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/Problem16_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:53:41,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:53:41,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:53:41,455 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:53:41,455 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:53:41,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:53:41,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:53:41,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:53:41,476 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:53:41,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:53:41,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:53:41,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:53:41,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:53:41,484 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:53:41,486 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:53:41,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:53:41,490 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:53:41,491 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:53:41,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:53:41,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:53:41,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:53:41,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:53:41,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:53:41,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:53:41,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:53:41,524 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:53:41,525 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:53:41,527 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:53:41,528 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 21:53:41,560 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:53:41,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:53:41,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:53:41,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:53:41,563 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:53:41,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:53:41,564 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:53:41,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:53:41,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:53:41,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:53:41,565 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:53:41,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:53:41,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:53:41,567 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:53:41,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:53:41,567 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:53:41,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:53:41,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:53:41,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:53:41,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:53:41,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:53:41,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:53:41,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:53:41,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:53:41,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:53:41,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:53:41,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:53:41,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:53:41,571 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 21:53:41,930 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:53:41,950 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:53:41,954 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:53:41,957 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:53:41,958 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:53:41,959 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-10-13 21:53:42,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cd70acd/cdec113643ee4c97aa6e19ac8be8459d/FLAG9994d543a [2019-10-13 21:53:42,717 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:53:42,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-10-13 21:53:42,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cd70acd/cdec113643ee4c97aa6e19ac8be8459d/FLAG9994d543a [2019-10-13 21:53:42,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/31cd70acd/cdec113643ee4c97aa6e19ac8be8459d [2019-10-13 21:53:42,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:53:42,874 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:53:42,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:53:42,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:53:42,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:53:42,884 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:53:42" (1/1) ... [2019-10-13 21:53:42,887 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76e884bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:42, skipping insertion in model container [2019-10-13 21:53:42,887 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:53:42" (1/1) ... [2019-10-13 21:53:42,896 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:53:42,975 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:53:43,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:53:43,866 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:53:44,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:53:44,186 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:53:44,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44 WrapperNode [2019-10-13 21:53:44,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:53:44,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:53:44,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:53:44,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:53:44,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,332 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (1/1) ... [2019-10-13 21:53:44,368 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:53:44,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:53:44,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:53:44,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:53:44,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (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 21:53:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:53:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:53:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 21:53:44,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 21:53:44,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:53:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 21:53:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 21:53:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:53:44,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:53:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 21:53:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:53:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:53:44,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:54:00,506 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:54:00,507 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 21:54:00,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:00 BoogieIcfgContainer [2019-10-13 21:54:00,509 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:54:00,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:54:00,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:54:00,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:54:00,517 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:53:42" (1/3) ... [2019-10-13 21:54:00,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4548b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:00, skipping insertion in model container [2019-10-13 21:54:00,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:53:44" (2/3) ... [2019-10-13 21:54:00,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4548b5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:54:00, skipping insertion in model container [2019-10-13 21:54:00,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:54:00" (3/3) ... [2019-10-13 21:54:00,521 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2019-10-13 21:54:00,534 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:54:00,544 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:54:00,556 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:54:00,598 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:54:00,598 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:54:00,599 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:54:00,599 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:54:00,599 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:54:00,600 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:54:00,600 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:54:00,600 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:54:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-13 21:54:00,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 21:54:00,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:00,639 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:00,641 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:00,647 INFO L82 PathProgramCache]: Analyzing trace with hash 863561535, now seen corresponding path program 1 times [2019-10-13 21:54:00,656 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:00,657 