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/Problem03_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:44:10,902 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:44:10,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:44:10,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:44:10,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:44:10,955 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:44:10,957 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:44:10,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:44:10,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:44:10,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:44:10,967 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:44:10,968 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:44:10,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:44:10,970 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:44:10,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:44:10,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:44:10,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:44:10,980 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:44:10,981 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 01:44:10,996 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:44:10,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:44:10,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:44:10,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:44:10,998 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:44:10,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:44:10,998 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:44:10,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:44:10,998 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:44:10,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:44:10,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:44:10,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:44:10,999 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:44:10,999 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:44:11,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:44:11,000 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:44:11,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:44:11,000 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:44:11,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:44:11,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:44:11,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:44:11,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:44:11,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:44:11,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:44:11,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:44:11,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:44:11,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:44:11,002 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:44:11,003 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 01:44:11,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:44:11,306 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:44:11,310 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:44:11,311 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:44:11,312 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:44:11,312 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2019-10-15 01:44:11,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f792fb5/b7fee7117844427e800efe82864c1df8/FLAGf132b0642 [2019-10-15 01:44:12,017 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:44:12,018 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label56.c [2019-10-15 01:44:12,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f792fb5/b7fee7117844427e800efe82864c1df8/FLAGf132b0642 [2019-10-15 01:44:12,219 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3f792fb5/b7fee7117844427e800efe82864c1df8 [2019-10-15 01:44:12,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:44:12,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:44:12,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:44:12,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:44:12,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:44:12,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:44:12" (1/1) ... [2019-10-15 01:44:12,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:12, skipping insertion in model container [2019-10-15 01:44:12,243 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:44:12" (1/1) ... [2019-10-15 01:44:12,253 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:44:12,353 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:44:13,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:44:13,207 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:44:13,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:44:13,646 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:44:13,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13 WrapperNode [2019-10-15 01:44:13,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:44:13,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:44:13,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:44:13,649 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:44:13,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,782 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (1/1) ... [2019-10-15 01:44:13,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:44:13,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:44:13,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:44:13,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:44:13,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (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 01:44:13,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:44:13,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:44:13,889 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:44:13,890 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:44:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:44:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:44:13,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:44:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:44:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:44:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:44:13,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:44:16,967 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:44:16,967 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:44:16,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:44:16 BoogieIcfgContainer [2019-10-15 01:44:16,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:44:16,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:44:16,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:44:16,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:44:16,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:44:12" (1/3) ... [2019-10-15 01:44:16,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9cd86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:44:16, skipping insertion in model container [2019-10-15 01:44:16,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:44:13" (2/3) ... [2019-10-15 01:44:16,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9cd86a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:44:16, skipping insertion in model container [2019-10-15 01:44:16,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:44:16" (3/3) ... [2019-10-15 01:44:16,978 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label56.c [2019-10-15 01:44:16,988 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:44:16,997 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:44:17,008 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:44:17,036 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:44:17,036 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:44:17,037 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:44:17,037 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:44:17,037 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:44:17,037 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:44:17,037 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:44:17,037 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:44:17,061 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:44:17,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:44:17,075 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:17,077 INFO L380 BasicCegarLoop]: trace histogram [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, 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 01:44:17,078 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:17,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:17,085 INFO L82 PathProgramCache]: Analyzing trace with hash 268795079, now seen corresponding path program 1 times [2019-10-15 01:44:17,094 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:17,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033460885] [2019-10-15 01:44:17,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:17,095 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:17,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:17,876 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 01:44:17,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033460885] [2019-10-15 01:44:17,879 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:17,879 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:17,880 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712636458] [2019-10-15 01:44:17,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:17,886 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:17,907 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:44:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:19,082 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:44:19,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:19,084 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:44:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:19,114 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:44:19,114 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:44:19,122 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:44:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:44:19,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:44:19,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 535 transitions. [2019-10-15 01:44:19,195 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 