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_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:58:18,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:58:18,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:58:18,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 23:58:18,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:58:18,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:58:18,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:58:18,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:58:18,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:58:18,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:58:18,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:58:18,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:58:18,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:58:18,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:58:18,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:58:18,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:58:18,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:58:18,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:58:18,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:58:18,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:58:18,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:58:18,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:58:18,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:58:18,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:58:18,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:58:18,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:58:18,921 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:58:18,923 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:58:18,924 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 23:58:18,944 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:58:18,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:58:18,946 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:58:18,946 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:58:18,946 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:58:18,947 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:58:18,947 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:58:18,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:58:18,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:58:18,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:58:18,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:58:18,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:58:18,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:58:18,948 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:58:18,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:58:18,948 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:58:18,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:58:18,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:58:18,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:58:18,949 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:58:18,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:58:18,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:58:18,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:58:18,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:58:18,950 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:58:18,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:58:18,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:58:18,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:58:18,951 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 23:58:19,232 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:58:19,245 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:58:19,248 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:58:19,250 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:58:19,250 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:58:19,251 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-14 23:58:19,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f487f2bdc/035be778cf124327ad458710f97a308e/FLAGfb63ae9ec [2019-10-14 23:58:20,015 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:58:20,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label13.c [2019-10-14 23:58:20,036 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f487f2bdc/035be778cf124327ad458710f97a308e/FLAGfb63ae9ec [2019-10-14 23:58:20,189 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f487f2bdc/035be778cf124327ad458710f97a308e [2019-10-14 23:58:20,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:58:20,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:58:20,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:20,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:58:20,206 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:58:20,207 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:20" (1/1) ... [2019-10-14 23:58:20,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77e35f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:20, skipping insertion in model container [2019-10-14 23:58:20,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:58:20" (1/1) ... [2019-10-14 23:58:20,217 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:58:20,285 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:58:21,165 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:21,173 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:58:21,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:58:21,491 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:58:21,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21 WrapperNode [2019-10-14 23:58:21,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:58:21,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:58:21,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:58:21,493 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:58:21,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,510 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,650 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (1/1) ... [2019-10-14 23:58:21,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:58:21,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:58:21,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:58:21,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:58:21,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (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 23:58:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:58:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:58:21,723 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:58:21,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:58:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:58:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:58:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:58:21,724 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:58:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:58:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:58:21,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:58:23,812 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:58:23,813 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:58:23,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:23 BoogieIcfgContainer [2019-10-14 23:58:23,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:58:23,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:58:23,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:58:23,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:58:23,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:58:20" (1/3) ... [2019-10-14 23:58:23,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e45afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:23, skipping insertion in model container [2019-10-14 23:58:23,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:58:21" (2/3) ... [2019-10-14 23:58:23,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e45afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:58:23, skipping insertion in model container [2019-10-14 23:58:23,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:58:23" (3/3) ... [2019-10-14 23:58:23,839 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label13.c [2019-10-14 23:58:23,852 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:58:23,866 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:58:23,879 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:58:23,927 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:58:23,928 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:58:23,929 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:58:23,929 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:58:23,930 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:58:23,930 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:58:23,930 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:58:23,930 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:58:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 23:58:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-14 23:58:23,991 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:23,993 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] [2019-10-14 23:58:23,995 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:24,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1944252984, now seen corresponding path program 1 times [2019-10-14 23:58:24,014 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:24,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392162899] [2019-10-14 23:58:24,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:24,015 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:24,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:24,792 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 23:58:24,793 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392162899] [2019-10-14 23:58:24,794 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:24,795 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:24,795 