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262043452] [2019-10-13 21:54:00,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:00,657 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:00,657 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:00,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:00,941 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 21:54:00,941 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262043452] [2019-10-13 21:54:00,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:00,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:54:00,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092423143] [2019-10-13 21:54:00,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:54:00,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:00,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:54:00,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:00,966 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-13 21:54:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:02,780 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-13 21:54:02,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:54:02,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-13 21:54:02,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:02,800 INFO L225 Difference]: With dead ends: 718 [2019-10-13 21:54:02,801 INFO L226 Difference]: Without dead ends: 471 [2019-10-13 21:54:02,809 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:54:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-13 21:54:02,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 455. [2019-10-13 21:54:02,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 455 states. [2019-10-13 21:54:02,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 857 transitions. [2019-10-13 21:54:02,897 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 857 transitions. Word has length 11 [2019-10-13 21:54:02,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:02,898 INFO L462 AbstractCegarLoop]: Abstraction has 455 states and 857 transitions. [2019-10-13 21:54:02,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:54:02,898 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 857 transitions. [2019-10-13 21:54:02,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 21:54:02,900 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:02,900 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 21:54:02,901 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:02,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:02,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1525267509, now seen corresponding path program 1 times [2019-10-13 21:54:02,901 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:02,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002935334] [2019-10-13 21:54:02,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:02,902 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:02,902 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:02,994 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 21:54:02,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002935334] [2019-10-13 21:54:02,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:02,997 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 21:54:02,997 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56944271] [2019-10-13 21:54:02,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:02,999 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:02,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:02,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 21:54:03,000 INFO L87 Difference]: Start difference. First operand 455 states and 857 transitions. Second operand 5 states. [2019-10-13 21:54:05,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:05,627 INFO L93 Difference]: Finished difference Result 1369 states and 2614 transitions. [2019-10-13 21:54:05,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:05,633 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-13 21:54:05,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:05,640 INFO L225 Difference]: With dead ends: 1369 [2019-10-13 21:54:05,640 INFO L226 Difference]: Without dead ends: 919 [2019-10-13 21:54:05,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 21:54:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2019-10-13 21:54:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 879. [2019-10-13 21:54:05,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2019-10-13 21:54:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1570 transitions. [2019-10-13 21:54:05,712 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1570 transitions. Word has length 21 [2019-10-13 21:54:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:05,713 INFO L462 AbstractCegarLoop]: Abstraction has 879 states and 1570 transitions. [2019-10-13 21:54:05,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1570 transitions. [2019-10-13 21:54:05,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 21:54:05,715 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:05,715 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] [2019-10-13 21:54:05,715 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash -781263902, now seen corresponding path program 1 times [2019-10-13 21:54:05,716 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:05,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697367479] [2019-10-13 21:54:05,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:05,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:05,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:05,909 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 21:54:05,909 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697367479] [2019-10-13 21:54:05,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:54:05,910 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 21:54:05,910 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386292738] [2019-10-13 21:54:05,910 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:54:05,911 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:05,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:54:05,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:54:05,911 INFO L87 Difference]: Start difference. First operand 879 states and 1570 transitions. Second operand 6 states. [2019-10-13 21:54:08,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:08,043 INFO L93 Difference]: Finished difference Result 2455 states and 4487 transitions. [2019-10-13 21:54:08,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 21:54:08,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 50 [2019-10-13 21:54:08,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:08,064 INFO L225 Difference]: With dead ends: 2455 [2019-10-13 21:54:08,076 INFO L226 Difference]: Without dead ends: 1581 [2019-10-13 21:54:08,081 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 21:54:08,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2019-10-13 21:54:08,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1560. [2019-10-13 21:54:08,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1560 states. [2019-10-13 21:54:08,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 2706 transitions. [2019-10-13 21:54:08,151 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 2706 transitions. Word has length 50 [2019-10-13 21:54:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:08,152 INFO L462 AbstractCegarLoop]: Abstraction has 1560 states and 2706 transitions. [2019-10-13 21:54:08,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:54:08,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 2706 transitions. [2019-10-13 21:54:08,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 21:54:08,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:08,156 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:54:08,156 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:08,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:08,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1243057397, now seen corresponding path program 1 times [2019-10-13 21:54:08,157 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:08,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711563694] [2019-10-13 21:54:08,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:08,158 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:08,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:08,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711563694] [2019-10-13 21:54:08,323 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868326008] [2019-10-13 21:54:08,323 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 21:54:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:08,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:08,431 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:08,508 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:08,580 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:08,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:08,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:08,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969481996] [2019-10-13 21:54:08,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:08,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:08,583 INFO L87 Difference]: Start difference. First operand 1560 states and 2706 transitions. Second operand 5 states. [2019-10-13 21:54:10,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:10,755 INFO L93 Difference]: Finished difference Result 3811 states