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/Problem03_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:20,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:20,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:20,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:58:20,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:58:20,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:58:20,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:58:20,756 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:58:20,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:58:20,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:58:20,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:58:20,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:58:20,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:20,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:20,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:20,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:20,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:20,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:20,769 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:20,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:20,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:20,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:20,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:20,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:20,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:20,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:20,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:20,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:20,797 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 23:58:20,834 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:20,834 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:20,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:20,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:20,840 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:20,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:20,841 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:20,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:20,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:20,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:20,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:20,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:20,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:20,842 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:20,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:20,843 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:20,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:20,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:20,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:20,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:20,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:20,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:20,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:20,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:20,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:20,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:20,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:20,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:20,846 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 23:58:21,132 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:21,151 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:21,154 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:21,156 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:21,156 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:21,157 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-10-14 23:58:21,230 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660b12969/43bf2cdb396d46c79b9d35a6d94ed2d3/FLAGefb078b9b [2019-10-14 23:58:21,878 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:21,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-10-14 23:58:21,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660b12969/43bf2cdb396d46c79b9d35a6d94ed2d3/FLAGefb078b9b [2019-10-14 23:58:22,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660b12969/43bf2cdb396d46c79b9d35a6d94ed2d3 [2019-10-14 23:58:22,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:22,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:22,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:22,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:22,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:22,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:22" (1/1) ... [2019-10-14 23:58:22,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@799252b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:22, skipping insertion in model container [2019-10-14 23:58:22,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:22" (1/1) ... [2019-10-14 23:58:22,073 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:22,156 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:22,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:23,061 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:23,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:23,456 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:23,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23 WrapperNode [2019-10-14 23:58:23,457 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:23,458 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:23,458 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:23,458 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:23,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,503 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,568 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (1/1) ... [2019-10-14 23:58:23,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:23,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:23,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:23,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:23,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (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 23:58:23,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:23,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:23,686 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:23,686 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:25,616 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:25,617 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:25,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:25 BoogieIcfgContainer [2019-10-14 23:58:25,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:25,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:25,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:25,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:25,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:22" (1/3) ... [2019-10-14 23:58:25,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264ee5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:25, skipping insertion in model container [2019-10-14 23:58:25,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:23" (2/3) ... [2019-10-14 23:58:25,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264ee5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:25, skipping insertion in model container [2019-10-14 23:58:25,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:25" (3/3) ... [2019-10-14 23:58:25,629 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2019-10-14 23:58:25,639 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:25,648 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:25,660 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:25,692 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:25,692 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:25,692 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:25,693 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:25,693 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:25,693 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:25,693 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:25,693 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:25,721 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:25,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 23:58:25,737 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:25,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:25,740 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:25,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:25,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1955035064, now seen corresponding path program 1 times [2019-10-14 23:58:25,758 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:25,758 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677669501] [2019-10-14 23:58:25,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:25,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:25,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:26,577 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 23:58:26,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677669501] [2019-10-14 23:58:26,578 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:26,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:26,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3249820] [2019-10-14 23:58:26,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:26,588 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:26,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:26,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:26,605 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:58:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:27,855 INFO L93 Difference]: Finished difference Result 835 states and 1476 transitions. [2019-10-14 23:58:27,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:27,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-14 23:58:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:27,878 INFO L225 Difference]: With dead ends: 835 [2019-10-14 23:58:27,879 INFO L226 Difference]: Without dead ends: 462 [2019-10-14 23:58:27,886 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 23:58:27,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-10-14 23:58:27,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-10-14 23:58:27,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-10-14 23:58:27,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-10-14 23:58:27,975 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 173 [2019-10-14 23:58:27,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:27,976 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-10-14 23:58:27,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:27,976 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-10-14 23:58:27,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 23:58:27,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:27,983 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:27,984 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:27,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:27,984 INFO L82 PathProgramCache]: Analyzing trace with hash -209024133, now seen corresponding path program 1 times [2019-10-14 23:58:27,984 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:27,985 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603921890] [2019-10-14 23:58:27,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:27,985 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:27,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:28,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:28,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603921890] [2019-10-14 