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/Problem02_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:41:00,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:41:00,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:41:00,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:41:00,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:41:00,097 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:41:00,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:41:00,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:41:00,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:41:00,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:41:00,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:41:00,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:41:00,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:41:00,119 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:41:00,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:41:00,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:41:00,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:41:00,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:41:00,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:41:00,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:41:00,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:41:00,152 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:41:00,153 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:41:00,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:41:00,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:41:00,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:41:00,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:41:00,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:41:00,178 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 [2019-10-13 21:41:00,198 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:41:00,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:41:00,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:41:00,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:41:00,200 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:41:00,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:41:00,201 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:41:00,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:41:00,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:41:00,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:41:00,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:41:00,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:41:00,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:41:00,202 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:41:00,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:41:00,203 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:41:00,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:41:00,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:41:00,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:41:00,203 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:41:00,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:41:00,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:00,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:41:00,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:41:00,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:41:00,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:41:00,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:41:00,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:41:00,205 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 [2019-10-13 21:41:00,470 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:41:00,484 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:41:00,488 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:41:00,489 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:41:00,490 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:41:00,490 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-10-13 21:41:00,552 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07ea61c11/7fe6f9514fdc4514a35ba57f499dd77f/FLAG36f02c61b [2019-10-13 21:41:01,140 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:41:01,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label14.c [2019-10-13 21:41:01,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07ea61c11/7fe6f9514fdc4514a35ba57f499dd77f/FLAG36f02c61b [2019-10-13 21:41:01,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/07ea61c11/7fe6f9514fdc4514a35ba57f499dd77f [2019-10-13 21:41:01,420 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:41:01,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:41:01,423 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:01,423 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:41:01,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:41:01,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbd8e3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:01, skipping insertion in model container [2019-10-13 21:41:01,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:41:01" (1/1) ... [2019-10-13 21:41:01,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:41:01,490 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:41:01,998 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:02,007 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:41:02,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:41:02,185 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:41:02,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02 WrapperNode [2019-10-13 21:41:02,186 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:41:02,187 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:41:02,187 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:41:02,187 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:41:02,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,215 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... [2019-10-13 21:41:02,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:41:02,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:41:02,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:41:02,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:41:02,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:41:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:41:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:41:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:41:02,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:41:02,383 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:41:02,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:41:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:41:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:41:02,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:41:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:41:02,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:41:04,407 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:41:04,407 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:41:04,409 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:04 BoogieIcfgContainer [2019-10-13 21:41:04,409 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:41:04,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:41:04,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:41:04,417 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:41:04,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:41:01" (1/3) ... [2019-10-13 21:41:04,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5154348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:04, skipping insertion in model container [2019-10-13 21:41:04,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:41:02" (2/3) ... [2019-10-13 21:41:04,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5154348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:41:04, skipping insertion in model container [2019-10-13 21:41:04,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:41:04" (3/3) ... [2019-10-13 21:41:04,431 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label14.c [2019-10-13 21:41:04,444 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:41:04,455 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:41:04,469 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:41:04,508 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:41:04,508 