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_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:43:55,963 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-10-15 01:43:55,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:43:55,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:43:55,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:43:56,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:43:56,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:43:56,007 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:43:56,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:43:56,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:43:56,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:43:56,021 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:43:56,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:43:56,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:43:56,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:43:56,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:43:56,043 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:43:56,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:43:56,051 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 01:43:56,068 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:43:56,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:43:56,070 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:43:56,070 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:43:56,070 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:43:56,071 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:43:56,071 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:43:56,071 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:43:56,071 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:43:56,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:43:56,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:43:56,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:43:56,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:43:56,072 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:43:56,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:43:56,073 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:43:56,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:43:56,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:43:56,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:43:56,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:43:56,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:43:56,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:43:56,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:43:56,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:43:56,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:43:56,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:43:56,075 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:43:56,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:43:56,075 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 01:43:56,387 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:43:56,404 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:43:56,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:43:56,410 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:43:56,410 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:43:56,411 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-10-15 01:43:56,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bbd4481/eaab4f09dc5b4c69b7a5afe76ab01359/FLAGdc635ae82 [2019-10-15 01:43:57,140 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:43:57,143 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-10-15 01:43:57,164 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bbd4481/eaab4f09dc5b4c69b7a5afe76ab01359/FLAGdc635ae82 [2019-10-15 01:43:57,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7bbd4481/eaab4f09dc5b4c69b7a5afe76ab01359 [2019-10-15 01:43:57,364 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:43:57,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:43:57,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:57,367 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:43:57,370 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:43:57,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:57" (1/1) ... [2019-10-15 01:43:57,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2837cd28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:57, skipping insertion in model container [2019-10-15 01:43:57,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:43:57" (1/1) ... [2019-10-15 01:43:57,382 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:43:57,466 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:43:58,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:58,334 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:43:58,668 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:43:58,692 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:43:58,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58 WrapperNode [2019-10-15 01:43:58,693 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:43:58,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:43:58,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:43:58,695 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:43:58,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,832 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,880 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (1/1) ... [2019-10-15 01:43:58,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:43:58,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:43:58,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:43:58,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:43:58,893 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (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 01:43:58,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:43:58,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:43:58,963 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:43:58,963 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:43:58,963 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:43:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:43:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:43:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:43:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:43:58,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:43:58,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:44:02,246 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:44:02,246 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:44:02,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:44:02 BoogieIcfgContainer [2019-10-15 01:44:02,248 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:44:02,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:44:02,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:44:02,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:44:02,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:43:57" (1/3) ... [2019-10-15 01:44:02,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb47625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:44:02, skipping insertion in model container [2019-10-15 01:44:02,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:43:58" (2/3) ... [2019-10-15 01:44:02,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2eb47625 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:44:02, skipping insertion in model container [2019-10-15 01:44:02,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:44:02" (3/3) ... [2019-10-15 01:44:02,262 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2019-10-15 01:44:02,274 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:44:02,284 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:44:02,296 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:44:02,323 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:44:02,323 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:44:02,323 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:44:02,323 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:44:02,324 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:44:02,324 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:44:02,324 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:44:02,324 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:44:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states. [2019-10-15 01:44:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-15 01:44:02,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:02,363 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 01:44:02,365 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash 136478502, now seen corresponding path program 1 times [2019-10-15 01:44:02,381 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:02,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387267208] [2019-10-15 01:44:02,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:02,382 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:02,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:03,112 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 01:44:03,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387267208] [2019-10-15 01:44:03,114 