/usr/bin/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_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:42:05,955 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:42:06,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:42:06,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:42:06,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:42:06,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:42:06,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:42:06,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:42:06,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:42:06,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:42:06,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:42:06,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:42:06,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:42:06,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:42:06,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:42:06,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:42:06,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:42:06,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:42:06,047 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 [2019-11-07 01:42:06,075 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:42:06,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:42:06,078 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:42:06,078 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:42:06,078 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:42:06,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:42:06,079 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:42:06,079 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:42:06,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:42:06,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:42:06,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:42:06,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:42:06,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:42:06,081 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:42:06,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:42:06,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:42:06,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:42:06,082 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:42:06,082 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:42:06,082 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:42:06,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:42:06,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:42:06,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:42:06,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:42:06,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:42:06,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:42:06,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:42:06,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:42:06,084 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 [2019-11-07 01:42:06,365 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:42:06,379 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:42:06,382 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:42:06,384 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:42:06,384 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:42:06,385 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-11-07 01:42:06,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824a55662/b981c585301b4c55a628e2cef3453e28/FLAG8facb14d9 [2019-11-07 01:42:07,095 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:42:07,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label31.c [2019-11-07 01:42:07,116 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824a55662/b981c585301b4c55a628e2cef3453e28/FLAG8facb14d9 [2019-11-07 01:42:07,300 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/824a55662/b981c585301b4c55a628e2cef3453e28 [2019-11-07 01:42:07,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:42:07,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:42:07,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:07,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:42:07,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:42:07,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:07" (1/1) ... [2019-11-07 01:42:07,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d184af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:07, skipping insertion in model container [2019-11-07 01:42:07,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:42:07" (1/1) ... [2019-11-07 01:42:07,329 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:42:07,420 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:42:08,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:08,257 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:42:08,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:42:08,688 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:42:08,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08 WrapperNode [2019-11-07 01:42:08,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:42:08,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:42:08,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:42:08,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:42:08,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (1/1) ... [2019-11-07 01:42:08,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:42:08,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:42:08,894 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:42:08,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:42:08,895 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (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 [2019-11-07 01:42:08,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:42:08,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:42:08,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-07 01:42:08,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:42:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-07 01:42:08,965 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:42:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:42:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-07 01:42:08,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:42:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:42:08,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:42:12,087 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:42:12,087 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 01:42:12,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:12 BoogieIcfgContainer [2019-11-07 01:42:12,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:42:12,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:42:12,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:42:12,099 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:42:12,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:42:07" (1/3) ... [2019-11-07 01:42:12,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e818f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:12, skipping insertion in model container [2019-11-07 01:42:12,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:42:08" (2/3) ... [2019-11-07 01:42:12,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e818f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:42:12, skipping insertion in model container [2019-11-07 01:42:12,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:42:12" (3/3) ... [2019-11-07 01:42:12,110 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label31.c [2019-11-07 01:42:12,121 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:42:12,130 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:42:12,142 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:42:12,179 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:42:12,179 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:42:12,179 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:42:12,180 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:42:12,180 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:42:12,180 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:42:12,180 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:42:12,181 