java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:52:07,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:52:07,024 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:52:07,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:52:07,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:52:07,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:52:07,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:52:07,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:52:07,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:52:07,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:52:07,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:52:07,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:52:07,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:52:07,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:52:07,047 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:52:07,048 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:52:07,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:52:07,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:52:07,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:52:07,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:52:07,055 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:52:07,056 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:52:07,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:52:07,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:52:07,062 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:52:07,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:52:07,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:52:07,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:52:07,072 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 21:52:07,086 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:52:07,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:52:07,088 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:52:07,088 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:52:07,088 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:52:07,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:52:07,089 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:52:07,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:52:07,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:52:07,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:52:07,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:52:07,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:52:07,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:52:07,090 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:52:07,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:52:07,091 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:52:07,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:52:07,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:52:07,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:52:07,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:52:07,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:52:07,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:52:07,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:52:07,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:52:07,093 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:52:07,093 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:52:07,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:52:07,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:52:07,093 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 21:52:07,382 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:52:07,397 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:52:07,401 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:52:07,402 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:52:07,402 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:52:07,403 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-13 21:52:07,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d937c682/eb8928ceb6a443d4a2d8a2cc3a961790/FLAG87aa1bcdb [2019-10-13 21:52:08,147 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:52:08,148 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label03.c [2019-10-13 21:52:08,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d937c682/eb8928ceb6a443d4a2d8a2cc3a961790/FLAG87aa1bcdb [2019-10-13 21:52:08,295 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d937c682/eb8928ceb6a443d4a2d8a2cc3a961790 [2019-10-13 21:52:08,306 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:52:08,307 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:52:08,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:52:08,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:52:08,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:52:08,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:52:08" (1/1) ... [2019-10-13 21:52:08,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ef64dac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:08, skipping insertion in model container [2019-10-13 21:52:08,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:52:08" (1/1) ... [2019-10-13 21:52:08,324 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:52:08,414 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:52:09,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:52:09,280 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:52:09,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:52:09,550 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:52:09,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09 WrapperNode [2019-10-13 21:52:09,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:52:09,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:52:09,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:52:09,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:52:09,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,601 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,602 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,691 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (1/1) ... [2019-10-13 21:52:09,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:52:09,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:52:09,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:52:09,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:52:09,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (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 21:52:09,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:52:09,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:52:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:52:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:52:09,832 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:52:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:52:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:52:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:52:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:52:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:52:09,834 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:52:09,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:52:09,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:52:19,487 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:52:19,490 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:52:19,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:52:19 BoogieIcfgContainer [2019-10-13 21:52:19,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:52:19,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:52:19,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:52:19,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:52:19,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:52:08" (1/3) ... [2019-10-13 21:52:19,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78120cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:52:19, skipping insertion in model container [2019-10-13 21:52:19,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:52:09" (2/3) ... [2019-10-13 21:52:19,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78120cb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:52:19, skipping insertion in model container [2019-10-13 21:52:19,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:52:19" (3/3) ... [2019-10-13 21:52:19,509 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label03.c [2019-10-13 21:52:19,520 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:52:19,531 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:52:19,542 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:52:19,576 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:52:19,576 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:52:19,576 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:52:19,577 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:52:19,577 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:52:19,577 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:52:19,577 