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/Problem16_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:08:11,677 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:08:11,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:08:11,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:08:11,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:08:11,693 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:08:11,694 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:08:11,696 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:08:11,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:08:11,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:08:11,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:08:11,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:08:11,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:08:11,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:08:11,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:08:11,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:08:11,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:08:11,706 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:08:11,707 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:08:11,709 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:08:11,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:08:11,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:08:11,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:08:11,713 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:08:11,715 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:08:11,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:08:11,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:08:11,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:08:11,725 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 [2019-10-15 00:08:11,739 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:08:11,739 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:08:11,740 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:08:11,740 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:08:11,741 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:08:11,741 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:08:11,741 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:08:11,741 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:08:11,741 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:08:11,742 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:08:11,742 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:08:11,742 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:08:11,742 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:08:11,742 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:08:11,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:08:11,743 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:08:11,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:08:11,743 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:08:11,743 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:08:11,743 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:08:11,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:08:11,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:08:11,744 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:08:11,744 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:08:11,744 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:08:11,745 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:08:11,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:08:11,745 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:08:11,745 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 [2019-10-15 00:08:12,034 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:08:12,047 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:08:12,050 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:08:12,052 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:08:12,052 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:08:12,053 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label12.c [2019-10-15 00:08:12,125 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ee3abed/64707589a1ad4d8ca7341fa9b55ad4ff/FLAGd943f60e2 [2019-10-15 00:08:12,802 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:08:12,803 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label12.c [2019-10-15 00:08:12,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ee3abed/64707589a1ad4d8ca7341fa9b55ad4ff/FLAGd943f60e2 [2019-10-15 00:08:13,000 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a5ee3abed/64707589a1ad4d8ca7341fa9b55ad4ff [2019-10-15 00:08:13,010 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:08:13,012 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:08:13,013 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:13,013 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:08:13,019 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:08:13,020 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:13" (1/1) ... [2019-10-15 00:08:13,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3304fef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:13, skipping insertion in model container [2019-10-15 00:08:13,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:08:13" (1/1) ... [2019-10-15 00:08:13,030 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:08:13,095 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:08:13,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:13,882 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:08:14,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:08:14,252 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:08:14,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14 WrapperNode [2019-10-15 00:08:14,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:08:14,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:08:14,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:08:14,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:08:14,278 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (1/1) ... [2019-10-15 00:08:14,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:08:14,472 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:08:14,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:08:14,473 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:08:14,474 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (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 [2019-10-15 00:08:14,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:08:14,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:08:14,541 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:08:14,541 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:08:14,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:08:14,542 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:08:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:08:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:08:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:08:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:08:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:08:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:08:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:08:16,801 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:08:16,802 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:08:16,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:16 BoogieIcfgContainer [2019-10-15 00:08:16,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:08:16,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:08:16,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:08:16,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:08:16,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:08:13" (1/3) ... [2019-10-15 00:08:16,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0fa094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:16, skipping insertion in model container [2019-10-15 00:08:16,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:08:14" (2/3) ... [2019-10-15 00:08:16,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a0fa094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:08:16, skipping insertion in model container [2019-10-15 00:08:16,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:08:16" (3/3) ... [2019-10-15 00:08:16,812 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label12.c [2019-10-15 00:08:16,822 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:08:16,831 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:08:16,842 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:08:16,872 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:08:16,873 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:08:16,873 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:08:16,873 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:08:16,873 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:08:16,873 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:08:16,873 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:08:16,873 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:08:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-15 00:08:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 00:08:16,909 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:16,910 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] [2019-10-15 00:08:16,912 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:16,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1524372618, now seen corresponding path program 1 times [2019-10-15 00:08:16,926 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:16,926 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280758602] [2019-10-15 00:08:16,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,926 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:16,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:17,190 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280758602] [2019-10-15 00:08:17,191 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:17,191 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:08:17,192 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346762069] [2019-10-15 00:08:17,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:08:17,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:17,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:08:17,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:08:17,217 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-15 00:08:19,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:19,668 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-15 00:08:19,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:08:19,671 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2019-10-15 00:08:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:19,695 INFO L225 Difference]: With dead ends: 1153 [2019-10-15 00:08:19,696 INFO L226 Difference]: Without dead ends: 682 [2019-10-15 00:08:19,707 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 [2019-10-15 00:08:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-15 00:08:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-15 00:08:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-15 00:08:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-10-15 00:08:19,818 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 45 [2019-10-15 00:08:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:19,819 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-10-15 00:08:19,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:08:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-10-15 00:08:19,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-15 00:08:19,825 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:19,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:19,826 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1650431575, now seen corresponding path program 1 times [2019-10-15 00:08:19,827 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:19,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698253231] [2019-10-15 00:08:19,827 