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:42:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-11-07 01:42:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-11-07 01:42:12,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:12,229 INFO L410 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] [2019-11-07 01:42:12,231 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:12,237 INFO L82 PathProgramCache]: Analyzing trace with hash 136465702, now seen corresponding path program 1 times [2019-11-07 01:42:12,247 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:12,248 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611305543] [2019-11-07 01:42:12,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:13,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:13,085 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611305543] [2019-11-07 01:42:13,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:13,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-07 01:42:13,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35314279] [2019-11-07 01:42:13,096 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-07 01:42:13,097 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:42:13,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-07 01:42:13,115 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 4 states. [2019-11-07 01:42:14,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:14,785 INFO L93 Difference]: Finished difference Result 613 states and 1182 transitions. [2019-11-07 01:42:14,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-07 01:42:14,788 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 149 [2019-11-07 01:42:14,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:14,810 INFO L225 Difference]: With dead ends: 613 [2019-11-07 01:42:14,810 INFO L226 Difference]: Without dead ends: 448 [2019-11-07 01:42:14,816 INFO L630 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 [2019-11-07 01:42:14,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2019-11-07 01:42:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 301. [2019-11-07 01:42:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-11-07 01:42:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 579 transitions. [2019-11-07 01:42:14,931 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 579 transitions. Word has length 149 [2019-11-07 01:42:14,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:14,932 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 579 transitions. [2019-11-07 01:42:14,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-07 01:42:14,933 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 579 transitions. [2019-11-07 01:42:14,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-11-07 01:42:14,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:14,939 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:14,939 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:14,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:14,940 INFO L82 PathProgramCache]: Analyzing trace with hash -20880474, now seen corresponding path program 1 times [2019-11-07 01:42:14,940 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:14,940 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550740852] [2019-11-07 01:42:14,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:15,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550740852] [2019-11-07 01:42:15,103 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:15,103 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-07 01:42:15,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253596997] [2019-11-07 01:42:15,109 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:15,109 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:42:15,110 INFO L87 Difference]: Start difference. First operand 301 states and 579 transitions. Second operand 5 states. [2019-11-07 01:42:16,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:16,366 INFO L93 Difference]: Finished difference Result 913 states and 1781 transitions. [2019-11-07 01:42:16,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:16,369 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-11-07 01:42:16,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:16,374 INFO L225 Difference]: With dead ends: 913 [2019-11-07 01:42:16,374 INFO L226 Difference]: Without dead ends: 617 [2019-11-07 01:42:16,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:42:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2019-11-07 01:42:16,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 601. [2019-11-07 01:42:16,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 601 states. [2019-11-07 01:42:16,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1102 transitions. [2019-11-07 01:42:16,428 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1102 transitions. Word has length 157 [2019-11-07 01:42:16,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:16,429 INFO L462 AbstractCegarLoop]: Abstraction has 601 states and 1102 transitions. [2019-11-07 01:42:16,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:16,429 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1102 transitions. [2019-11-07 01:42:16,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-07 01:42:16,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:16,436 INFO L410 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] [2019-11-07 01:42:16,437 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:16,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:16,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1532436206, now seen corresponding path program 1 times [2019-11-07 01:42:16,437 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:16,438 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534323778] [2019-11-07 01:42:16,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:16,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:16,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534323778] [2019-11-07 01:42:16,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074245125] [2019-11-07 01:42:16,730 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 [2019-11-07 01:42:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:16,935 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:42:16,950 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:17,151 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:17,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:17,251 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-07 01:42:17,255 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-11-07 01:42:17,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870093363] [2019-11-07 01:42:17,258 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:42:17,258 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:42:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:42:17,259 INFO L87 Difference]: Start difference. First operand 601 states and 1102 transitions. Second operand 3 states. [2019-11-07 01:42:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:18,157 INFO L93 Difference]: Finished difference Result 1791 states and 3345 transitions. [2019-11-07 01:42:18,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:42:18,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-07 01:42:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:18,171 INFO L225 Difference]: With dead ends: 1791 [2019-11-07 01:42:18,172 INFO L226 Difference]: Without dead ends: 1195 [2019-11-07 01:42:18,174 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 323 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-07 01:42:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2019-11-07 01:42:18,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1046. [2019-11-07 01:42:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1046 states. [2019-11-07 01:42:18,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1690 transitions. [2019-11-07 01:42:18,229 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1690 transitions. Word has length 161 [2019-11-07 01:42:18,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:18,230 INFO L462 AbstractCegarLoop]: Abstraction has 1046 states and 1690 transitions. [2019-11-07 01:42:18,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:42:18,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1690 