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/Problem10_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:03:26,608 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:03:26,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:03:26,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:03:26,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:03:26,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:03:26,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:03:26,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:03:26,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:03:26,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:03:26,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:03:26,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:03:26,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:03:26,633 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:03:26,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:03:26,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:03:26,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:03:26,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:03:26,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:03:26,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:03:26,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:03:26,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:03:26,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:03:26,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:03:26,647 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:03:26,647 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:03:26,648 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:03:26,648 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:03:26,649 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:03:26,650 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:03:26,650 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:03:26,651 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:03:26,651 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:03:26,652 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:03:26,653 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:03:26,653 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:03:26,654 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:03:26,654 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:03:26,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:03:26,655 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:03:26,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:03:26,657 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 20:03:26,671 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:03:26,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:03:26,673 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:03:26,673 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:03:26,673 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:03:26,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:03:26,673 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:03:26,674 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:03:26,674 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:03:26,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:03:26,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:03:26,674 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:03:26,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:03:26,675 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:03:26,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:03:26,675 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:03:26,675 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:03:26,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:03:26,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:03:26,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:03:26,676 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:03:26,676 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:03:26,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:03:26,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:03:26,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:03:26,677 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:03:26,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:03:26,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:03:26,678 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 20:03:26,976 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:03:26,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:03:26,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:03:26,995 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:03:26,995 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:03:26,996 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-13 20:03:27,064 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f282efd1/35a6c22307d8432b8868f3921278d5e0/FLAG3007768d7 [2019-10-13 20:03:27,637 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:03:27,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-13 20:03:27,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f282efd1/35a6c22307d8432b8868f3921278d5e0/FLAG3007768d7 [2019-10-13 20:03:27,889 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f282efd1/35a6c22307d8432b8868f3921278d5e0 [2019-10-13 20:03:27,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:03:27,899 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:03:27,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:27,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:03:27,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:03:27,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:27" (1/1) ... [2019-10-13 20:03:27,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33ff8af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:27, skipping insertion in model container [2019-10-13 20:03:27,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:27" (1/1) ... [2019-10-13 20:03:27,915 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:03:27,967 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:03:28,479 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:28,486 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:03:28,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:03:28,632 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:03:28,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28 WrapperNode [2019-10-13 20:03:28,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:03:28,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:03:28,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:03:28,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:03:28,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (1/1) ... [2019-10-13 20:03:28,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:03:28,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:03:28,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:03:28,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:03:28,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (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 20:03:28,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:03:28,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:03:28,854 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:03:28,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:03:28,855 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:03:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:03:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:03:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:03:28,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:03:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:03:28,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:03:30,061 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:03:30,062 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:03:30,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:30 BoogieIcfgContainer [2019-10-13 20:03:30,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:03:30,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:03:30,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:03:30,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:03:30,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:27" (1/3) ... [2019-10-13 20:03:30,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7712c69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:30, skipping insertion in model container [2019-10-13 20:03:30,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:28" (2/3) ... [2019-10-13 20:03:30,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7712c69f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:30, skipping insertion in model container [2019-10-13 20:03:30,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:30" (3/3) ... [2019-10-13 20:03:30,082 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2019-10-13 20:03:30,095 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:03:30,106 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:03:30,118 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:03:30,151 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:03:30,151 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:03:30,151 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:03:30,152 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:03:30,152 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:03:30,152 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:03:30,152 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:03:30,153 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:03:30,182 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 20:03:30,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 20:03:30,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:30,196 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:30,197 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:30,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1400340266, now seen corresponding path program 1 times [2019-10-13 20:03:30,217 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:30,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447096576] [2019-10-13 20:03:30,218 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:30,219 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:30,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:30,673 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 20:03:30,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447096576] [2019-10-13 20:03:30,676 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:30,676 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:03:30,677 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88224376] [2019-10-13 20:03:30,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:30,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:30,704 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-13 20:03:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:32,102 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-13 20:03:32,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:32,104 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-10-13 20:03:32,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:32,125 INFO L225 Difference]: With dead ends: 733 [2019-10-13 20:03:32,125 INFO L226 Difference]: Without dead ends: 437 [2019-10-13 20:03:32,132 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:03:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-13 20:03:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-13 20:03:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-13 20:03:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-13 20:03:32,206 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 71 [2019-10-13 20:03:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:32,207 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-13 20:03:32,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-13 20:03:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 20:03:32,214 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:32,215 INFO L380 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, 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] [2019-10-13 20:03:32,215 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash 41629170, now seen corresponding path program 1 times [2019-10-13 20:03:32,216 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:32,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5711873] [2019-10-13 20:03:32,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:32,216 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:32,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 57 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:32,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5711873] [2019-10-13 20:03:32,469 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067362153] [2019-10-13 20:03:32,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:03:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:32,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:03:32,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:32,640 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:32,720 