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:41:04,509 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:41:04,509 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:41:04,509 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:41:04,509 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:41:04,510 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:41:04,510 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:41:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states. [2019-10-13 21:41:04,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 21:41:04,556 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:04,558 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] [2019-10-13 21:41:04,560 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash -219361225, now seen corresponding path program 1 times [2019-10-13 21:41:04,574 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:04,575 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517845465] [2019-10-13 21:41:04,575 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:04,575 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:04,576 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:04,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:05,120 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517845465] [2019-10-13 21:41:05,121 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:05,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:05,123 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604236020] [2019-10-13 21:41:05,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:05,132 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:05,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:05,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:05,154 INFO L87 Difference]: Start difference. First operand 95 states. Second operand 3 states. [2019-10-13 21:41:05,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:05,808 INFO L93 Difference]: Finished difference Result 273 states and 508 transitions. [2019-10-13 21:41:05,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:05,811 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 86 [2019-10-13 21:41:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:05,826 INFO L225 Difference]: With dead ends: 273 [2019-10-13 21:41:05,826 INFO L226 Difference]: Without dead ends: 175 [2019-10-13 21:41:05,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-13 21:41:05,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2019-10-13 21:41:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-10-13 21:41:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 312 transitions. [2019-10-13 21:41:05,906 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 312 transitions. Word has length 86 [2019-10-13 21:41:05,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:05,907 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 312 transitions. [2019-10-13 21:41:05,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:05,908 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 312 transitions. [2019-10-13 21:41:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-13 21:41:05,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:05,913 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:05,914 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:05,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:05,914 INFO L82 PathProgramCache]: Analyzing trace with hash -701896004, now seen corresponding path program 1 times [2019-10-13 21:41:05,914 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:05,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288808581] [2019-10-13 21:41:05,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:05,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:05,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:06,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288808581] [2019-10-13 21:41:06,080 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:06,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:41:06,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741758717] [2019-10-13 21:41:06,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:06,082 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:06,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:06,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:41:06,083 INFO L87 Difference]: Start difference. First operand 175 states and 312 transitions. Second operand 3 states. [2019-10-13 21:41:06,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:06,498 INFO L93 Difference]: Finished difference Result 513 states and 937 transitions. [2019-10-13 21:41:06,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:06,498 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2019-10-13 21:41:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:06,512 INFO L225 Difference]: With dead ends: 513 [2019-10-13 21:41:06,512 INFO L226 Difference]: Without dead ends: 343 [2019-10-13 21:41:06,514 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 [2019-10-13 21:41:06,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2019-10-13 21:41:06,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2019-10-13 21:41:06,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-10-13 21:41:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 580 transitions. [2019-10-13 21:41:06,568 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 580 transitions. Word has length 94 [2019-10-13 21:41:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:06,569 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 580 transitions. [2019-10-13 21:41:06,569 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 580 transitions. [2019-10-13 21:41:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-13 21:41:06,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:06,578 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:06,579 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:06,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1247420168, now seen corresponding path program 1 times [2019-10-13 21:41:06,580 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:06,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85374221] [2019-10-13 21:41:06,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:06,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:06,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:06,806 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 21:41:06,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85374221] [2019-10-13 21:41:06,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281888977] [2019-10-13 21:41:06,808 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 [2019-10-13 21:41:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:06,905 INFO L256 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:06,915 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:06,981 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:07,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:07,043 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 21:41:07,043 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-10-13 21:41:07,044 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15433182] [2019-10-13 21:41:07,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:41:07,047 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:07,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:41:07,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:41:07,048 INFO L87 Difference]: Start difference. First operand 343 states and 580 transitions. Second operand 3 states. [2019-10-13 21:41:07,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:07,442 INFO L93 Difference]: Finished difference Result 681 states and 1181 transitions. [2019-10-13 21:41:07,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:41:07,443 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-13 21:41:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:07,449 INFO L225 Difference]: With dead ends: 681 [2019-10-13 21:41:07,449 INFO L226 Difference]: Without dead ends: 679 [2019-10-13 21:41:07,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:41:07,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2019-10-13 21:41:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 595. [2019-10-13 