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/Problem01_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 00:56:00,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 00:56:00,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 00:56:00,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 00:56:00,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 00:56:00,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 00:56:00,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 00:56:00,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 00:56:00,545 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 00:56:00,545 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 00:56:00,547 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 00:56:00,549 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 00:56:00,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 00:56:00,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 00:56:00,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 00:56:00,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 00:56:00,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 00:56:00,560 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 00:56:00,562 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 00:56:00,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 00:56:00,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 00:56:00,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 00:56:00,575 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 00:56:00,576 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 00:56:00,578 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 00:56:00,578 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 00:56:00,578 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 00:56:00,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 00:56:00,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 00:56:00,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 00:56:00,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 00:56:00,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 00:56:00,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 00:56:00,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 00:56:00,587 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 00:56:00,587 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 00:56:00,589 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 00:56:00,589 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 00:56:00,589 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 00:56:00,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 00:56:00,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 00:56:00,595 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 [2019-10-07 00:56:00,629 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 00:56:00,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 00:56:00,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 00:56:00,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 00:56:00,634 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 00:56:00,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 00:56:00,635 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 00:56:00,635 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 00:56:00,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 00:56:00,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 00:56:00,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 00:56:00,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 00:56:00,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 00:56:00,638 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 00:56:00,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 00:56:00,639 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 00:56:00,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 00:56:00,640 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 00:56:00,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 00:56:00,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 00:56:00,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 00:56:00,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:56:00,641 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 00:56:00,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 00:56:00,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 00:56:00,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 00:56:00,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 00:56:00,642 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 00:56:00,642 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 [2019-10-07 00:56:00,919 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 00:56:00,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 00:56:00,937 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 00:56:00,938 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 00:56:00,938 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 00:56:00,939 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-07 00:56:01,000 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7dc74546/28ffab38a2f649cf802bb6617ce00f07/FLAG37af5b21a [2019-10-07 00:56:01,610 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 00:56:01,611 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label25.c [2019-10-07 00:56:01,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7dc74546/28ffab38a2f649cf802bb6617ce00f07/FLAG37af5b21a [2019-10-07 00:56:01,864 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7dc74546/28ffab38a2f649cf802bb6617ce00f07 [2019-10-07 00:56:01,874 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 00:56:01,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 00:56:01,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 00:56:01,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 00:56:01,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 00:56:01,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:56:01" (1/1) ... [2019-10-07 00:56:01,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f8ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:01, skipping insertion in model container [2019-10-07 00:56:01,885 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 12:56:01" (1/1) ... [2019-10-07 00:56:01,893 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 00:56:01,959 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 00:56:02,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:56:02,479 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 00:56:02,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 00:56:02,631 INFO L192 MainTranslator]: Completed translation [2019-10-07 00:56:02,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02 WrapperNode [2019-10-07 00:56:02,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 00:56:02,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 00:56:02,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 00:56:02,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 00:56:02,648 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,741 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... [2019-10-07 00:56:02,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 00:56:02,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 00:56:02,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 00:56:02,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 00:56:02,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 00:56:02,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 00:56:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 00:56:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-07 00:56:02,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 00:56:02,805 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-07 00:56:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 00:56:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 00:56:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-07 00:56:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 00:56:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 00:56:02,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 00:56:04,637 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 00:56:04,637 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-07 00:56:04,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:56:04 BoogieIcfgContainer [2019-10-07 00:56:04,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 00:56:04,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 00:56:04,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 00:56:04,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 00:56:04,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 12:56:01" (1/3) ... [2019-10-07 00:56:04,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e134bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:56:04, skipping insertion in model container [2019-10-07 00:56:04,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 12:56:02" (2/3) ... [2019-10-07 00:56:04,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49e134bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 12:56:04, skipping insertion in model container [2019-10-07 00:56:04,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 12:56:04" (3/3) ... [2019-10-07 00:56:04,649 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label25.c [2019-10-07 00:56:04,663 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 00:56:04,673 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 00:56:04,685 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 00:56:04,715 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 00:56:04,716 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 00:56:04,716 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 00:56:04,716 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 00:56:04,717 