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:19,828 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:19,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:20,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:20,069 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698253231] [2019-10-15 00:08:20,069 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:20,069 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:08:20,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47841389] [2019-10-15 00:08:20,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:08:20,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:20,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:08:20,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:08:20,073 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-10-15 00:08:23,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:23,159 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-10-15 00:08:23,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:23,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 114 [2019-10-15 00:08:23,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:23,176 INFO L225 Difference]: With dead ends: 2066 [2019-10-15 00:08:23,177 INFO L226 Difference]: Without dead ends: 1390 [2019-10-15 00:08:23,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:08:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-10-15 00:08:23,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-10-15 00:08:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-10-15 00:08:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-10-15 00:08:23,279 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 114 [2019-10-15 00:08:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:23,280 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-10-15 00:08:23,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:08:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-10-15 00:08:23,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-15 00:08:23,287 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:23,287 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:23,288 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:23,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:23,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1950133058, now seen corresponding path program 1 times [2019-10-15 00:08:23,288 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:23,289 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677473381] [2019-10-15 00:08:23,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:23,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:23,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:23,508 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:23,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677473381] [2019-10-15 00:08:23,509 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:23,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:23,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914329499] [2019-10-15 00:08:23,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:23,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:23,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:23,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:23,511 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-10-15 00:08:26,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:26,446 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-10-15 00:08:26,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:26,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-10-15 00:08:26,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:26,464 INFO L225 Difference]: With dead ends: 3472 [2019-10-15 00:08:26,465 INFO L226 Difference]: Without dead ends: 2106 [2019-10-15 00:08:26,475 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 [2019-10-15 00:08:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-15 00:08:26,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-10-15 00:08:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-15 00:08:26,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-10-15 00:08:26,563 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 143 [2019-10-15 00:08:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:26,565 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-10-15 00:08:26,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:26,566 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-10-15 00:08:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-15 00:08:26,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:26,579 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:08:26,579 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:26,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 903433606, now seen corresponding path program 1 times [2019-10-15 00:08:26,580 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:26,580 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315942253] [2019-10-15 00:08:26,580 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:26,581 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:26,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:08:26,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315942253] [2019-10-15 00:08:26,915 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:08:26,916 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:08:26,916 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625730002] [2019-10-15 00:08:26,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:08:26,917 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:26,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:08:26,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:08:26,917 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-10-15 00:08:29,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:29,747 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-10-15 00:08:29,748 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:08:29,748 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-10-15 00:08:29,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:29,766 INFO L225 Difference]: With dead ends: 5241 [2019-10-15 00:08:29,766 INFO L226 Difference]: Without dead ends: 3166 [2019-10-15 00:08:29,772 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 [2019-10-15 00:08:29,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-10-15 00:08:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-10-15 00:08:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-10-15 00:08:29,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-10-15 00:08:29,854 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 161 [2019-10-15 00:08:29,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:29,855 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-10-15 00:08:29,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:08:29,855 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-10-15 00:08:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-15 00:08:29,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:29,860 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, 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] [2019-10-15 00:08:29,860 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:29,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:29,860 INFO L82 PathProgramCache]: Analyzing trace with hash 582436338, now seen corresponding path program 1 times [2019-10-15 00:08:29,861 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:29,861 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659939021] [2019-10-15 00:08:29,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:29,861 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:29,861 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 104 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:08:30,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659939021] [2019-10-15 00:08:30,058 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640670527] [2019-10-15 00:08:30,059 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 [2019-10-15 00:08:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:30,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:30,176 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:08:30,325 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 00:08:30,415 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:08:30,415 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-10-15 00:08:30,415 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060102019] [2019-10-15 00:08:30,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:08:30,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:08:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:08:30,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:30,417 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-10-15 00:08:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:08:37,789 INFO L93 Difference]: Finished difference Result 8317 states and 11073 transitions. [2019-10-15 00:08:37,792 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:08:37,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 243 [2019-10-15 00:08:37,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:08:37,822 INFO L225 Difference]: With dead ends: 8317 [2019-10-15 00:08:37,822 INFO L226 Difference]: Without dead ends: 5183 [2019-10-15 00:08:37,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:08:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2019-10-15 00:08:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 4842. [2019-10-15 00:08:37,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4842 states. [2019-10-15 00:08:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 6246 transitions. [2019-10-15 00:08:37,973 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 6246 transitions. Word has length 243 [2019-10-15 00:08:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:08:37,974 INFO L462 AbstractCegarLoop]: Abstraction has 4842 states and 6246 transitions. [2019-10-15 00:08:37,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:08:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 6246 transitions. [2019-10-15 00:08:37,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2019-10-15 00:08:37,988 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:08:37,988 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:08:38,192 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:08:38,193 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:08:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:08:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash 948882286, now seen corresponding path program 1 times [2019-10-15 00:08:38,194 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:08:38,194 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543509880] [2019-10-15 00:08:38,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:38,195 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:08:38,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:08:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:08:38,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543509880] [2019-10-15 00:08:38,743 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156388035] [2019-10-15 00:08:38,743 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 [2019-10-15 00:08:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:08:38,878 INFO L256 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:08:38,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:08:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 432 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-15 00:08:39,122 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:08:39,503 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 231 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-10-15 00:08:39,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [27518578] [2019-10-15 00:08:39,517 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 488 [2019-10-15 00:08:39,641 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:08:39,642 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)