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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:10:24,993 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:10:24,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:10:25,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:10:25,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:10:25,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:10:25,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:10:25,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:10:25,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:10:25,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:10:25,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:10:25,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:10:25,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:10:25,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:10:25,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:10:25,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:10:25,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:10:25,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:10:25,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:10:25,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:10:25,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:10:25,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:10:25,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:10:25,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:10:25,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:10:25,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:10:25,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:10:25,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:10:25,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:10:25,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:10:25,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:10:25,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:10:25,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:10:25,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:10:25,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:10:25,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:10:25,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:10:25,070 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:10:25,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:10:25,071 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:10:25,072 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:10:25,072 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:10:25,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:10:25,072 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:10:25,072 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:10:25,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:10:25,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:10:25,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:10:25,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:10:25,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:10:25,075 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:10:25,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:10:25,076 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:10:25,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:10:25,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:10:25,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:10:25,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:10:25,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:10:25,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:25,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:10:25,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:10:25,077 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:10:25,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:10:25,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:10:25,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:10:25,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:10:25,420 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:10:25,446 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:10:25,450 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:10:25,452 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:10:25,452 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:10:25,453 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-13 20:10:25,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d473b7afe/2928badbacd94323ab063f1f1aac5292/FLAG79173f5a2 [2019-10-13 20:10:26,194 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:10:26,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label55.c [2019-10-13 20:10:26,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d473b7afe/2928badbacd94323ab063f1f1aac5292/FLAG79173f5a2 [2019-10-13 20:10:26,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d473b7afe/2928badbacd94323ab063f1f1aac5292 [2019-10-13 20:10:26,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:10:26,423 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:10:26,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:26,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:10:26,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:10:26,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:26" (1/1) ... [2019-10-13 20:10:26,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ee01de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:26, skipping insertion in model container [2019-10-13 20:10:26,433 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:26" (1/1) ... [2019-10-13 20:10:26,441 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:10:26,512 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:10:27,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:27,455 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:10:27,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:10:27,798 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:10:27,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27 WrapperNode [2019-10-13 20:10:27,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:10:27,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:10:27,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:10:27,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:10:27,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,845 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,846 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,919 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... [2019-10-13 20:10:27,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:10:27,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:10:27,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:10:27,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:10:27,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:10:28,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:10:28,060 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:10:28,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:10:28,060 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:10:28,060 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:10:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:10:28,061 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:10:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:10:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:10:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:10:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:10:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:10:28,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:10:30,571 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:10:30,571 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:10:30,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:30 BoogieIcfgContainer [2019-10-13 20:10:30,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:10:30,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:10:30,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:10:30,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:10:30,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:26" (1/3) ... [2019-10-13 20:10:30,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f63533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:30, skipping insertion in model container [2019-10-13 20:10:30,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:27" (2/3) ... [2019-10-13 20:10:30,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59f63533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:30, skipping insertion in model container [2019-10-13 20:10:30,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:30" (3/3) ... [2019-10-13 20:10:30,597 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label55.c [2019-10-13 20:10:30,609 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:10:30,620 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:10:30,632 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:10:30,676 