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/Problem02_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:20,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:20,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:20,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:20,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:20,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:20,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:20,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:20,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:20,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:20,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:20,588 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:20,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:20,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:20,590 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:20,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:20,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:20,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:20,594 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:20,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:20,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:20,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:20,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:20,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:20,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:20,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:20,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:20,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:20,622 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 23:56:20,647 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:20,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:20,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:20,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:20,650 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:20,650 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:20,650 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:20,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:20,650 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:20,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:20,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:20,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:20,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:20,653 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:20,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:20,653 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:20,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:20,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:20,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:20,654 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:20,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:20,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:20,655 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:20,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:20,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:20,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:20,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:20,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:20,656 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 23:56:20,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:20,948 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:20,952 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:20,953 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:20,954 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:20,954 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-10-14 23:56:21,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cef0bd24/715d131ccc2d478f8dafeb7d02650aad/FLAGa64857981 [2019-10-14 23:56:21,574 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:21,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label22.c [2019-10-14 23:56:21,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cef0bd24/715d131ccc2d478f8dafeb7d02650aad/FLAGa64857981 [2019-10-14 23:56:21,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cef0bd24/715d131ccc2d478f8dafeb7d02650aad [2019-10-14 23:56:21,870 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:21,872 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:21,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:21,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:21,877 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:21,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:21" (1/1) ... [2019-10-14 23:56:21,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f8ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:21, skipping insertion in model container [2019-10-14 23:56:21,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:21" (1/1) ... [2019-10-14 23:56:21,888 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:21,948 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:22,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:22,502 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:22,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:22,653 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:22,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22 WrapperNode [2019-10-14 23:56:22,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:22,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:22,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:22,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:22,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,728 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,767 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:22,767 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:22,767 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:22,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:22,769 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (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 23:56:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:22,826 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:23,939 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:23,939 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:23,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:23 BoogieIcfgContainer [2019-10-14 23:56:23,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:23,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:23,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:23,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:23,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:21" (1/3) ... [2019-10-14 23:56:23,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1576d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:23, skipping insertion in model container [2019-10-14 23:56:23,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (2/3) ... [2019-10-14 23:56:23,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1576d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:23, skipping insertion in model container [2019-10-14 23:56:23,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:23" (3/3) ... [2019-10-14 23:56:23,951 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label22.c [2019-10-14 23:56:23,961 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:23,970 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:23,983 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:24,011 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:24,011 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:24,012 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:24,012 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:24,012 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:24,012 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:24,012 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:24,013 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:24,039 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 23:56:24,051 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:24,052 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] [2019-10-14 23:56:24,054 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:24,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:24,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1125290487, now seen corresponding path program 1 times [2019-10-14 23:56:24,070 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:24,070 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492275381] [2019-10-14 23:56:24,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:24,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:24,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:24,472 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 23:56:24,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492275381] [2019-10-14 23:56:24,474 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:24,474 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:24,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119668848] [2019-10-14 23:56:24,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:24,482 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:24,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:24,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:24,500 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:25,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:25,430 INFO L93 Difference]: Finished difference Result 623 states and 1065 transitions. [2019-10-14 23:56:25,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:25,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 103 [2019-10-14 23:56:25,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:25,449 INFO L225 Difference]: With dead ends: 623 [2019-10-14 23:56:25,450 INFO L226 Difference]: Without dead ends: 325 [2019-10-14 23:56:25,460 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 [2019-10-14 23:56:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2019-10-14 23:56:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2019-10-14 23:56:25,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:56:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 473 transitions. [2019-10-14 23:56:25,574 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 473 transitions. Word has length 103 [2019-10-14 23:56:25,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:25,576 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 473 transitions. [2019-10-14 23:56:25,577 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 473 transitions. [2019-10-14 23:56:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 23:56:25,588 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:25,589 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:25,589 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:25,590 INFO L82 PathProgramCache]: Analyzing trace with hash 93763940, now seen corresponding path program 1 times [2019-10-14 23:56:25,590 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:25,590 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991862589] [2019-10-14 23:56:25,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:25,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:25,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:25,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991862589] [2019-10-14 23:56:25,748 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:25,748 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:25,748 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092877972] [2019-10-14 23:56:25,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:25,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:25,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:25,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:25,752 INFO L87 Difference]: Start difference. First operand 321 states and 473 transitions. Second operand 6 states. [2019-10-14 23:56:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:26,555 INFO L93 Difference]: Finished difference Result 955 states and 1447 transitions. [2019-10-14 23:56:26,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:26,556 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2019-10-14 23:56:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:26,563 INFO L225 Difference]: With dead ends: 955 [2019-10-14 23:56:26,563 INFO L226 Difference]: Without dead ends: 640 [2019-10-14 23:56:26,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:56:26,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2019-10-14 23:56:26,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 623. [2019-10-14 23:56:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2019-10-14 23:56:26,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 903 transitions. [2019-10-14 23:56:26,613 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 903 transitions. Word has length 123 [2019-10-14 23:56:26,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:26,613 INFO L462 AbstractCegarLoop]: Abstraction has 623 states and 903 transitions. [2019-10-14 23:56:26,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:26,614 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 903 transitions. [2019-10-14 23:56:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 23:56:26,619 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:26,619 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, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:26,620 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:26,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:26,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1391612558, now seen corresponding path program 1 times [2019-10-14 23:56:26,621 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:26,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637050511] [2019-10-14 23:56:26,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:26,621 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:26,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:26,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:26,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637050511] [2019-10-14 23:56:26,798 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:26,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:26,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225885233] [2019-10-14 23:56:26,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:26,801 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:26,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:26,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:26,802 INFO L87 Difference]: Start difference. First operand 623 states and 903 transitions. Second operand 3 states. [2019-10-14 23:56:27,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:27,354 INFO L93 Difference]: Finished difference Result 1679 states and 2464 transitions. [2019-10-14 23:56:27,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:27,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-14 23:56:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:27,368 INFO L225 Difference]: With dead ends: 1679 [2019-10-14 23:56:27,369 INFO L226 Difference]: Without dead ends: 1062 [2019-10-14 23:56:27,371 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 23:56:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2019-10-14 23:56:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 918. [2019-10-14 23:56:27,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 918 states. [2019-10-14 23:56:27,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 1260 transitions. [2019-10-14 23:56:27,407 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 1260 transitions. Word has length 124 [2019-10-14 23:56:27,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:27,408 INFO L462 AbstractCegarLoop]: Abstraction has 918 states and 1260 transitions. [2019-10-14 23:56:27,408 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:27,408 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 1260 transitions. [2019-10-14 23:56:27,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:56:27,412 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:27,412 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 23:56:27,412 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:27,413 INFO L82 PathProgramCache]: Analyzing trace with hash -379164823, now seen corresponding path program 1 times [2019-10-14 23:56:27,413 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:27,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117151054] [2019-10-14 23:56:27,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:27,414 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:27,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:27,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:27,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117151054] [2019-10-14 23:56:27,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775671158] [2019-10-14 23:56:27,556 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 23:56:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:27,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:27,696 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:27,792 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:27,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [591292466] [2019-10-14 23:56:27,893 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 132 [2019-10-14 23:56:27,958 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:27,958 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)