitions. Second operand 5 states. [2019-10-15 01:55:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:32,656 INFO L93 Difference]: Finished difference Result 6206 states and 10355 transitions. [2019-10-15 01:55:32,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:32,656 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-10-15 01:55:32,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:32,680 INFO L225 Difference]: With dead ends: 6206 [2019-10-15 01:55:32,680 INFO L226 Difference]: Without dead ends: 4107 [2019-10-15 01:55:32,687 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:55:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2019-10-15 01:55:32,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 2747. [2019-10-15 01:55:32,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2747 states. [2019-10-15 01:55:32,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4221 transitions. [2019-10-15 01:55:32,785 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4221 transitions. Word has length 66 [2019-10-15 01:55:32,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:32,786 INFO L462 AbstractCegarLoop]: Abstraction has 2747 states and 4221 transitions. [2019-10-15 01:55:32,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:32,786 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4221 transitions. [2019-10-15 01:55:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:55:32,790 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:32,791 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:55:32,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:32,995 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:32,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:32,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1349289601, now seen corresponding path program 1 times [2019-10-15 01:55:32,996 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:32,996 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293042358] [2019-10-15 01:55:32,997 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:32,997 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:32,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:33,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293042358] [2019-10-15 01:55:33,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27687457] [2019-10-15 01:55:33,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:33,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:33,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:55:33,363 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:33,416 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:33,417 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:33,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811264824] [2019-10-15 01:55:33,595 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-15 01:55:33,596 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:55:33,603 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:55:33,612 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:55:33,613 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:55:33,823 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 58 for LOIs [2019-10-15 01:55:34,108 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:55:34,516 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6672 conjuctions. This might take some time... [2019-10-15 01:55:34,675 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 52 [2019-10-15 01:55:34,935 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 6672 conjuctions. This might take some time... [2019-10-15 01:55:35,003 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:55:35,016 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 9 [2019-10-15 01:55:36,326 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 80 for LOIs [2019-10-15 01:55:36,458 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2019-10-15 01:55:36,460 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 54