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:03,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:03,116 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509520748] [2019-10-15 01:44:03,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:03,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:03,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:03,142 INFO L87 Difference]: Start difference. First operand 158 states. Second operand 3 states. [2019-10-15 01:44:04,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:04,336 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2019-10-15 01:44:04,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:04,338 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 149 [2019-10-15 01:44:04,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:04,356 INFO L225 Difference]: With dead ends: 462 [2019-10-15 01:44:04,357 INFO L226 Difference]: Without dead ends: 301 [2019-10-15 01:44:04,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 01:44:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2019-10-15 01:44:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2019-10-15 01:44:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2019-10-15 01:44:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 529 transitions. [2019-10-15 01:44:04,444 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 529 transitions. Word has length 149 [2019-10-15 01:44:04,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:04,445 INFO L462 AbstractCegarLoop]: Abstraction has 301 states and 529 transitions. [2019-10-15 01:44:04,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:04,446 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 529 transitions. [2019-10-15 01:44:04,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 01:44:04,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:04,451 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 01:44:04,452 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:04,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1532423406, now seen corresponding path program 1 times [2019-10-15 01:44:04,452 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:04,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530121426] [2019-10-15 01:44:04,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:04,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:04,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:04,710 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 01:44:04,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530121426] [2019-10-15 01:44:04,711 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:44:04,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:44:04,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342058696] [2019-10-15 01:44:04,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:44:04,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:44:04,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:44:04,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:44:04,714 INFO L87 Difference]: Start difference. First operand 301 states and 529 transitions. Second operand 3 states. [2019-10-15 01:44:05,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:44:05,655 INFO L93 Difference]: Finished difference Result 891 states and 1588 transitions. [2019-10-15 01:44:05,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:44:05,656 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-15 01:44:05,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:44:05,664 INFO L225 Difference]: With dead ends: 891 [2019-10-15 01:44:05,665 INFO L226 Difference]: Without dead ends: 595 [2019-10-15 01:44:05,668 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 01:44:05,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2019-10-15 01:44:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 595. [2019-10-15 01:44:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-15 01:44:05,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1019 transitions. [2019-10-15 01:44:05,715 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1019 transitions. Word has length 161 [2019-10-15 01:44:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:44:05,716 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 1019 transitions. [2019-10-15 01:44:05,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:44:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1019 transitions. [2019-10-15 01:44:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-10-15 01:44:05,723 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:44:05,723 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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 01:44:05,723 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:44:05,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:44:05,724 INFO L82 PathProgramCache]: Analyzing trace with hash -924618206, now seen corresponding path program 1 times [2019-10-15 01:44:05,724 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:44:05,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291115781] [2019-10-15 01:44:05,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:44:05,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:44:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:05,890 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:05,891 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291115781] [2019-10-15 01:44:05,892 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301859589] [2019-10-15 01:44:05,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 01:44:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:44:06,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 1050 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:44:06,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:44:06,341 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:06,341 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:44:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:44:06,470 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099941988] [2019-10-15 01:44:06,528 INFO L162 IcfgInterpreter]: Started Sifa with 153 locations of interest [2019-10-15 01:44:06,529 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:44:06,536 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:44:06,551 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:44:06,552 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:44:07,316 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 182 [2019-10-15 01:44:07,518 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 208 for LOIs [2019-10-15 01:44:07,788 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2019-10-15 01:44:08,118 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2019-10-15 01:44:08,417 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 310 [2019-10-15 01:44:09,488 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 318 DAG size of output: 318 [2019-10-15 01:44:11,472 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 279 [2019-10-15 01:44:12,218 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-10-15 01:44:12,325 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-10-15 01:44:12,584 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 362 [2019-10-15 01:44:12,711 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:13,009 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 365 [2019-10-15 01:44:13,117 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2019-10-15 01:44:13,777 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 276 [2019-10-15 01:44:14,065 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 269 [2019-10-15 01:44:14,443 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 369 DAG size of output: 362 [2019-10-15 01:44:14,547 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-10-15 01:44:14,879 WARN L191 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-10-15 01:44:15,093 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 370 DAG size of output: 365 [2019-10-15 01:44:15,197 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 363 [2019-10-15 01:44:15,391 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 364 DAG size of output: 364 [2019-10-15 01:44:15,901 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 276 DAG size of output: 276 [2019-10-15 01:44:16,139 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 271 [2019-10-15 01:44:16,518 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 363 DAG size of output: 361 [2019-10-15 01:44:16,622 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 360 [2019-10-15 01:44:16,773 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 361 DAG size of output: 361 [2019-10-15 01:44:17,171 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 372 DAG size of output: 367 [2019-10-15 01:44:18,407 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 368 [2019-10-15 01:44:18,729 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 274 DAG size of output: 274 [2019-10-15 01:44:19,170 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 279 [2019-10-15 01:44:19,411 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 279 DAG size of output: 274 [2019-10-15 01:44:19,673 INFO L199 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 168 for LOIs [2019-10-15 01:44:24,066 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 110