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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:51,511 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:51,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:51,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:51,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:51,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:51,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:51,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:51,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:51,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:51,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:51,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:51,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:51,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:51,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:51,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:51,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:51,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:51,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:51,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:51,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:51,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:51,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:51,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:51,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:07:51,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:07:51,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:07:51,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:07:51,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:07:51,562 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:07:51,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:51,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:51,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:51,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:51,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:51,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:51,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:51,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:51,570 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:51,571 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:51,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:51,574 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 20:07:51,593 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:51,594 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:51,596 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:51,596 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:51,596 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:51,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:51,597 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:51,597 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:51,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:51,597 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:51,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:51,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:51,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:51,599 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:51,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:51,599 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:51,600 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:51,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:51,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:51,600 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:51,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:51,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:51,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:51,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:51,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:51,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:51,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:51,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:51,602 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:07:51,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:51,904 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:51,909 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:51,910 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:51,911 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:51,912 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label56.c [2019-10-13 20:07:51,980 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/364078f51/a1d67dae533e4373be4159c701866708/FLAGcdaf507ae [2019-10-13 20:07:52,515 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:52,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label56.c [2019-10-13 20:07:52,529 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/364078f51/a1d67dae533e4373be4159c701866708/FLAGcdaf507ae [2019-10-13 20:07:52,845 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/364078f51/a1d67dae533e4373be4159c701866708 [2019-10-13 20:07:52,857 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:52,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:52,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:52,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:52,867 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:52,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:52,871 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c6ea3f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52, skipping insertion in model container [2019-10-13 20:07:52,871 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:52,880 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:52,944 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:53,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:53,608 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:53,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:53,812 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:53,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53 WrapperNode [2019-10-13 20:07:53,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:53,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:53,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:53,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:53,830 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,906 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (1/1) ... [2019-10-13 20:07:53,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:53,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:53,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:53,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:53,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (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 20:07:54,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:54,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:54,064 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:54,066 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:54,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:54,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:55,783 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:55,786 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:55,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:55 BoogieIcfgContainer [2019-10-13 20:07:55,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:55,792 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:55,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:55,800 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:55,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:52" (1/3) ... [2019-10-13 20:07:55,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396ab31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:55, skipping insertion in model container [2019-10-13 20:07:55,802 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:53" (2/3) ... [2019-10-13 20:07:55,802 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396ab31a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:55, skipping insertion in model container [2019-10-13 20:07:55,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:55" (3/3) ... [2019-10-13 20:07:55,807 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label56.c [2019-10-13 20:07:55,820 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:55,832 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:55,844 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:55,881 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:55,881 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:55,882 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:55,882 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:55,882 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:55,882 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:55,882 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:55,882 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:55,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 20:07:55,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:55,916 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:55,919 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:55,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:55,925 INFO L82 PathProgramCache]: Analyzing trace with hash -718662862, now seen corresponding path program 1 times [2019-10-13 20:07:55,935 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:55,936 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551235659] [2019-10-13 20:07:55,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:55,936 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:55,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:56,205 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 20:07:56,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551235659] [2019-10-13 20:07:56,207 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:56,207 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:07:56,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643445805] [2019-10-13 20:07:56,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:07:56,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:07:56,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:56,240 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-13 20:07:57,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:57,685 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-13 20:07:57,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:07:57,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-10-13 20:07:57,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:57,721 INFO L225 Difference]: With dead ends: 688 [2019-10-13 20:07:57,721 INFO L226 Difference]: Without dead ends: 372 [2019-10-13 20:07:57,734 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:07:57,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-13 20:07:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-13 20:07:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-13 20:07:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-13 20:07:57,860 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 23 [2019-10-13 20:07:57,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:57,861 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-13 20:07:57,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:07:57,862 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-13 20:07:57,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-13 20:07:57,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:57,871 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:57,872 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1766651886, now seen corresponding path program 1 times [2019-10-13 20:07:57,873 