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/Problem01_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:53:28,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:53:28,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:53:28,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:53:28,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:53:28,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:53:28,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:53:28,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:53:28,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:53:28,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:53:28,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:53:28,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:53:28,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:53:28,814 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:53:28,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:53:28,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:53:28,816 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:53:28,817 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:53:28,819 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:53:28,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:53:28,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:53:28,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:53:28,824 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:53:28,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:53:28,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:53:28,829 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:53:28,830 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:53:28,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:53:28,831 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:53:28,832 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:53:28,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:53:28,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:53:28,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:53:28,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:53:28,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:53:28,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:53:28,835 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 [2019-10-14 23:53:28,849 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:53:28,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:53:28,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:53:28,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:53:28,851 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:53:28,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:53:28,851 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:53:28,851 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:53:28,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:53:28,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:53:28,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:53:28,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:53:28,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:53:28,853 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:53:28,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:53:28,853 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:53:28,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:53:28,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:53:28,854 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:53:28,854 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:53:28,854 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:53:28,854 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:53:28,854 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:53:28,855 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:53:28,855 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:53:28,855 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:53:28,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:53:28,855 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:53:28,856 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 [2019-10-14 23:53:29,136 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:53:29,149 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:53:29,152 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:53:29,153 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:53:29,154 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:53:29,155 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2019-10-14 23:53:29,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a956afa4/6e5b6a2860f44438bb4dd331594b5127/FLAG7557c1ba4 [2019-10-14 23:53:29,803 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:53:29,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label17.c [2019-10-14 23:53:29,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a956afa4/6e5b6a2860f44438bb4dd331594b5127/FLAG7557c1ba4 [2019-10-14 23:53:30,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a956afa4/6e5b6a2860f44438bb4dd331594b5127 [2019-10-14 23:53:30,098 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:53:30,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:53:30,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:30,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:53:30,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:53:30,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@958021d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30, skipping insertion in model container [2019-10-14 23:53:30,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,115 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:53:30,169 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:53:30,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:30,744 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:53:30,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:53:30,887 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:53:30,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30 WrapperNode [2019-10-14 23:53:30,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:53:30,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:53:30,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:53:30,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:53:30,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,930 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:30,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (1/1) ... [2019-10-14 23:53:31,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:53:31,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:53:31,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:53:31,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:53:31,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (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 [2019-10-14 23:53:31,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:53:31,105 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:53:31,106 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:53:31,106 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:53:31,106 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:53:31,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:53:31,108 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:53:31,109 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:53:31,109 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:53:31,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:53:31,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:53:32,590 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:53:32,590 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:53:32,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:32 BoogieIcfgContainer [2019-10-14 23:53:32,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:53:32,599 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:53:32,599 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:53:32,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:53:32,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:53:30" (1/3) ... [2019-10-14 23:53:32,606 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb3d6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:32, skipping insertion in model container [2019-10-14 23:53:32,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:53:30" (2/3) ... [2019-10-14 23:53:32,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb3d6b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:53:32, skipping insertion in model container [2019-10-14 23:53:32,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:53:32" (3/3) ... [2019-10-14 23:53:32,608 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label17.c [2019-10-14 23:53:32,619 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:53:32,627 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:53:32,639 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:53:32,672 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:53:32,672 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:53:32,673 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:53:32,673 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:53:32,673 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:53:32,673 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:53:32,674 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:53:32,674 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:53:32,708 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:53:32,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2019-10-14 