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:10:30,676 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:10:30,676 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:10:30,677 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:10:30,677 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:10:30,677 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:10:30,677 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:10:30,677 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:10:30,714 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 20:10:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 20:10:30,722 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:30,722 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] [2019-10-13 20:10:30,724 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:30,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1859248590, now seen corresponding path program 1 times [2019-10-13 20:10:30,736 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:30,736 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426225056] [2019-10-13 20:10:30,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:30,737 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:30,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:31,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426225056] [2019-10-13 20:10:31,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:31,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:10:31,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819031947] [2019-10-13 20:10:31,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:10:31,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:31,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:10:31,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:10:31,190 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-13 20:10:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:33,645 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-10-13 20:10:33,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:10:33,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-10-13 20:10:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:33,675 INFO L225 Difference]: With dead ends: 1153 [2019-10-13 20:10:33,675 INFO L226 Difference]: Without dead ends: 682 [2019-10-13 20:10:33,684 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:10:33,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-13 20:10:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-13 20:10:33,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-13 20:10:33,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1190 transitions. [2019-10-13 20:10:33,800 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1190 transitions. Word has length 63 [2019-10-13 20:10:33,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:33,801 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1190 transitions. [2019-10-13 20:10:33,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:10:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1190 transitions. [2019-10-13 20:10:33,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-13 20:10:33,808 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:33,809 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:10:33,809 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:33,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:33,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1824970078, now seen corresponding path program 1 times [2019-10-13 20:10:33,810 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:33,810 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401322597] [2019-10-13 20:10:33,810 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:33,811 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:33,811 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:34,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401322597] [2019-10-13 20:10:34,088 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:10:34,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:10:34,089 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424291594] [2019-10-13 20:10:34,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:10:34,091 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:34,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:10:34,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:10:34,092 INFO L87 Difference]: Start difference. First operand 682 states and 1190 transitions. Second operand 6 states. [2019-10-13 20:10:36,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:36,893 INFO L93 Difference]: Finished difference Result 1730 states and 3016 transitions. [2019-10-13 20:10:36,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:36,894 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 155 [2019-10-13 20:10:36,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:36,903 INFO L225 Difference]: With dead ends: 1730 [2019-10-13 20:10:36,903 INFO L226 Difference]: Without dead ends: 1054 [2019-10-13 20:10:36,906 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 [2019-10-13 20:10:36,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2019-10-13 20:10:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1034. [2019-10-13 20:10:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2019-10-13 20:10:36,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 1692 transitions. [2019-10-13 20:10:36,952 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 1692 transitions. Word has length 155 [2019-10-13 20:10:36,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:36,953 INFO L462 AbstractCegarLoop]: Abstraction has 1034 states and 1692 transitions. [2019-10-13 20:10:36,953 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:10:36,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 1692 transitions. [2019-10-13 20:10:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-10-13 20:10:36,960 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:36,961 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:10:36,961 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:36,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1909961266, now seen corresponding path program 1 times [2019-10-13 20:10:36,962 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:36,962 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818352490] [2019-10-13 20:10:36,962 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:36,963 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:36,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:37,305 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:37,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818352490] [2019-10-13 20:10:37,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110760773] [2019-10-13 20:10:37,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:37,426 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:37,440 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-13 20:10:37,598 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:37,812 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 112 proven. 88 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:10:37,814 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:37,814 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:37,814 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59690064] [2019-10-13 20:10:37,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:37,820 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:37,828 INFO L87 Difference]: Start difference. First operand 1034 states and 1692 transitions. Second operand 5 states. [2019-10-13 20:10:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:41,158 INFO L93 Difference]: Finished difference Result 2427 states and 3968 transitions. [2019-10-13 20:10:41,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:10:41,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 265 [2019-10-13 20:10:41,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:41,170 INFO L225 Difference]: With dead ends: 2427 [2019-10-13 20:10:41,171 INFO L226 Difference]: Without dead ends: 1399 [2019-10-13 20:10:41,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 525 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:41,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2019-10-13 20:10:41,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1388. [2019-10-13 20:10:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1388 states. [2019-10-13 20:10:41,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 2182 transitions. [2019-10-13 20:10:41,230 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 2182 transitions. Word has length 265 [2019-10-13 20:10:41,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:41,231 INFO L462 AbstractCegarLoop]: Abstraction has 1388 states and 2182 transitions. [2019-10-13 20:10:41,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:41,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 