transitions. [2019-11-07 01:42:18,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-07 01:42:18,238 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:18,239 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-11-07 01:42:18,444 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:18,445 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:18,446 INFO L82 PathProgramCache]: Analyzing trace with hash 634687016, now seen corresponding path program 1 times [2019-11-07 01:42:18,447 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:18,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884055902] [2019-11-07 01:42:18,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:18,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:42:18,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884055902] [2019-11-07 01:42:18,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590693246] [2019-11-07 01:42:18,682 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 [2019-11-07 01:42:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:18,899 INFO L256 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:42:18,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:42:18,966 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:19,086 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:42:19,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:42:19,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:42:19,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496704164] [2019-11-07 01:42:19,088 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:19,088 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:19,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:19,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:42:19,090 INFO L87 Difference]: Start difference. First operand 1046 states and 1690 transitions. Second operand 5 states. [2019-11-07 01:42:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:20,432 INFO L93 Difference]: Finished difference Result 2586 states and 4445 transitions. [2019-11-07 01:42:20,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:42:20,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2019-11-07 01:42:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:20,445 INFO L225 Difference]: With dead ends: 2586 [2019-11-07 01:42:20,445 INFO L226 Difference]: Without dead ends: 1545 [2019-11-07 01:42:20,449 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 352 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:42:20,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1545 states. [2019-11-07 01:42:20,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1545 to 1523. [2019-11-07 01:42:20,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1523 states. [2019-11-07 01:42:20,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1523 states to 1523 states and 2574 transitions. [2019-11-07 01:42:20,512 INFO L78 Accepts]: Start accepts. Automaton has 1523 states and 2574 transitions. Word has length 179 [2019-11-07 01:42:20,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:20,512 INFO L462 AbstractCegarLoop]: Abstraction has 1523 states and 2574 transitions. [2019-11-07 01:42:20,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:20,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1523 states and 2574 transitions. [2019-11-07 01:42:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-11-07 01:42:20,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:20,519 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:20,725 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:20,726 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:20,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:20,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1771941393, now seen corresponding path program 1 times [2019-11-07 01:42:20,726 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:20,727 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608519960] [2019-11-07 01:42:20,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:20,885 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608519960] [2019-11-07 01:42:20,885 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:20,885 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:42:20,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562299597] [2019-11-07 01:42:20,886 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:42:20,887 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:42:20,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:42:20,888 INFO L87 Difference]: Start difference. First operand 1523 states and 2574 transitions. Second operand 6 states. [2019-11-07 01:42:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:22,375 INFO L93 Difference]: Finished difference Result 3550 states and 6246 transitions. [2019-11-07 01:42:22,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 01:42:22,376 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2019-11-07 01:42:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:22,392 INFO L225 Difference]: With dead ends: 3550 [2019-11-07 01:42:22,392 INFO L226 Difference]: Without dead ends: 2032 [2019-11-07 01:42:22,398 INFO L630 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 [2019-11-07 01:42:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-11-07 01:42:22,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2010. [2019-11-07 01:42:22,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2010 states. [2019-11-07 01:42:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 3240 transitions. [2019-11-07 01:42:22,492 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 3240 transitions. Word has length 180 [2019-11-07 01:42:22,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:22,492 INFO L462 AbstractCegarLoop]: Abstraction has 2010 states and 3240 transitions. [2019-11-07 01:42:22,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:42:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 3240 transitions. [2019-11-07 01:42:22,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-11-07 01:42:22,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:22,501 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:22,501 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:22,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:22,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1339448481, now seen corresponding path program 1 times [2019-11-07 01:42:22,502 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:22,502 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363029961] [2019-11-07 01:42:22,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:22,642 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:22,643 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363029961] [2019-11-07 01:42:22,643 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:42:22,643 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-07 01:42:22,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540935734] [2019-11-07 01:42:22,644 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-07 01:42:22,644 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-07 01:42:22,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-07 01:42:22,645 INFO L87 Difference]: Start difference. First operand 2010 states and 3240 transitions. Second operand 6 states. [2019-11-07 01:42:24,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:24,157 INFO L93 Difference]: Finished difference Result 5897 states and 9958 transitions. [2019-11-07 01:42:24,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:24,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 183 [2019-11-07 01:42:24,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:24,188 INFO L225 Difference]: With dead ends: 5897 [2019-11-07 01:42:24,189 INFO L226 Difference]: Without dead ends: 3892 [2019-11-07 01:42:24,195 INFO L630 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 [2019-11-07 01:42:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2019-11-07 01:42:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3272. [2019-11-07 01:42:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3272 states. [2019-11-07 01:42:24,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5371 transitions. [2019-11-07 01:42:24,321 