23:53:32,727 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:32,729 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:32,730 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1778503114, now seen corresponding path program 1 times [2019-10-14 23:53:32,746 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:32,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877623605] [2019-10-14 23:53:32,747 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:32,747 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:32,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:33,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877623605] [2019-10-14 23:53:33,279 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:33,279 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:33,280 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259748889] [2019-10-14 23:53:33,288 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:33,290 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:33,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:33,314 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:53:34,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:34,232 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:53:34,236 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:34,237 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2019-10-14 23:53:34,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:34,266 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:53:34,266 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:53:34,278 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:34,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:53:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:53:34,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:53:34,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 412 transitions. [2019-10-14 23:53:34,360 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 412 transitions. Word has length 122 [2019-10-14 23:53:34,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:34,362 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 412 transitions. [2019-10-14 23:53:34,363 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:34,364 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 412 transitions. [2019-10-14 23:53:34,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-14 23:53:34,378 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:34,378 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:34,378 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:34,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:34,379 INFO L82 PathProgramCache]: Analyzing trace with hash -850587645, now seen corresponding path program 1 times [2019-10-14 23:53:34,382 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:34,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918917454] [2019-10-14 23:53:34,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:34,383 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:34,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:34,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918917454] [2019-10-14 23:53:34,575 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:34,575 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:53:34,575 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269229654] [2019-10-14 23:53:34,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:53:34,578 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:34,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:53:34,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:34,579 INFO L87 Difference]: Start difference. First operand 278 states and 412 transitions. Second operand 3 states. [2019-10-14 23:53:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:35,086 INFO L93 Difference]: Finished difference Result 820 states and 1233 transitions. [2019-10-14 23:53:35,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:53:35,088 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2019-10-14 23:53:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:35,100 INFO L225 Difference]: With dead ends: 820 [2019-10-14 23:53:35,101 INFO L226 Difference]: Without dead ends: 548 [2019-10-14 23:53:35,105 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:53:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2019-10-14 23:53:35,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 413. [2019-10-14 23:53:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 413 states. [2019-10-14 23:53:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 593 transitions. [2019-10-14 23:53:35,144 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 593 transitions. Word has length 139 [2019-10-14 23:53:35,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:35,144 INFO L462 AbstractCegarLoop]: Abstraction has 413 states and 593 transitions. [2019-10-14 23:53:35,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:53:35,145 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 593 transitions. [2019-10-14 23:53:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-10-14 23:53:35,147 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:35,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:53:35,148 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:35,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:35,148 INFO L82 PathProgramCache]: Analyzing trace with hash 252066703, now seen corresponding path program 1 times [2019-10-14 23:53:35,148 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:35,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955830715] [2019-10-14 23:53:35,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:35,149 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:35,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:35,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955830715] [2019-10-14 23:53:35,353 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:53:35,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:53:35,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798754821] [2019-10-14 23:53:35,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:53:35,355 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:53:35,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:53:35,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:53:35,356 INFO L87 Difference]: Start difference. First operand 413 states and 593 transitions. Second operand 6 states. [2019-10-14 23:53:36,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:53:36,100 INFO L93 Difference]: Finished difference Result 1116 states and 1631 transitions. [2019-10-14 23:53:36,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:53:36,101 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 165 [2019-10-14 23:53:36,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:53:36,106 INFO L225 Difference]: With dead ends: 1116 [2019-10-14 23:53:36,107 INFO L226 Difference]: Without dead ends: 709 [2019-10-14 23:53:36,108 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 [2019-10-14 23:53:36,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2019-10-14 23:53:36,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 699. [2019-10-14 23:53:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2019-10-14 23:53:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 950 transitions. [2019-10-14 23:53:36,149 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 950 transitions. Word has length 165 [2019-10-14 23:53:36,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:53:36,150 INFO L462 AbstractCegarLoop]: Abstraction has 699 states and 950 transitions. [2019-10-14 23:53:36,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:53:36,150 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 950 transitions. [2019-10-14 23:53:36,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-10-14 23:53:36,153 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:53:36,153 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:53:36,153 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:53:36,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:53:36,154 INFO L82 PathProgramCache]: Analyzing trace with hash -159860650, now seen corresponding path program 1 times [2019-10-14 23:53:36,154 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:53:36,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225713544] [2019-10-14 23:53:36,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:36,155 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:53:36,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:53:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:36,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225713544] [2019-10-14 23:53:36,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890480447] [2019-10-14 23:53:36,320 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 [2019-10-14 23:53:36,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:53:36,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:53:36,457 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:53:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:36,546 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:53:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:53:36,643 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1224430862] [2019-10-14 23:53:36,649 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 177 [2019-10-14 23:53:36,698 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:53:36,699 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)