535 transitions. Word has length 149 [2019-10-15 01:44:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:19,197 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 535 transitions. [2019-10-15 01:44:19,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 535 transitions. [2019-10-15 01:44:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:44:19,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:19,202 INFO L380 BasicCegarLoop]: trace histogram [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, 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 01:44:19,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1139431629, now seen corresponding path program 1 times [2019-10-15 01:44:19,203 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:19,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794038817] [2019-10-15 01:44:19,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:19,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:19,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:19,457 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794038817] [2019-10-15 01:44:19,457 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:19,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:19,458 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862872868] [2019-10-15 01:44:19,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:19,461 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:19,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:19,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:19,462 INFO L87 Difference]: Start difference. First operand 301 states and 535 transitions. Second operand 3 states. [2019-10-15 01:44:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:20,532 INFO L93 Difference]: Finished difference Result 891 states and 1606 transitions. [2019-10-15 01:44:20,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:20,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:44:20,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:20,540 INFO L225 Difference]: With dead ends: 891 [2019-10-15 01:44:20,540 INFO L226 Difference]: Without dead ends: 595 [2019-10-15 01:44:20,543 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:20,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-10-15 01:44:20,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-10-15 01:44:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-15 01:44:20,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 983 transitions. [2019-10-15 01:44:20,586 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 983 transitions. Word has length 161 [2019-10-15 01:44:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:20,587 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 983 transitions. [2019-10-15 01:44:20,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:20,587 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 983 transitions. [2019-10-15 01:44:20,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-15 01:44:20,592 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:20,592 INFO L380 BasicCegarLoop]: trace histogram [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, 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 01:44:20,593 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -763512625, now seen corresponding path program 1 times [2019-10-15 01:44:20,594 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:20,594 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124058439] [2019-10-15 01:44:20,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:20,594 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:20,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:20,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124058439] [2019-10-15 01:44:20,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:20,836 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:20,836 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597439347] [2019-10-15 01:44:20,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:20,838 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:20,843 INFO L87 Difference]: Start difference. First operand 595 states and 983 transitions. Second operand 3 states. [2019-10-15 01:44:21,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:21,861 INFO L93 Difference]: Finished difference Result 1773 states and 2983 transitions. [2019-10-15 01:44:21,861 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:21,862 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 163 [2019-10-15 01:44:21,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:21,870 INFO L225 Difference]: With dead ends: 1773 [2019-10-15 01:44:21,870 INFO L226 Difference]: Without dead ends: 1183 [2019-10-15 01:44:21,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2019-10-15 01:44:21,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 1183. [2019-10-15 01:44:21,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1183 states. [2019-10-15 01:44:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 1943 transitions. [2019-10-15 01:44:21,934 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 1943 transitions. Word has length 163 [2019-10-15 01:44:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:21,935 INFO L462 AbstractCegarLoop]: Abstraction has 1183 states and 1943 transitions. [2019-10-15 01:44:21,935 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 1943 transitions. [2019-10-15 01:44:21,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-15 01:44:21,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:21,942 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:21,942 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:21,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1767076692, now seen corresponding path program 1 times [2019-10-15 01:44:21,943 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:21,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457980489] [2019-10-15 01:44:21,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:21,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:21,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:22,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:22,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457980489] [2019-10-15 01:44:22,058 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:22,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:44:22,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933168507] [2019-10-15 01:44:22,060 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:44:22,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:22,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:44:22,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:44:22,060 INFO L87 Difference]: Start difference. First operand 1183 states and 1943 transitions. Second operand 6 states. [2019-10-15 01:44:23,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:23,592 INFO L93 Difference]: Finished difference Result 3649 states and 6586 transitions. [2019-10-15 01:44:23,593 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:23,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 166 [2019-10-15 01:44:23,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:23,624 INFO L225 Difference]: With dead ends: 3649 [2019-10-15 01:44:23,625 INFO L226 Difference]: Without dead ends: 2471 [2019-10-15 01:44:23,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 01:44:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2471 states. [2019-10-15 01:44:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2471 to 2397. [2019-10-15 01:44:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2397 states. [2019-10-15 01:44:23,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2397 states to 2397 states and 4013 transitions. [2019-10-15 01:44:23,781 INFO L78 Accepts]: Start accepts. Automaton has 2397 states and 4013 transitions. Word has length 166 [2019-10-15 01:44:23,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:23,782 INFO L462 AbstractCegarLoop]: Abstraction has 2397 states and 4013 transitions. [2019-10-15 01:44:23,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:23,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2397 states and 4013 transitions. [2019-10-15 01:44:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:44:23,792 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:23,792 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:23,792 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:23,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:23,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1452481995, now seen corresponding path program 1 times [2019-10-15 01:44:23,793 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:23,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248703607] [2019-10-15 01:44:23,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:23,794 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:23,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:23,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:23,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248703607] [2019-10-15 01:44:23,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:23,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:44:23,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213500949] [2019-10-15 01:44:23,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:44:23,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:44:23,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:44:23,932 INFO L87 Difference]: Start difference. First operand 2397 states and 4013 transitions. Second operand 6 states. [2019-10-15 01:44:25,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:25,429 INFO L93 Difference]: Finished difference Result 7162 states and 13203 transitions. [2019-10-15 01:44:25,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:25,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 171 [2019-10-15 01:44:25,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:25,462 INFO L225 Difference]: With dead ends: 7162 [2019-10-15 01:44:25,463 INFO L226 Difference]: Without dead ends: 4770 [2019-10-15 01:44:25,471 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 01:44:25,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2019-10-15 01:44:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 4694. [2019-10-15 01:44:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4694 states. [2019-10-15 