and 6632 transitions. [2019-10-13 21:54:10,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 21:54:10,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2019-10-13 21:54:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:10,774 INFO L225 Difference]: With dead ends: 3811 [2019-10-13 21:54:10,774 INFO L226 Difference]: Without dead ends: 2256 [2019-10-13 21:54:10,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2019-10-13 21:54:10,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2019-10-13 21:54:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 2222. [2019-10-13 21:54:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2222 states. [2019-10-13 21:54:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2222 states to 2222 states and 3220 transitions. [2019-10-13 21:54:10,856 INFO L78 Accepts]: Start accepts. Automaton has 2222 states and 3220 transitions. Word has length 63 [2019-10-13 21:54:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:10,857 INFO L462 AbstractCegarLoop]: Abstraction has 2222 states and 3220 transitions. [2019-10-13 21:54:10,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:10,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2222 states and 3220 transitions. [2019-10-13 21:54:10,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 21:54:10,861 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:10,861 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-13 21:54:11,069 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:11,069 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -746141361, now seen corresponding path program 1 times [2019-10-13 21:54:11,071 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:11,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462315594] [2019-10-13 21:54:11,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:11,072 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:11,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:11,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462315594] [2019-10-13 21:54:11,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163618219] [2019-10-13 21:54:11,180 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 21:54:11,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:11,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 21:54:11,291 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:11,333 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 21:54:11,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 21:54:11,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 21:54:11,406 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412976263] [2019-10-13 21:54:11,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 21:54:11,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:54:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 21:54:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 21:54:11,407 INFO L87 Difference]: Start difference. First operand 2222 states and 3220 transitions. Second operand 5 states. [2019-10-13 21:54:13,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:54:13,976 INFO L93 Difference]: Finished difference Result 5177 states and 7563 transitions. [2019-10-13 21:54:13,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 21:54:13,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2019-10-13 21:54:13,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:54:13,996 INFO L225 Difference]: With dead ends: 5177 [2019-10-13 21:54:13,996 INFO L226 Difference]: Without dead ends: 2960 [2019-10-13 21:54:14,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 21:54:14,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2960 states. [2019-10-13 21:54:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2960 to 2907. [2019-10-13 21:54:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2907 states. [2019-10-13 21:54:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4097 transitions. [2019-10-13 21:54:14,093 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4097 transitions. Word has length 85 [2019-10-13 21:54:14,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:54:14,095 INFO L462 AbstractCegarLoop]: Abstraction has 2907 states and 4097 transitions. [2019-10-13 21:54:14,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 21:54:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4097 transitions. [2019-10-13 21:54:14,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-13 21:54:14,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:54:14,101 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:14,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:14,309 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:54:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:54:14,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1805025969, now seen corresponding path program 1 times [2019-10-13 21:54:14,310 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:54:14,310 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018485074] [2019-10-13 21:54:14,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:14,310 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:54:14,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:54:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:54:14,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018485074] [2019-10-13 21:54:14,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487591730] [2019-10-13 21:54:14,469 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 21:54:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:54:14,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 21:54:14,595 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:54:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-13 21:54:14,650 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:54:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-10-13 21:54:14,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483897585] [2019-10-13 21:54:14,751 INFO L162 IcfgInterpreter]: Started Sifa with 64 locations of interest [2019-10-13 21:54:14,751 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:54:14,758 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:54:14,765 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:54:14,765 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:54:14,918 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 55 for LOIs [2019-10-13 21:54:15,015 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2019-10-13 21:54:15,197 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 28 [2019-10-13 21:54:15,427 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2019-10-13 21:54:15,600 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 33 [2019-10-13 21:54:15,949 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:54:15,950 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 21:54:15,958 INFO L168 Benchmark]: Toolchain (without parser) took 33084.97 ms. Allocated memory was 143.7 MB in the beginning and 558.9 MB in the end (delta: 415.2 MB). Free memory was 96.8 MB in the beginning and 328.4 MB in the end (delta: -231.6 MB). Peak memory consumption was 183.6 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:15,959 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.7 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 21:54:15,960 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1308.54 ms. Allocated memory was 143.7 MB in the beginning and 203.9 MB in the end (delta: 60.3 MB). Free memory was 96.5 MB in the beginning and 126.0 MB in the end (delta: -29.4 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:15,961 INFO L168 Benchmark]: Boogie Preprocessor took 180.78 ms. Allocated memory is still 203.9 MB. Free memory was 126.0 MB in the beginning and 115.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:15,962 INFO L168 Benchmark]: RCFGBuilder took 16139.85 ms. Allocated memory was 203.9 MB in the beginning and 307.2 MB in the end (delta: 103.3 MB). Free memory was 115.5 MB in the beginning and 132.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 146.9 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:15,963 INFO L168 Benchmark]: TraceAbstraction took 15445.20 ms. Allocated memory was 307.2 MB in the beginning and 558.9 MB in the end (delta: 251.7 MB). Free memory was 132.1 MB in the beginning and 328.4 MB in the end (delta: -196.3 MB). Peak memory consumption was 55.4 MB. Max. memory is 7.1 GB. [2019-10-13 21:54:15,968 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 143.7 MB. Free memory was 120.0 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1308.54 ms. Allocated memory was 143.7 MB in the beginning and 203.9 MB in the end (delta: 60.3 MB). Free memory was 96.5 MB in the beginning and 126.0 MB in the end (delta: -29.4 MB). Peak memory consumption was 39.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 180.78 ms. Allocated memory is still 203.9 MB. Free memory was 126.0 MB in the beginning and 115.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 16139.85 ms. Allocated memory was 203.9 MB in the beginning and 307.2 MB in the end (delta: 103.3 MB). Free memory was 115.5 MB in the beginning and 132.1 MB in the end (delta: -16.6 MB). Peak memory consumption was 146.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 15445.20 ms. Allocated memory was 307.2 MB in the beginning and 558.9 MB in the end (delta: 251.7 MB). Free memory was 132.1 MB in the beginning and 328.4 MB in the end (delta: -196.3 MB). Peak memory consumption was 55.4 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...