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846314224] [2019-10-14 23:58:24,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:24,803 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:24,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:24,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:24,826 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 3 states. [2019-10-14 23:58:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:26,234 INFO L93 Difference]: Finished difference Result 835 states and 1476 transitions. [2019-10-14 23:58:26,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:26,236 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-10-14 23:58:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:26,272 INFO L225 Difference]: With dead ends: 835 [2019-10-14 23:58:26,272 INFO L226 Difference]: Without dead ends: 462 [2019-10-14 23:58:26,283 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 23:58:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2019-10-14 23:58:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 460. [2019-10-14 23:58:26,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2019-10-14 23:58:26,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 739 transitions. [2019-10-14 23:58:26,395 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 739 transitions. Word has length 161 [2019-10-14 23:58:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:26,397 INFO L462 AbstractCegarLoop]: Abstraction has 460 states and 739 transitions. [2019-10-14 23:58:26,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:26,398 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 739 transitions. [2019-10-14 23:58:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-10-14 23:58:26,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:26,416 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] [2019-10-14 23:58:26,416 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1469747701, now seen corresponding path program 1 times [2019-10-14 23:58:26,417 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:26,417 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085989235] [2019-10-14 23:58:26,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:26,417 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:26,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:26,707 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 23:58:26,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085989235] [2019-10-14 23:58:26,708 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:26,708 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:26,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855803722] [2019-10-14 23:58:26,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:26,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:26,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:26,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:26,713 INFO L87 Difference]: Start difference. First operand 460 states and 739 transitions. Second operand 6 states. [2019-10-14 23:58:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:28,563 INFO L93 Difference]: Finished difference Result 1391 states and 2302 transitions. [2019-10-14 23:58:28,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:58:28,563 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 170 [2019-10-14 23:58:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:28,571 INFO L225 Difference]: With dead ends: 1391 [2019-10-14 23:58:28,571 INFO L226 Difference]: Without dead ends: 937 [2019-10-14 23:58:28,573 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 23:58:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2019-10-14 23:58:28,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 899. [2019-10-14 23:58:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-14 23:58:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1431 transitions. [2019-10-14 23:58:28,633 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1431 transitions. Word has length 170 [2019-10-14 23:58:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:28,633 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1431 transitions. [2019-10-14 23:58:28,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:28,633 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1431 transitions. [2019-10-14 23:58:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 23:58:28,638 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:28,638 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] [2019-10-14 23:58:28,639 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:28,639 INFO L82 PathProgramCache]: Analyzing trace with hash 931269084, now seen corresponding path program 1 times [2019-10-14 23:58:28,639 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:28,640 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353513528] [2019-10-14 23:58:28,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:28,640 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:28,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:28,889 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 23:58:28,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353513528] [2019-10-14 23:58:28,890 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:28,891 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:28,891 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214738611] [2019-10-14 23:58:28,893 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:28,893 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:28,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:28,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:28,894 INFO L87 Difference]: Start difference. First operand 899 states and 1431 transitions. Second operand 3 states. [2019-10-14 23:58:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:30,247 INFO L93 Difference]: Finished difference Result 2635 states and 4271 transitions. [2019-10-14 23:58:30,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:30,249 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-14 23:58:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:30,259 INFO L225 Difference]: With dead ends: 2635 [2019-10-14 23:58:30,259 INFO L226 Difference]: Without dead ends: 1742 [2019-10-14 23:58:30,262 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 23:58:30,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1742 states. [2019-10-14 23:58:30,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1742 to 1737. [2019-10-14 23:58:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1737 states. [2019-10-14 23:58:30,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1737 states to 1737 states and 2653 transitions. [2019-10-14 23:58:30,316 INFO L78 Accepts]: Start accepts. Automaton has 1737 states and 2653 transitions. Word has length 173 [2019-10-14 23:58:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:30,317 INFO L462 AbstractCegarLoop]: Abstraction has 1737 states and 2653 transitions. [2019-10-14 23:58:30,317 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:30,317 INFO L276 IsEmpty]: Start isEmpty. Operand 1737 states and 2653 transitions. [2019-10-14 23:58:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-14 23:58:30,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:30,324 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] [2019-10-14 23:58:30,324 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:30,325 INFO L82 PathProgramCache]: Analyzing trace with hash 800082475, now seen corresponding path program 1 times [2019-10-14 23:58:30,325 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:30,325 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841008524] [2019-10-14 23:58:30,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:30,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:30,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:30,535 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 23:58:30,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841008524] [2019-10-14 23:58:30,536 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:30,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:58:30,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307179719] [2019-10-14 23:58:30,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:30,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:30,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:58:30,538 INFO L87 Difference]: Start difference. First operand 1737 states and 2653 transitions. Second operand 3 states. [2019-10-14 23:58:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:31,733 INFO L93 Difference]: Finished difference Result 5148 states and 8066 transitions. [2019-10-14 23:58:31,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:31,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 193 [2019-10-14 23:58:31,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:31,754 INFO L225 Difference]: With dead ends: 5148 [2019-10-14 23:58:31,754 INFO L226 Difference]: Without dead ends: 3417 [2019-10-14 23:58:31,760 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 23:58:31,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2019-10-14 23:58:31,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3415. [2019-10-14 23:58:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3415 states. [2019-10-14 23:58:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 5080 transitions. [2019-10-14 23:58:31,871 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 5080 transitions. Word has length 193 [2019-10-14 23:58:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:31,872 INFO L462 AbstractCegarLoop]: Abstraction has 3415 states and 5080 transitions. [2019-10-14 23:58:31,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 5080 transitions. [2019-10-14 23:58:31,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 23:58:31,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:31,883 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:31,884 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:31,884 