01:44:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4694 states to 4694 states and 7852 transitions. [2019-10-15 01:44:25,700 INFO L78 Accepts]: Start accepts. Automaton has 4694 states and 7852 transitions. Word has length 171 [2019-10-15 01:44:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:25,701 INFO L462 AbstractCegarLoop]: Abstraction has 4694 states and 7852 transitions. [2019-10-15 01:44:25,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:44:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 4694 states and 7852 transitions. [2019-10-15 01:44:25,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-10-15 01:44:25,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:25,721 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:25,722 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:25,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:25,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1765869504, now seen corresponding path program 1 times [2019-10-15 01:44:25,723 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:25,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882755012] [2019-10-15 01:44:25,723 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:25,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:25,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:25,888 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 33 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:25,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882755012] [2019-10-15 01:44:25,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883816984] [2019-10-15 01:44:25,890 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 01:44:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:26,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:44:26,200 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:44:26,403 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-15 01:44:26,487 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 01:44:26,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-15 01:44:26,488 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417724005] [2019-10-15 01:44:26,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:26,489 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:44:26,489 INFO L87 Difference]: Start difference. First operand 4694 states and 7852 transitions. Second operand 3 states. [2019-10-15 01:44:27,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:27,667 INFO L93 Difference]: Finished difference Result 13398 states and 23056 transitions. [2019-10-15 01:44:27,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:27,668 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 178 [2019-10-15 01:44:27,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:27,734 INFO L225 Difference]: With dead ends: 13398 [2019-10-15 01:44:27,735 INFO L226 Difference]: Without dead ends: 8709 [2019-10-15 01:44:27,751 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 354 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:44:27,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8709 states. [2019-10-15 01:44:28,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8709 to 8266. [2019-10-15 01:44:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8266 states. [2019-10-15 01:44:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8266 states to 8266 states and 14231 transitions. [2019-10-15 01:44:28,135 INFO L78 Accepts]: Start accepts. Automaton has 8266 states and 14231 transitions. Word has length 178 [2019-10-15 01:44:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:28,137 INFO L462 AbstractCegarLoop]: Abstraction has 8266 states and 14231 transitions. [2019-10-15 01:44:28,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8266 states and 14231 transitions. [2019-10-15 01:44:28,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 01:44:28,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:28,175 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:44:28,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:28,505 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:28,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:28,506 INFO L82 PathProgramCache]: Analyzing trace with hash 112488247, now seen corresponding path program 1 times [2019-10-15 01:44:28,506 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:28,506 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039765149] [2019-10-15 01:44:28,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:28,506 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:28,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:28,725 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:28,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039765149] [2019-10-15 01:44:28,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184313014] [2019-10-15 01:44:28,727 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 01:44:28,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:28,982 INFO L256 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 01:44:28,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-15 01:44:29,068 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:44:29,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:44:29,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:44:29,144 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507358991] [2019-10-15 01:44:29,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:44:29,145 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:29,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:44:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:44:29,147 INFO L87 Difference]: Start difference. First operand 8266 states and 14231 transitions. Second operand 5 states. [2019-10-15 01:44:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:30,604 INFO L93 Difference]: Finished difference Result 18748 states and 33874 transitions. [2019-10-15 01:44:30,604 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:44:30,604 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 183 [2019-10-15 01:44:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:30,689 INFO L225 Difference]: With dead ends: 18748 [2019-10-15 01:44:30,689 INFO L226 Difference]: Without dead ends: 10487 [2019-10-15 01:44:30,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:44:30,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10487 states. [2019-10-15 01:44:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10487 to 10212. [2019-10-15 01:44:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10212 states. [2019-10-15 01:44:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10212 states to 10212 states and 17569 transitions. [2019-10-15 01:44:31,175 INFO L78 Accepts]: Start accepts. Automaton has 10212 states and 17569 transitions. Word has length 183 [2019-10-15 01:44:31,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:31,175 INFO L462 AbstractCegarLoop]: Abstraction has 10212 states and 17569 transitions. [2019-10-15 01:44:31,175 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:44:31,175 INFO L276 IsEmpty]: Start isEmpty. Operand 10212 states and 17569 transitions. [2019-10-15 01:44:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-15 01:44:31,221 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:31,221 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 01:44:31,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:44:31,426 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:31,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:31,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1988359256, now seen corresponding path program 1 times [2019-10-15 01:44:31,427 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:31,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734152664] [2019-10-15 01:44:31,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:31,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:31,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:31,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734152664] [2019-10-15 01:44:31,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619433954] [2019-10-15 01:44:31,578 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 01:44:31,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:31,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 01:44:31,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:31,801 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:31,802 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:31,882 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [709090282] [2019-10-15 01:44:31,949 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:44:31,949 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:44:31,959 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:44:31,970 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:44:31,971 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:44:32,288 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:44:32,971 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-10-15 01:44:33,220 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:44:33,519 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:44:33,669 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 215 [2019-10-15 01:44:33,947 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:44:35,242 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 290 DAG size of output: 290 [2019-10-15 01:44:37,330 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 248 [2019-10-15 01:44:37,943 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 219 [2019-10-15 01:44:38,158 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 361 [2019-10-15 01:44:38,423 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 363 [2019-10-15 01:44:38,533 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:38,800 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 366 [2019-10-15 01:44:38,961 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2019-10-15 01:44:39,687 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 251 [2019-10-15 01:44:40,667 WARN L191 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 362 DAG size of output: 362 [2019-10-15 01:44:40,873 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 364 [2019-10-15 01:44:41,025 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 365 DAG size of output: 365 [2019-10-15 01:44:41,866 WARN L191 SmtUtils]: Spent 501.00 ms on a formula simplification that was a NOOP. DAG size: 172