21:41:07,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2019-10-13 21:41:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1031 transitions. [2019-10-13 21:41:07,509 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1031 transitions. Word has length 100 [2019-10-13 21:41:07,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:07,509 INFO L462 AbstractCegarLoop]: Abstraction has 595 states and 1031 transitions. [2019-10-13 21:41:07,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:41:07,510 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1031 transitions. [2019-10-13 21:41:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 21:41:07,514 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:07,515 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:07,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:07,720 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:07,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:07,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1307299681, now seen corresponding path program 1 times [2019-10-13 21:41:07,721 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:07,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36049078] [2019-10-13 21:41:07,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:07,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:07,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:07,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36049078] [2019-10-13 21:41:07,854 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:41:07,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:41:07,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974552203] [2019-10-13 21:41:07,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:41:07,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:41:07,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:41:07,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:41:07,857 INFO L87 Difference]: Start difference. First operand 595 states and 1031 transitions. Second operand 6 states. [2019-10-13 21:41:08,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:41:08,525 INFO L93 Difference]: Finished difference Result 1223 states and 2179 transitions. [2019-10-13 21:41:08,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:41:08,525 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2019-10-13 21:41:08,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:41:08,532 INFO L225 Difference]: With dead ends: 1223 [2019-10-13 21:41:08,532 INFO L226 Difference]: Without dead ends: 633 [2019-10-13 21:41:08,535 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-13 21:41:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-13 21:41:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 449. [2019-10-13 21:41:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 449 states. [2019-10-13 21:41:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 737 transitions. [2019-10-13 21:41:08,563 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 737 transitions. Word has length 108 [2019-10-13 21:41:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:41:08,564 INFO L462 AbstractCegarLoop]: Abstraction has 449 states and 737 transitions. [2019-10-13 21:41:08,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:41:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 737 transitions. [2019-10-13 21:41:08,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 21:41:08,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:41:08,567 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:41:08,567 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:41:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:41:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1860594020, now seen corresponding path program 1 times [2019-10-13 21:41:08,568 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:41:08,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335544963] [2019-10-13 21:41:08,568 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:08,569 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:41:08,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:41:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:08,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335544963] [2019-10-13 21:41:08,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570504686] [2019-10-13 21:41:08,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:08,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:41:08,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:41:08,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:41:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:08,852 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:41:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:41:08,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [118972878] [2019-10-13 21:41:08,969 INFO L162 IcfgInterpreter]: Started Sifa with 90 locations of interest [2019-10-13 21:41:08,970 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:41:08,976 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:41:08,985 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:41:08,986 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:41:09,251 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 87 for LOIs [2019-10-13 21:41:09,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:41:09,760 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:184) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarizeInternal(FixpointLoopSummarizer.java:118) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:178) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:169) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:299) ... 21 more [2019-10-13 21:41:09,767 INFO L168 Benchmark]: Toolchain (without parser) took 8344.17 ms. Allocated memory was 139.5 MB in the beginning and 324.0 MB in the end (delta: 184.5 MB). Free memory was 101.5 MB in the beginning and 117.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 168.2 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:09,768 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:41:09,771 INFO L168 Benchmark]: CACSL2BoogieTranslator took 763.35 ms. Allocated memory was 139.5 MB in the beginning and 206.0 MB in the end (delta: 66.6 MB). Free memory was 101.3 MB in the beginning and 171.8 MB in the end (delta: -70.5 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:09,773 INFO L168 Benchmark]: Boogie Preprocessor took 117.99 ms. Allocated memory is still 206.0 MB. Free memory was 171.8 MB in the beginning and 167.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:09,776 INFO L168 Benchmark]: RCFGBuilder took 2103.94 ms. Allocated memory was 206.0 MB in the beginning and 248.0 MB in the end (delta: 41.9 MB). Free memory was 167.1 MB in the beginning and 193.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 112.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:09,779 INFO L168 Benchmark]: TraceAbstraction took 5353.59 ms. Allocated memory was 248.0 MB in the beginning and 324.0 MB in the end (delta: 76.0 MB). Free memory was 193.9 MB in the beginning and 117.9 MB in the end (delta: 76.1 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:41:09,786 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 763.35 ms. Allocated memory was 139.5 MB in the beginning and 206.0 MB in the end (delta: 66.6 MB). Free memory was 101.3 MB in the beginning and 171.8 MB in the end (delta: -70.5 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.99 ms. Allocated memory is still 206.0 MB. Free memory was 171.8 MB in the beginning and 167.1 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2103.94 ms. Allocated memory was 206.0 MB in the beginning and 248.0 MB in the end (delta: 41.9 MB). Free memory was 167.1 MB in the beginning and 193.9 MB in the end (delta: -26.9 MB). Peak memory consumption was 112.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5353.59 ms. Allocated memory was 248.0 MB in the beginning and 324.0 MB in the end (delta: 76.0 MB). Free memory was 193.9 MB in the beginning and 117.9 MB in the end (delta: 76.1 MB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true; de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: assume true;: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:307) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...