INFO L82 PathProgramCache]: Analyzing trace with hash -16680445, now seen corresponding path program 1 times [2019-10-14 23:58:31,884 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:31,885 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222052193] [2019-10-14 23:58:31,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:31,885 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:31,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:32,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222052193] [2019-10-14 23:58:32,032 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:32,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:32,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179964663] [2019-10-14 23:58:32,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:32,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:32,034 INFO L87 Difference]: Start difference. First operand 3415 states and 5080 transitions. Second operand 6 states. [2019-10-14 23:58:33,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:33,585 INFO L93 Difference]: Finished difference Result 8666 states and 13711 transitions. [2019-10-14 23:58:33,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:33,585 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 198 [2019-10-14 23:58:33,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:33,618 INFO L225 Difference]: With dead ends: 8666 [2019-10-14 23:58:33,618 INFO L226 Difference]: Without dead ends: 5257 [2019-10-14 23:58:33,632 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 23:58:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5257 states. [2019-10-14 23:58:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5257 to 5185. [2019-10-14 23:58:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2019-10-14 23:58:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 6866 transitions. [2019-10-14 23:58:33,804 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 6866 transitions. Word has length 198 [2019-10-14 23:58:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:33,805 INFO L462 AbstractCegarLoop]: Abstraction has 5185 states and 6866 transitions. [2019-10-14 23:58:33,805 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 6866 transitions. [2019-10-14 23:58:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-14 23:58:33,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:33,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:33,822 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:33,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:33,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1873113638, now seen corresponding path program 1 times [2019-10-14 23:58:33,823 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:33,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831016000] [2019-10-14 23:58:33,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:33,824 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:33,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:34,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831016000] [2019-10-14 23:58:34,098 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:58:34,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:58:34,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994882120] [2019-10-14 23:58:34,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:58:34,100 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:58:34,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:58:34,103 INFO L87 Difference]: Start difference. First operand 5185 states and 6866 transitions. Second operand 6 states. [2019-10-14 23:58:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:35,561 INFO L93 Difference]: Finished difference Result 10468 states and 14252 transitions. [2019-10-14 23:58:35,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:58:35,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 219 [2019-10-14 23:58:35,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:35,590 INFO L225 Difference]: With dead ends: 10468 [2019-10-14 23:58:35,590 INFO L226 Difference]: Without dead ends: 5289 [2019-10-14 23:58:35,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:58:35,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2019-10-14 23:58:35,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5231. [2019-10-14 23:58:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5231 states. [2019-10-14 23:58:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 6715 transitions. [2019-10-14 23:58:35,780 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 6715 transitions. Word has length 219 [2019-10-14 23:58:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:35,781 INFO L462 AbstractCegarLoop]: Abstraction has 5231 states and 6715 transitions. [2019-10-14 23:58:35,781 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:58:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 6715 transitions. [2019-10-14 23:58:35,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2019-10-14 23:58:35,801 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:35,805 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:35,805 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1714721478, now seen corresponding path program 1 times [2019-10-14 23:58:35,806 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:35,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176766100] [2019-10-14 23:58:35,808 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:35,809 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:35,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:58:36,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176766100] [2019-10-14 23:58:36,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345129577] [2019-10-14 23:58:36,176 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 23:58:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:36,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:36,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:36,572 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:36,683 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:36,684 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:58:36,684 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2019-10-14 23:58:36,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809002794] [2019-10-14 23:58:36,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:58:36,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:58:36,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:58:36,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:36,687 INFO L87 Difference]: Start difference. First operand 5231 states and 6715 transitions. Second operand 3 states. [2019-10-14 23:58:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:58:37,904 INFO L93 Difference]: Finished difference Result 15515 states and 20303 transitions. [2019-10-14 23:58:37,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:58:37,914 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 231 [2019-10-14 23:58:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:58:37,962 INFO L225 Difference]: With dead ends: 15515 [2019-10-14 23:58:37,963 INFO L226 Difference]: Without dead ends: 10290 [2019-10-14 23:58:37,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 460 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:58:37,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10290 states. [2019-10-14 23:58:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10290 to 10265. [2019-10-14 23:58:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10265 states. [2019-10-14 23:58:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10265 states to 10265 states and 13454 transitions. [2019-10-14 23:58:38,263 INFO L78 Accepts]: Start accepts. Automaton has 10265 states and 13454 transitions. Word has length 231 [2019-10-14 23:58:38,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:58:38,264 INFO L462 AbstractCegarLoop]: Abstraction has 10265 states and 13454 transitions. [2019-10-14 23:58:38,264 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:58:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 10265 states and 13454 transitions. [2019-10-14 23:58:38,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 23:58:38,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:58:38,295 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:58:38,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:58:38,500 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:58:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:58:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -688510333, now seen corresponding path program 1 times [2019-10-14 23:58:38,501 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:58:38,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257681244] [2019-10-14 23:58:38,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:38,502 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:58:38,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:58:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 23:58:38,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257681244] [2019-10-14 23:58:38,706 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243984386] [2019-10-14 23:58:38,706 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 [2019-10-14 23:58:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:58:39,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:58:39,031 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:58:39,258 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:39,258 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:58:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 97 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 23:58:39,382 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1091552400] [2019-10-14 23:58:39,389 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 235 [2019-10-14 23:58:39,453 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:58:39,453 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)