23:58:28,224 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:28,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:28,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146184954] [2019-10-14 23:58:28,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:28,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:28,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:28,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:28,228 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-10-14 23:58:29,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:29,887 INFO L93 Difference]: Finished difference Result 1391 states and 2302 transitions. [2019-10-14 23:58:29,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:58:29,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 182 [2019-10-14 23:58:29,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:29,898 INFO L225 Difference]: With dead ends: 1391 [2019-10-14 23:58:29,899 INFO L226 Difference]: Without dead ends: 937 [2019-10-14 23:58:29,901 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 23:58:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-14 23:58:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-10-14 23:58:29,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-14 23:58:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-10-14 23:58:29,962 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 182 [2019-10-14 23:58:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:29,962 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-10-14 23:58:29,963 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-10-14 23:58:29,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 23:58:29,969 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:29,969 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:29,970 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:29,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:29,970 INFO L82 PathProgramCache]: Analyzing trace with hash -963709492, now seen corresponding path program 1 times [2019-10-14 23:58:29,970 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:29,971 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226569511] [2019-10-14 23:58:29,971 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:29,971 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:29,971 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:30,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:30,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:30,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226569511] [2019-10-14 23:58:30,248 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:30,249 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:30,249 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452859451] [2019-10-14 23:58:30,251 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:30,251 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:30,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:30,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:30,252 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-10-14 23:58:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:31,384 INFO L93 Difference]: Finished difference Result 2635 states and 4271 transitions. [2019-10-14 23:58:31,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:31,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 185 [2019-10-14 23:58:31,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:31,395 INFO L225 Difference]: With dead ends: 2635 [2019-10-14 23:58:31,395 INFO L226 Difference]: Without dead ends: 1742 [2019-10-14 23:58:31,398 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 23:58:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2019-10-14 23:58:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1737. [2019-10-14 23:58:31,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-10-14 23:58:31,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2653 transitions. [2019-10-14 23:58:31,449 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2653 transitions. Word has length 185 [2019-10-14 23:58:31,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:31,450 INFO L462 AbstractCegarLoop]: Abstraction has 1737 states and 2653 transitions. [2019-10-14 23:58:31,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:31,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2653 transitions. [2019-10-14 23:58:31,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-14 23:58:31,457 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:31,457 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:31,458 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:31,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:31,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1171011483, now seen corresponding path program 1 times [2019-10-14 23:58:31,459 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:31,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055543204] [2019-10-14 23:58:31,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:31,459 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:31,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:31,700 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055543204] [2019-10-14 23:58:31,700 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:31,701 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:31,701 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391063282] [2019-10-14 23:58:31,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:31,702 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:31,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:31,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:31,703 INFO L87 Difference]: Start difference. First operand 1737 states and 2653 transitions. Second operand 3 states. [2019-10-14 23:58:32,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:32,837 INFO L93 Difference]: Finished difference Result 5158 states and 8081 transitions. [2019-10-14 23:58:32,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:32,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 205 [2019-10-14 23:58:32,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:32,863 INFO L225 Difference]: With dead ends: 5158 [2019-10-14 23:58:32,863 INFO L226 Difference]: Without dead ends: 3427 [2019-10-14 23:58:32,869 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 23:58:32,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3427 states. [2019-10-14 23:58:32,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3427 to 3405. [2019-10-14 23:58:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3405 states. [2019-10-14 23:58:32,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3405 states to 3405 states and 5256 transitions. [2019-10-14 23:58:32,986 INFO L78 Accepts]: Start accepts. Automaton has 3405 states and 5256 transitions. Word has length 205 [2019-10-14 23:58:32,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:32,986 INFO L462 AbstractCegarLoop]: Abstraction has 3405 states and 5256 transitions. [2019-10-14 23:58:32,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 3405 states and 5256 transitions. [2019-10-14 23:58:32,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-14 23:58:32,999 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:32,999 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 23:58:33,000 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:33,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:33,000 INFO L82 PathProgramCache]: Analyzing trace with hash -128205864, now seen corresponding path program 1 times [2019-10-14 23:58:33,000 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:33,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903817221] [2019-10-14 23:58:33,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:33,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:33,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:33,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903817221] [2019-10-14 23:58:33,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:33,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:58:33,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270834106] [2019-10-14 23:58:33,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:58:33,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:33,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:58:33,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:33,310 INFO L87 Difference]: Start difference. First operand 3405 states and 5256 transitions. Second operand 7 states. [2019-10-14 23:58:35,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:35,844 INFO L93 Difference]: Finished difference Result 13875 states and 25633 transitions. [2019-10-14 23:58:35,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:58:35,845 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 250 [2019-10-14 23:58:35,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:35,944 INFO L225 Difference]: With dead ends: 13875 [2019-10-14 23:58:35,945 INFO L226 Difference]: Without dead ends: 10476 [2019-10-14 23:58:35,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:58:35,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10476 states. [2019-10-14 23:58:36,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10476 to 10288. [2019-10-14 23:58:36,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10288 states. [2019-10-14 23:58:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10288 states to 10288 states and 16830 transitions. [2019-10-14 23:58:36,396 INFO L78 Accepts]: Start accepts. Automaton has 10288 states and 16830 transitions. Word has length 250 [2019-10-14 23:58:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:36,397 INFO L462 AbstractCegarLoop]: Abstraction has 10288 states and 16830 transitions. [2019-10-14 23:58:36,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:58:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 10288 states and 16830 transitions. [2019-10-14 23:58:36,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2019-10-14 23:58:36,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:36,443 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:36,444 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:36,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:36,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1276991200, now seen corresponding path program 1 times [2019-10-14 23:58:36,444 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:36,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110246998] [2019-10-14 23:58:36,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:36,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:36,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:36,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110246998] [2019-10-14 23:58:36,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054681750] [2019-10-14 23:58:36,773 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 23:58:37,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:37,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 23:58:37,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:37,248 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:58:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:37,358 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:37,583 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:37,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [572973659] [2019-10-14 23:58:37,590 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 265 [2019-10-14 23:58:37,654 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:37,654 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)