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5371 transitions. Word has length 183 [2019-11-07 01:42:24,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:24,321 INFO L462 AbstractCegarLoop]: Abstraction has 3272 states and 5371 transitions. [2019-11-07 01:42:24,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-07 01:42:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5371 transitions. [2019-11-07 01:42:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-11-07 01:42:24,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:24,334 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:24,334 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:24,335 INFO L82 PathProgramCache]: Analyzing trace with hash -239018380, now seen corresponding path program 1 times [2019-11-07 01:42:24,335 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:24,335 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233436449] [2019-11-07 01:42:24,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:24,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:24,486 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:24,486 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233436449] [2019-11-07 01:42:24,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146470232] [2019-11-07 01:42:24,487 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 [2019-11-07 01:42:24,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:24,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-07 01:42:24,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-11-07 01:42:24,804 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 47 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 01:42:24,888 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:42:24,889 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-07 01:42:24,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736057337] [2019-11-07 01:42:24,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-07 01:42:24,890 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:42:24,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-07 01:42:24,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-07 01:42:24,892 INFO L87 Difference]: Start difference. First operand 3272 states and 5371 transitions. Second operand 5 states. [2019-11-07 01:42:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:42:26,482 INFO L93 Difference]: Finished difference Result 9606 states and 17002 transitions. [2019-11-07 01:42:26,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-07 01:42:26,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-11-07 01:42:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:42:26,532 INFO L225 Difference]: With dead ends: 9606 [2019-11-07 01:42:26,533 INFO L226 Difference]: Without dead ends: 6339 [2019-11-07 01:42:26,545 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-11-07 01:42:26,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2019-11-07 01:42:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 6098. [2019-11-07 01:42:26,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6098 states. [2019-11-07 01:42:26,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6098 states to 6098 states and 10143 transitions. [2019-11-07 01:42:26,793 INFO L78 Accepts]: Start accepts. Automaton has 6098 states and 10143 transitions. Word has length 202 [2019-11-07 01:42:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:42:26,793 INFO L462 AbstractCegarLoop]: Abstraction has 6098 states and 10143 transitions. [2019-11-07 01:42:26,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-07 01:42:26,793 INFO L276 IsEmpty]: Start isEmpty. Operand 6098 states and 10143 transitions. [2019-11-07 01:42:26,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-07 01:42:26,818 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:42:26,818 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:42:27,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:27,025 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:42:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:42:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 2134020120, now seen corresponding path program 1 times [2019-11-07 01:42:27,025 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:42:27,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095020580] [2019-11-07 01:42:27,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:42:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:27,202 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095020580] [2019-11-07 01:42:27,203 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886261770] [2019-11-07 01:42:27,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:42:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:42:27,629 INFO L256 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-07 01:42:27,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:42:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:27,715 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:42:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 01:42:27,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [406405664] [2019-11-07 01:42:27,860 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-11-07 01:42:27,860 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:42:27,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:42:27,881 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:42:27,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:42:28,238 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 206 for LOIs [2019-11-07 01:42:29,579 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 226 [2019-11-07 01:42:30,010 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-07 01:42:30,183 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 218 [2019-11-07 01:42:30,370 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 219 [2019-11-07 01:42:31,113 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 367 [2019-11-07 01:42:31,443 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 367 [2019-11-07 01:42:31,766 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification that was a NOOP. DAG size: 377 [2019-11-07 01:42:32,203 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 377 [2019-11-07 01:42:32,470 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 168 for LOIs [2019-11-07 01:42:33,287 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 117 [2019-11-07 01:42:33,635 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 117 [2019-11-07 01:42:33,903 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 117 [2019-11-07 01:42:34,031 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:34,686 WARN L191 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 117 [2019-11-07 01:42:35,074 WARN L191 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 117 [2019-11-07 01:42:35,312 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 117 [2019-11-07 01:42:35,659 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2019-11-07 01:42:35,789 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:35,965 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 117 [2019-11-07 01:42:36,122 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:36,522 WARN L191 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2019-11-07 01:42:36,839 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 117 [2019-11-07 01:42:36,987 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:37,227 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 117 [2019-11-07 01:42:37,463 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 117 [2019-11-07 01:42:37,825 WARN L191 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 117 [2019-11-07 01:42:38,186 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:38,420 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 117 [2019-11-07 01:42:38,542 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:38,829 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 117 [2019-11-07 01:42:39,068 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 117 [2019-11-07 01:42:39,178 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2019-11-07 01:42:39,790 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 117 [2019-11-07 01:42:39,916 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 117