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-13 20:03:32,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-13 20:03:32,721 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647643720] [2019-10-13 20:03:32,725 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:03:32,725 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:32,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:03:32,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:03:32,726 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-10-13 20:03:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:33,931 INFO L93 Difference]: Finished difference Result 1154 states and 1795 transitions. [2019-10-13 20:03:33,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:03:33,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-10-13 20:03:33,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:33,938 INFO L225 Difference]: With dead ends: 1154 [2019-10-13 20:03:33,939 INFO L226 Difference]: Without dead ends: 866 [2019-10-13 20:03:33,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:03:33,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-13 20:03:34,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2019-10-13 20:03:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-10-13 20:03:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1235 transitions. [2019-10-13 20:03:34,011 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1235 transitions. Word has length 141 [2019-10-13 20:03:34,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:34,012 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1235 transitions. [2019-10-13 20:03:34,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:03:34,013 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1235 transitions. [2019-10-13 20:03:34,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 20:03:34,019 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:34,019 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:03:34,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:34,226 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash -395920931, now seen corresponding path program 1 times [2019-10-13 20:03:34,227 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:34,227 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335570817] [2019-10-13 20:03:34,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:34,228 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:34,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:34,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335570817] [2019-10-13 20:03:34,422 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:34,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:34,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756307709] [2019-10-13 20:03:34,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:34,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:34,425 INFO L87 Difference]: Start difference. First operand 866 states and 1235 transitions. Second operand 6 states. [2019-10-13 20:03:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:35,455 INFO L93 Difference]: Finished difference Result 1766 states and 2578 transitions. [2019-10-13 20:03:35,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:35,456 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-13 20:03:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:35,464 INFO L225 Difference]: With dead ends: 1766 [2019-10-13 20:03:35,464 INFO L226 Difference]: Without dead ends: 906 [2019-10-13 20:03:35,467 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 20:03:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-13 20:03:35,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 886. [2019-10-13 20:03:35,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-13 20:03:35,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1211 transitions. [2019-10-13 20:03:35,521 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1211 transitions. Word has length 152 [2019-10-13 20:03:35,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:35,521 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1211 transitions. [2019-10-13 20:03:35,521 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1211 transitions. [2019-10-13 20:03:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-13 20:03:35,529 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:35,531 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:03:35,532 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:35,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:35,532 INFO L82 PathProgramCache]: Analyzing trace with hash 421403873, now seen corresponding path program 1 times [2019-10-13 20:03:35,533 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:35,533 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763698304] [2019-10-13 20:03:35,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:35,533 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:35,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:35,773 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763698304] [2019-10-13 20:03:35,773 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:03:35,774 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:03:35,774 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680022528] [2019-10-13 20:03:35,774 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:03:35,775 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:35,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:03:35,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:03:35,775 INFO L87 Difference]: Start difference. First operand 886 states and 1211 transitions. Second operand 6 states. [2019-10-13 20:03:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:36,709 INFO L93 Difference]: Finished difference Result 2394 states and 3478 transitions. [2019-10-13 20:03:36,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:03:36,713 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 202 [2019-10-13 20:03:36,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:36,728 INFO L225 Difference]: With dead ends: 2394 [2019-10-13 20:03:36,728 INFO L226 Difference]: Without dead ends: 1514 [2019-10-13 20:03:36,732 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 20:03:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2019-10-13 20:03:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1482. [2019-10-13 20:03:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2019-10-13 20:03:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2029 transitions. [2019-10-13 20:03:36,809 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2029 transitions. Word has length 202 [2019-10-13 20:03:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:36,811 INFO L462 AbstractCegarLoop]: Abstraction has 1482 states and 2029 transitions. [2019-10-13 20:03:36,811 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:03:36,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2029 transitions. [2019-10-13 20:03:36,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-13 20:03:36,818 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:36,818 INFO L380 BasicCegarLoop]: trace histogram [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, 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 20:03:36,818 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:36,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1534813554, now seen corresponding path program 1 times [2019-10-13 20:03:36,819 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:36,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491606574] [2019-10-13 20:03:36,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:36,820 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:36,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:36,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:37,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491606574] [2019-10-13 20:03:37,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925370482] [2019-10-13 20:03:37,016 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 20:03:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:37,150 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:03:37,157 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 20:03:37,261 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:03:37,361 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:03:37,361 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-13 20:03:37,361 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925596328] [2019-10-13 20:03:37,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:03:37,362 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:03:37,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:03:37,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:03:37,363 INFO L87 Difference]: Start difference. First operand 1482 states and 2029 transitions. Second operand 5 states. [2019-10-13 20:03:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:03:38,411 INFO L93 Difference]: Finished difference Result 4019 states and 5739 transitions. [2019-10-13 20:03:38,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:03:38,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2019-10-13 20:03:38,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:03:38,431 INFO L225 Difference]: With dead ends: 4019 [2019-10-13 20:03:38,432 INFO L226 Difference]: Without dead ends: 2543 [2019-10-13 20:03:38,437 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:03:38,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2019-10-13 20:03:38,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2509. [2019-10-13 20:03:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2509 states. [2019-10-13 20:03:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3402 transitions. [2019-10-13 20:03:38,528 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3402 transitions. Word has length 221 [2019-10-13 20:03:38,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:03:38,529 INFO L462 AbstractCegarLoop]: Abstraction has 2509 states and 3402 transitions. [2019-10-13 20:03:38,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:03:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3402 transitions. [2019-10-13 20:03:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-13 20:03:38,536 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:03:38,536 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 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 20:03:38,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:38,742 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:03:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:03:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1716693714, now seen corresponding path program 1 times [2019-10-13 20:03:38,743 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:03:38,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156276138] [2019-10-13 20:03:38,744 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:38,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:03:38,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:03:38,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 20:03:39,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156276138] [2019-10-13 20:03:39,037 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699289940] [2019-10-13 20:03:39,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:03:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:03:39,134 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 20:03:39,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:03:39,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:39,189 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,190 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,208 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,212 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,213 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,216 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,218 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,221 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,225 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:39,228 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,246 WARN L191 SmtUtils]: Spent 11.96 s on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2019-10-13 20:03:51,289 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:51,592 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:03:51,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,782 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:51,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 20:03:51,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:51,791 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 20:03:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:03:51,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [802731426] [2019-10-13 20:03:51,920 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 228 [2019-10-13 20:03:51,996 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:03:51,997 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:03:56,204 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.