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:52:19,577 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:52:19,606 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:52:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:52:19,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:52:19,616 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:52:19,618 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:52:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:52:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 648045165, now seen corresponding path program 1 times [2019-10-13 21:52:19,633 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:52:19,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505694485] [2019-10-13 21:52:19,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:19,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:19,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:52:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:19,874 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 21:52:19,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505694485] [2019-10-13 21:52:19,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:52:19,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:52:19,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561602958] [2019-10-13 21:52:19,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:52:19,881 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:52:19,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:52:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:52:19,899 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 4 states. [2019-10-13 21:52:25,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:52:25,759 INFO L93 Difference]: Finished difference Result 953 states and 1852 transitions. [2019-10-13 21:52:25,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:52:25,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-13 21:52:25,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:52:25,787 INFO L225 Difference]: With dead ends: 953 [2019-10-13 21:52:25,787 INFO L226 Difference]: Without dead ends: 702 [2019-10-13 21:52:25,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:52:25,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2019-10-13 21:52:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 430. [2019-10-13 21:52:25,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2019-10-13 21:52:25,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 821 transitions. [2019-10-13 21:52:25,890 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 821 transitions. Word has length 11 [2019-10-13 21:52:25,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:52:25,891 INFO L462 AbstractCegarLoop]: Abstraction has 430 states and 821 transitions. [2019-10-13 21:52:25,891 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:52:25,891 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 821 transitions. [2019-10-13 21:52:25,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 21:52:25,893 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:52:25,894 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:52:25,894 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:52:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:52:25,894 INFO L82 PathProgramCache]: Analyzing trace with hash 507900312, now seen corresponding path program 1 times [2019-10-13 21:52:25,895 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:52:25,895 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325236543] [2019-10-13 21:52:25,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:25,895 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:25,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:52:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:26,011 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 21:52:26,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325236543] [2019-10-13 21:52:26,011 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:52:26,012 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:52:26,012 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798347519] [2019-10-13 21:52:26,014 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:52:26,014 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:52:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:52:26,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:52:26,015 INFO L87 Difference]: Start difference. First operand 430 states and 821 transitions. Second operand 4 states. [2019-10-13 21:52:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:52:29,383 INFO L93 Difference]: Finished difference Result 1699 states and 3298 transitions. [2019-10-13 21:52:29,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:52:29,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-10-13 21:52:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:52:29,395 INFO L225 Difference]: With dead ends: 1699 [2019-10-13 21:52:29,395 INFO L226 Difference]: Without dead ends: 1274 [2019-10-13 21:52:29,398 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:52:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2019-10-13 21:52:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1243. [2019-10-13 21:52:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1243 states. [2019-10-13 21:52:29,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 2082 transitions. [2019-10-13 21:52:29,460 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 2082 transitions. Word has length 21 [2019-10-13 21:52:29,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:52:29,460 INFO L462 AbstractCegarLoop]: Abstraction has 1243 states and 2082 transitions. [2019-10-13 21:52:29,460 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:52:29,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 2082 transitions. [2019-10-13 21:52:29,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 21:52:29,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:52:29,465 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:52:29,465 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:52:29,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:52:29,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1904499010, now seen corresponding path program 1 times [2019-10-13 21:52:29,466 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:52:29,466 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133619550] [2019-10-13 21:52:29,466 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:29,467 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:29,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:52:29,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:52:29,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133619550] [2019-10-13 21:52:29,604 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169731769] [2019-10-13 21:52:29,604 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 21:52:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:29,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:52:29,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:52:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:52:29,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:52:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:52:29,923 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:52:29,924 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2019-10-13 21:52:29,924 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427021658] [2019-10-13 21:52:29,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:52:29,925 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:52:29,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:52:29,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:52:29,925 INFO L87 Difference]: Start difference. First operand 1243 states and 2082 transitions. Second operand 5 states. [2019-10-13 21:52:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:52:34,826 INFO L93 Difference]: Finished difference Result 3377 states and 5740 transitions. [2019-10-13 21:52:34,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:52:34,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2019-10-13 21:52:34,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:52:34,847 INFO L225 Difference]: With dead ends: 3377 [2019-10-13 21:52:34,848 INFO L226 Difference]: Without dead ends: 2139 [2019-10-13 21:52:34,852 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:52:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2019-10-13 21:52:34,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2104. [2019-10-13 21:52:34,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2104 states. [2019-10-13 21:52:34,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 3355 transitions. [2019-10-13 21:52:34,947 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 3355 transitions. Word has length 62 [2019-10-13 21:52:34,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:52:34,947 