2182 transitions. [2019-10-13 20:10:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2019-10-13 20:10:41,244 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:41,245 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, 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, 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] [2019-10-13 20:10:41,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:41,461 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:41,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:41,461 INFO L82 PathProgramCache]: Analyzing trace with hash -495791769, now seen corresponding path program 1 times [2019-10-13 20:10:41,462 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:41,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186616680] [2019-10-13 20:10:41,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:41,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:41,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 168 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:41,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186616680] [2019-10-13 20:10:41,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742462656] [2019-10-13 20:10:41,801 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:41,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:41,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-10-13 20:10:42,076 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 168 proven. 142 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:42,261 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:42,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-13 20:10:42,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069293306] [2019-10-13 20:10:42,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:42,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:42,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-13 20:10:42,263 INFO L87 Difference]: Start difference. First operand 1388 states and 2182 transitions. Second operand 5 states. [2019-10-13 20:10:45,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:45,478 INFO L93 Difference]: Finished difference Result 4241 states and 6810 transitions. [2019-10-13 20:10:45,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:10:45,491 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 340 [2019-10-13 20:10:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:45,511 INFO L225 Difference]: With dead ends: 4241 [2019-10-13 20:10:45,512 INFO L226 Difference]: Without dead ends: 2859 [2019-10-13 20:10:45,517 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 689 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:10:45,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2019-10-13 20:10:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2819. [2019-10-13 20:10:45,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2819 states. [2019-10-13 20:10:45,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 4287 transitions. [2019-10-13 20:10:45,633 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 4287 transitions. Word has length 340 [2019-10-13 20:10:45,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:45,634 INFO L462 AbstractCegarLoop]: Abstraction has 2819 states and 4287 transitions. [2019-10-13 20:10:45,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:45,634 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 4287 transitions. [2019-10-13 20:10:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-10-13 20:10:45,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:45,646 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, 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, 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] [2019-10-13 20:10:45,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:45,853 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1063616465, now seen corresponding path program 1 times [2019-10-13 20:10:45,854 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:45,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978571623] [2019-10-13 20:10:45,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:45,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:45,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 168 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:46,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978571623] [2019-10-13 20:10:46,175 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133475006] [2019-10-13 20:10:46,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:46,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:10:46,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 212 proven. 0 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2019-10-13 20:10:46,438 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:46,697 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 168 proven. 150 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 20:10:46,697 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:10:46,698 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-13 20:10:46,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24117947] [2019-10-13 20:10:46,699 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:10:46,699 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:10:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:10:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:10:46,700 INFO L87 Difference]: Start difference. First operand 2819 states and 4287 transitions. Second operand 5 states. [2019-10-13 20:10:49,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:10:49,518 INFO L93 Difference]: Finished difference Result 8487 states and 13372 transitions. [2019-10-13 20:10:49,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 20:10:49,523 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 344 [2019-10-13 20:10:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:10:49,554 INFO L225 Difference]: With dead ends: 8487 [2019-10-13 20:10:49,554 INFO L226 Difference]: Without dead ends: 5674 [2019-10-13 20:10:49,564 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 683 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 20:10:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2019-10-13 20:10:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 5640. [2019-10-13 20:10:49,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5640 states. [2019-10-13 20:10:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5640 states to 5640 states and 7783 transitions. [2019-10-13 20:10:49,716 INFO L78 Accepts]: Start accepts. Automaton has 5640 states and 7783 transitions. Word has length 344 [2019-10-13 20:10:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:10:49,717 INFO L462 AbstractCegarLoop]: Abstraction has 5640 states and 7783 transitions. [2019-10-13 20:10:49,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:10:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5640 states and 7783 transitions. [2019-10-13 20:10:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2019-10-13 20:10:49,728 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:10:49,728 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 20:10:49,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:49,942 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:10:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:10:49,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1181974966, now seen corresponding path program 1 times [2019-10-13 20:10:49,942 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:10:49,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126834070] [2019-10-13 20:10:49,942 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:49,943 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:10:49,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:10:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:51,052 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:51,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126834070] [2019-10-13 20:10:51,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524536649] [2019-10-13 20:10:51,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:10:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:10:51,174 INFO L256 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:10:51,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:10:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:51,404 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:10:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 201 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:10:51,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [771941750] [2019-10-13 20:10:51,722 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 370 [2019-10-13 20:10:51,783 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:10:51,784 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:10:56,252 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.