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 00:56:04,717 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 00:56:04,718 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 00:56:04,718 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 00:56:04,745 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states. [2019-10-07 00:56:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-07 00:56:04,753 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:56:04,754 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:56:04,756 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:56:04,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:56:04,761 INFO L82 PathProgramCache]: Analyzing trace with hash 826823268, now seen corresponding path program 1 times [2019-10-07 00:56:04,768 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:56:04,768 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:04,769 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:04,769 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:56:04,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:05,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:05,245 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:05,246 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:56:05,246 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 00:56:05,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:56:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:56:05,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:56:05,269 INFO L87 Difference]: Start difference. First operand 86 states. Second operand 3 states. [2019-10-07 00:56:05,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:56:05,873 INFO L93 Difference]: Finished difference Result 246 states and 454 transitions. [2019-10-07 00:56:05,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:56:05,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2019-10-07 00:56:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:56:05,903 INFO L225 Difference]: With dead ends: 246 [2019-10-07 00:56:05,903 INFO L226 Difference]: Without dead ends: 157 [2019-10-07 00:56:05,937 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 00:56:05,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-10-07 00:56:06,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2019-10-07 00:56:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-07 00:56:06,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 285 transitions. [2019-10-07 00:56:06,051 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 285 transitions. Word has length 77 [2019-10-07 00:56:06,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:56:06,053 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 285 transitions. [2019-10-07 00:56:06,053 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:56:06,053 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 285 transitions. [2019-10-07 00:56:06,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-07 00:56:06,062 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:56:06,062 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 00:56:06,063 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:56:06,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:56:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1022492965, now seen corresponding path program 1 times [2019-10-07 00:56:06,064 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:56:06,065 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:06,065 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:06,065 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:06,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:56:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:06,256 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:06,257 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:56:06,257 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 00:56:06,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 00:56:06,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 00:56:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 00:56:06,261 INFO L87 Difference]: Start difference. First operand 157 states and 285 transitions. Second operand 5 states. [2019-10-07 00:56:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:56:06,857 INFO L93 Difference]: Finished difference Result 479 states and 892 transitions. [2019-10-07 00:56:06,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:56:06,858 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2019-10-07 00:56:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:56:06,864 INFO L225 Difference]: With dead ends: 479 [2019-10-07 00:56:06,864 INFO L226 Difference]: Without dead ends: 327 [2019-10-07 00:56:06,866 INFO L606 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 [2019-10-07 00:56:06,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2019-10-07 00:56:06,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 317. [2019-10-07 00:56:06,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2019-10-07 00:56:06,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 547 transitions. [2019-10-07 00:56:06,904 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 547 transitions. Word has length 86 [2019-10-07 00:56:06,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:56:06,905 INFO L462 AbstractCegarLoop]: Abstraction has 317 states and 547 transitions. [2019-10-07 00:56:06,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 00:56:06,905 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 547 transitions. [2019-10-07 00:56:06,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-07 00:56:06,913 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:56:06,914 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:56:06,914 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:56:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:56:06,915 INFO L82 PathProgramCache]: Analyzing trace with hash -311199160, now seen corresponding path program 1 times [2019-10-07 00:56:06,916 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:56:06,916 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:06,916 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:06,916 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:56:06,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:07,065 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:07,065 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:07,066 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:56:07,067 INFO L95 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 [2019-10-07 00:56:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:07,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:56:07,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:56:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:56:07,265 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:56:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-07 00:56:07,359 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 00:56:07,359 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-07 00:56:07,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:56:07,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:56:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-07 00:56:07,360 INFO L87 Difference]: Start difference. First operand 317 states and 547 transitions. Second operand 3 states. [2019-10-07 00:56:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:56:07,817 INFO L93 Difference]: Finished difference Result 860 states and 1512 transitions. [2019-10-07 00:56:07,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:56:07,818 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 97 [2019-10-07 00:56:07,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:56:07,824 INFO L225 Difference]: With dead ends: 860 [2019-10-07 00:56:07,824 INFO L226 Difference]: Without dead ends: 548 [2019-10-07 00:56:07,828 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 192 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-07 00:56:07,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-07 00:56:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2019-10-07 00:56:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 548 states. [2019-10-07 00:56:07,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 908 transitions. [2019-10-07 00:56:07,872 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 908 transitions. Word has length 97 [2019-10-07 00:56:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:56:07,873 INFO L462 AbstractCegarLoop]: Abstraction has 548 states and 908 transitions. [2019-10-07 00:56:07,873 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:56:07,873 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 908 transitions. [2019-10-07 00:56:07,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 00:56:07,877 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:56:07,877 INFO L385 BasicCegarLoop]: trace histogram [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] [2019-10-07 00:56:08,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:56:08,084 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:56:08,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:56:08,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1630248519, now seen corresponding path program 1 times [2019-10-07 00:56:08,085 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:56:08,086 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:08,086 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:08,086 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:56:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:08,316 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:08,317 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:56:08,317 INFO L95 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 [2019-10-07 00:56:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:08,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:56:08,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:56:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:08,466 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:56:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:08,508 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 00:56:08,509 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-07 00:56:08,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 00:56:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 00:56:08,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-07 00:56:08,510 INFO L87 Difference]: Start difference. First operand 548 states and 908 transitions. Second operand 3 states. [2019-10-07 00:56:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:56:08,980 INFO L93 Difference]: Finished difference Result 1626 states and 2793 transitions. [2019-10-07 00:56:08,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 00:56:08,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 96 [2019-10-07 00:56:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:56:08,990 INFO L225 Difference]: With dead ends: 1626 [2019-10-07 00:56:08,990 INFO L226 Difference]: Without dead ends: 1083 [2019-10-07 00:56:08,993 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-10-07 00:56:08,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2019-10-07 00:56:09,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 933. [2019-10-07 00:56:09,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 933 states. [2019-10-07 00:56:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 1505 transitions. [2019-10-07 00:56:09,047 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 1505 transitions. Word has length 96 [2019-10-07 00:56:09,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:56:09,047 INFO L462 AbstractCegarLoop]: Abstraction has 933 states and 1505 transitions. [2019-10-07 00:56:09,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 00:56:09,048 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 1505 transitions. [2019-10-07 00:56:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-07 00:56:09,053 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:56:09,053 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:56:09,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:56:09,262 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:56:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:56:09,262 INFO L82 PathProgramCache]: Analyzing trace with hash 494119127, now seen corresponding path program 1 times [2019-10-07 00:56:09,262 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:56:09,263 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:09,263 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:09,263 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:09,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:56:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:09,425 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:09,426 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:09,427 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 00:56:09,427 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-07 00:56:09,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 00:56:09,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 00:56:09,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-07 00:56:09,428 INFO L87 Difference]: Start difference. First operand 933 states and 1505 transitions. Second operand 6 states. [2019-10-07 00:56:10,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 00:56:10,151 INFO L93 Difference]: Finished difference Result 2353 states and 3945 transitions. [2019-10-07 00:56:10,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 00:56:10,152 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2019-10-07 00:56:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 00:56:10,168 INFO L225 Difference]: With dead ends: 2353 [2019-10-07 00:56:10,168 INFO L226 Difference]: Without dead ends: 1425 [2019-10-07 00:56:10,174 INFO L606 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 [2019-10-07 00:56:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1425 states. [2019-10-07 00:56:10,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1425 to 1417. [2019-10-07 00:56:10,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1417 states. [2019-10-07 00:56:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 2274 transitions. [2019-10-07 00:56:10,286 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 2274 transitions. Word has length 105 [2019-10-07 00:56:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 00:56:10,286 INFO L462 AbstractCegarLoop]: Abstraction has 1417 states and 2274 transitions. [2019-10-07 00:56:10,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 00:56:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 2274 transitions. [2019-10-07 00:56:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-07 00:56:10,297 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 00:56:10,297 INFO L385 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 00:56:10,297 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 00:56:10,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 00:56:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1462332342, now seen corresponding path program 1 times [2019-10-07 00:56:10,298 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 00:56:10,299 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:10,300 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:10,300 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 00:56:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 00:56:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:10,414 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 00:56:10,414 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 00:56:10,414 INFO L95 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 [2019-10-07 00:56:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 00:56:10,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-07 00:56:10,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 00:56:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:10,620 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 00:56:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 00:56:10,706 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 00:56:10,741 INFO L162 IcfgInterpreter]: Started Sifa with 81 locations of interest [2019-10-07 00:56:10,741 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 00:56:10,748 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 00:56:10,756 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 00:56:10,757 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 00:56:11,086 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 100 for LOIs [2019-10-07 00:56:11,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 00:56:11,582 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:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) 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:99) 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:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 00:56:11,589 INFO L168 Benchmark]: Toolchain (without parser) took 9712.53 ms. Allocated memory was 146.8 MB in the beginning and 319.8 MB in the end (delta: 173.0 MB). Free memory was 101.7 MB in the beginning and 123.3 MB in the end (delta: -21.6 MB). Peak memory consumption was 151.4 MB. Max. memory is 7.1 GB. [2019-10-07 00:56:11,590 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 00:56:11,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 756.37 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 101.5 MB in the beginning and 165.1 MB in the end (delta: -63.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2019-10-07 00:56:11,592 INFO L168 Benchmark]: Boogie Preprocessor took 119.22 ms. Allocated memory is still 205.5 MB. Free memory was 165.1 MB in the beginning and 160.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. [2019-10-07 00:56:11,593 INFO L168 Benchmark]: RCFGBuilder took 1886.53 ms. Allocated memory was 205.5 MB in the beginning and 244.8 MB in the end (delta: 39.3 MB). Free memory was 160.4 MB in the beginning and 194.3 MB in the end (delta: -33.9 MB). Peak memory consumption was 105.6 MB. Max. memory is 7.1 GB. [2019-10-07 00:56:11,595 INFO L168 Benchmark]: TraceAbstraction took 6946.07 ms. Allocated memory was 244.8 MB in the beginning and 319.8 MB in the end (delta: 75.0 MB). Free memory was 194.3 MB in the beginning and 123.3 MB in the end (delta: 71.0 MB). Peak memory consumption was 145.9 MB. Max. memory is 7.1 GB. [2019-10-07 00:56:11,599 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 756.37 ms. Allocated memory was 146.8 MB in the beginning and 205.5 MB in the end (delta: 58.7 MB). Free memory was 101.5 MB in the beginning and 165.1 MB in the end (delta: -63.6 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.22 ms. Allocated memory is still 205.5 MB. Free memory was 165.1 MB in the beginning and 160.4 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1886.53 ms. Allocated memory was 205.5 MB in the beginning and 244.8 MB in the end (delta: 39.3 MB). Free memory was 160.4 MB in the beginning and 194.3 MB in the end (delta: -33.9 MB). Peak memory consumption was 105.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6946.07 ms. Allocated memory was 244.8 MB in the beginning and 319.8 MB in the end (delta: 75.0 MB). Free memory was 194.3 MB in the beginning and 123.3 MB in the end (delta: 71.0 MB). Peak memory consumption was 145.9 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:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...