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:57,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785259598] [2019-10-13 20:07:57,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:58,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785259598] [2019-10-13 20:07:58,215 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:58,216 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:07:58,216 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437912141] [2019-10-13 20:07:58,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:07:58,218 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:58,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:07:58,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:07:58,219 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-13 20:07:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:59,514 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-13 20:07:59,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:07:59,518 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 109 [2019-10-13 20:07:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:59,525 INFO L225 Difference]: With dead ends: 936 [2019-10-13 20:07:59,526 INFO L226 Difference]: Without dead ends: 570 [2019-10-13 20:07:59,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 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 20:07:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-13 20:07:59,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-13 20:07:59,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-13 20:07:59,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-13 20:07:59,578 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 109 [2019-10-13 20:07:59,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:59,579 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-13 20:07:59,579 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:07:59,579 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-13 20:07:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-13 20:07:59,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:59,589 INFO L380 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, 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 20:07:59,590 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:59,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1723912061, now seen corresponding path program 1 times [2019-10-13 20:07:59,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:59,592 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165599740] [2019-10-13 20:07:59,592 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:59,592 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:59,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:59,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:59,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165599740] [2019-10-13 20:07:59,749 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:59,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:59,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768837572] [2019-10-13 20:07:59,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:59,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:59,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:59,752 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-13 20:08:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:01,282 INFO L93 Difference]: Finished difference Result 2220 states and 3283 transitions. [2019-10-13 20:08:01,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:08:01,284 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2019-10-13 20:08:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:01,306 INFO L225 Difference]: With dead ends: 2220 [2019-10-13 20:08:01,306 INFO L226 Difference]: Without dead ends: 1664 [2019-10-13 20:08:01,309 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:08:01,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-13 20:08:01,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-10-13 20:08:01,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-10-13 20:08:01,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2318 transitions. [2019-10-13 20:08:01,372 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2318 transitions. Word has length 118 [2019-10-13 20:08:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:01,374 INFO L462 AbstractCegarLoop]: Abstraction has 1664 states and 2318 transitions. [2019-10-13 20:08:01,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:08:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2318 transitions. [2019-10-13 20:08:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2019-10-13 20:08:01,387 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:01,387 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:08:01,387 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:01,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:01,388 INFO L82 PathProgramCache]: Analyzing trace with hash -718289567, now seen corresponding path program 1 times [2019-10-13 20:08:01,388 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:01,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811783821] [2019-10-13 20:08:01,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:01,389 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:01,389 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:01,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 122 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:01,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811783821] [2019-10-13 20:08:01,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683902308] [2019-10-13 20:08:01,679 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 20:08:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:01,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 20:08:01,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:01,915 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 20:08:02,049 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:02,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,222 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,226 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,261 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,354 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:08:02,677 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 32 proven. 101 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:02,678 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:08:02,678 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 12 [2019-10-13 20:08:02,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157053014] [2019-10-13 20:08:02,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:08:02,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:08:02,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:08:02,681 INFO L87 Difference]: Start difference. First operand 1664 states and 2318 transitions. Second operand 5 states. [2019-10-13 20:08:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:08:04,089 INFO L93 Difference]: Finished difference Result 3542 states and 4976 transitions. [2019-10-13 20:08:04,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:08:04,090 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2019-10-13 20:08:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:08:04,103 INFO L225 Difference]: With dead ends: 3542 [2019-10-13 20:08:04,103 INFO L226 Difference]: Without dead ends: 1884 [2019-10-13 20:08:04,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2019-10-13 20:08:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2019-10-13 20:08:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1502. [2019-10-13 20:08:04,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1502 states. [2019-10-13 20:08:04,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 2078 transitions. [2019-10-13 20:08:04,166 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 2078 transitions. Word has length 240 [2019-10-13 20:08:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:08:04,167 INFO L462 AbstractCegarLoop]: Abstraction has 1502 states and 2078 transitions. [2019-10-13 20:08:04,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:08:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 2078 transitions. [2019-10-13 20:08:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-10-13 20:08:04,175 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:08:04,175 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:08:04,381 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:08:04,382 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:08:04,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:04,382 INFO L82 PathProgramCache]: Analyzing trace with hash -528490103, now seen corresponding path program 1 times [2019-10-13 20:08:04,383 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:08:04,383 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991385812] [2019-10-13 20:08:04,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:04,384 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:08:04,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:08:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:05,206 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 134 proven. 183 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:05,206 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991385812] [2019-10-13 20:08:05,207 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502884059] [2019-10-13 20:08:05,207 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 20:08:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:08:05,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 20:08:05,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:05,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:08:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 251 proven. 53 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-13 20:08:05,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:05,686 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 20:08:06,244 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 56 proven. 261 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:08:06,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1795923071] [2019-10-13 20:08:06,252 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 325 [2019-10-13 20:08:06,300 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:08:06,300 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:08:19,433 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:08:19,435 INFO L272 AbstractInterpreter]: Visited 121 different actions 237 times. Merged at 4 different actions 5 times. Never widened. Performed 485 root evaluator evaluations with a maximum evaluation depth of 13. Performed 485 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-13 20:08:19,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:19,439 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:24,765 INFO L227 lantSequenceWeakener]: Weakened 321 states. On average, predicates are now at 77.36% of their original sizes. [2019-10-13 20:08:24,765 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:24,835 INFO L553 sIntCurrentIteration]: We unified 323 AI predicates to 323 [2019-10-13 20:08:24,836 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:24,836 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:24,837 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-13 20:08:24,837 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693880537] [2019-10-13 20:08:24,838 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:24,839 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:24,839 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:24,840 INFO L87 Difference]: Start difference. First operand 1502 states and 2078 transitions. Second operand 11 states.