INFO L462 AbstractCegarLoop]: Abstraction has 2104 states and 3355 transitions. [2019-10-13 21:52:34,948 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:52:34,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 3355 transitions. [2019-10-13 21:52:34,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 21:52:34,964 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:52:34,964 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:52:35,168 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:52:35,169 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:52:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:52:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 549190598, now seen corresponding path program 1 times [2019-10-13 21:52:35,169 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:52:35,170 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638565263] [2019-10-13 21:52:35,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:35,170 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:35,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:52:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:52:35,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638565263] [2019-10-13 21:52:35,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36965053] [2019-10-13 21:52:35,347 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 21:52:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:35,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:52:35,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:52:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:52:35,506 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:52:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:52:35,582 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:52:35,583 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-13 21:52:35,583 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353468215] [2019-10-13 21:52:35,584 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:52:35,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:52:35,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:52:35,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-10-13 21:52:35,585 INFO L87 Difference]: Start difference. First operand 2104 states and 3355 transitions. Second operand 5 states. [2019-10-13 21:52:39,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:52:39,582 INFO L93 Difference]: Finished difference Result 6206 states and 10355 transitions. [2019-10-13 21:52:39,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:52:39,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2019-10-13 21:52:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:52:39,605 INFO L225 Difference]: With dead ends: 6206 [2019-10-13 21:52:39,605 INFO L226 Difference]: Without dead ends: 4107 [2019-10-13 21:52:39,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 21:52:39,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2019-10-13 21:52:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 2747. [2019-10-13 21:52:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2747 states. [2019-10-13 21:52:39,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 4221 transitions. [2019-10-13 21:52:39,718 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 4221 transitions. Word has length 66 [2019-10-13 21:52:39,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:52:39,718 INFO L462 AbstractCegarLoop]: Abstraction has 2747 states and 4221 transitions. [2019-10-13 21:52:39,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:52:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 4221 transitions. [2019-10-13 21:52:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-13 21:52:39,721 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:52:39,721 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:52:39,933 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:52:39,933 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:52:39,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:52:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2018364511, now seen corresponding path program 1 times [2019-10-13 21:52:39,933 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:52:39,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106680023] [2019-10-13 21:52:39,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:39,934 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:52:39,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:52:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:52:40,184 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106680023] [2019-10-13 21:52:40,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594566190] [2019-10-13 21:52:40,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:52:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:52:40,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:52:40,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:52:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:52:40,375 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:52:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:52:40,516 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1357143724] [2019-10-13 21:52:40,555 INFO L162 IcfgInterpreter]: Started Sifa with 148 locations of interest [2019-10-13 21:52:40,555 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:52:40,563 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:52:40,570 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:52:40,571 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:52:40,718 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 58 for LOIs [2019-10-13 21:52:40,993 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-13 21:52:41,137 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 17 [2019-10-13 21:52:41,283 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2019-10-13 21:52:41,960 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10179 conjuctions. This might take some time... [2019-10-13 21:52:42,259 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 44 [2019-10-13 21:52:42,530 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 10179 conjuctions. This might take some time... [2019-10-13 21:52:42,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:52:42,979 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 21:52:42,987 INFO L168 Benchmark]: Toolchain (without parser) took 34679.06 ms. Allocated memory was 137.4 MB in the beginning and 555.7 MB in the end (delta: 418.4 MB). Free memory was 97.4 MB in the beginning and 132.3 MB in the end (delta: -34.9 MB). Peak memory consumption was 383.5 MB. Max. memory is 7.1 GB. [2019-10-13 21:52:42,988 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:52:42,989 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1243.06 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 97.2 MB in the beginning and 170.9 MB in the end (delta: -73.7 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:52:42,990 INFO L168 Benchmark]: Boogie Preprocessor took 207.14 ms. Allocated memory is still 232.3 MB. Free memory was 170.9 MB in the beginning and 158.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-10-13 21:52:42,991 INFO L168 Benchmark]: RCFGBuilder took 9735.02 ms. Allocated memory was 232.3 MB in the beginning and 334.0 MB in the end (delta: 101.7 MB). Free memory was 158.8 MB in the beginning and 285.3 MB in the end (delta: -126.5 MB). Peak memory consumption was 180.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:52:42,992 INFO L168 Benchmark]: TraceAbstraction took 23486.33 ms. Allocated memory was 334.0 MB in the beginning and 555.7 MB in the end (delta: 221.8 MB). Free memory was 285.3 MB in the beginning and 132.3 MB in the end (delta: 153.0 MB). Peak memory consumption was 374.8 MB. Max. memory is 7.1 GB. [2019-10-13 21:52:43,001 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory was 120.6 MB in the beginning and 120.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1243.06 ms. Allocated memory was 137.4 MB in the beginning and 232.3 MB in the end (delta: 94.9 MB). Free memory was 97.2 MB in the beginning and 170.9 MB in the end (delta: -73.7 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.14 ms. Allocated memory is still 232.3 MB. Free memory was 170.9 MB in the beginning and 158.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 9735.02 ms. Allocated memory was 232.3 MB in the beginning and 334.0 MB in the end (delta: 101.7 MB). Free memory was 158.8 MB in the beginning and 285.3 MB in the end (delta: -126.5 MB). Peak memory consumption was 180.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23486.33 ms. Allocated memory was 334.0 MB in the beginning and 555.7 MB in the end (delta: 221.8 MB). Free memory was 285.3 MB in the beginning and 132.3 MB in the end (delta: 153.0 MB). Peak memory consumption was 374.8 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...