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/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:11:35,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:11:35,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:11:35,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:11:35,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:11:35,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:11:35,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:11:35,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:11:35,643 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:11:35,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:11:35,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:11:35,646 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:11:35,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:11:35,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:11:35,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:11:35,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:11:35,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:11:35,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:11:35,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:11:35,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:11:35,657 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:11:35,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:11:35,663 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:11:35,664 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:11:35,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:11:35,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:11:35,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:11:35,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:11:35,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:11:35,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:11:35,682 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:11:35,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:11:35,683 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:11:35,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:11:35,685 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:11:35,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:11:35,689 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 20:11:35,712 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:11:35,712 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:11:35,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:11:35,714 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:11:35,714 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:11:35,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:11:35,715 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:11:35,715 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:11:35,715 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:11:35,715 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:11:35,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:11:35,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:11:35,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:11:35,717 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:11:35,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:11:35,717 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:11:35,718 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:11:35,718 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:11:35,718 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:11:35,718 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:11:35,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:11:35,719 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:11:35,719 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:11:35,719 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:11:35,719 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:11:35,720 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:11:35,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:11:35,720 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:11:35,720 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 20:11:35,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:11:36,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:11:36,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:11:36,009 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:11:36,010 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:11:36,011 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-13 20:11:36,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/919603b02/7d2d757021c84ac8bc0eff860af62882/FLAGca7fced00 [2019-10-13 20:11:36,827 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:11:36,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-13 20:11:36,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/919603b02/7d2d757021c84ac8bc0eff860af62882/FLAGca7fced00 [2019-10-13 20:11:36,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/919603b02/7d2d757021c84ac8bc0eff860af62882 [2019-10-13 20:11:36,949 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:11:36,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:11:36,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:36,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:11:36,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:11:36,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:36" (1/1) ... [2019-10-13 20:11:36,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18910f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:36, skipping insertion in model container [2019-10-13 20:11:36,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:11:36" (1/1) ... [2019-10-13 20:11:36,967 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:11:37,082 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:11:38,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:38,414 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:11:38,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:11:38,927 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:11:38,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38 WrapperNode [2019-10-13 20:11:38,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:11:38,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:11:38,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:11:38,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:11:38,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:38,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:38,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:38,999 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:39,073 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:39,100 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:39,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (1/1) ... [2019-10-13 20:11:39,141 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:11:39,142 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:11:39,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:11:39,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:11:39,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (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 20:11:39,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:11:39,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:11:39,202 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:11:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:11:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:11:39,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:11:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:11:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:11:39,203 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:11:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:11:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:11:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:11:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:11:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:11:39,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:11:43,044 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:11:43,045 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:11:43,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:43 BoogieIcfgContainer [2019-10-13 20:11:43,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:11:43,055 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:11:43,055 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:11:43,058 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:11:43,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:11:36" (1/3) ... [2019-10-13 20:11:43,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1f2bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:43, skipping insertion in model container [2019-10-13 20:11:43,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:11:38" (2/3) ... [2019-10-13 20:11:43,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a1f2bda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:11:43, skipping insertion in model container [2019-10-13 20:11:43,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:11:43" (3/3) ... [2019-10-13 20:11:43,066 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-10-13 20:11:43,082 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:11:43,093 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:11:43,105 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:11:43,149 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:11:43,149 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:11:43,150 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:11:43,150 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:11:43,150 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:11:43,150 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:11:43,150 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:11:43,150 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:11:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 20:11:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 20:11:43,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:43,210 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] [2019-10-13 20:11:43,212 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:43,219 INFO L82 PathProgramCache]: Analyzing trace with hash 118737362, now seen corresponding path program 1 times [2019-10-13 20:11:43,230 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:43,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319252385] [2019-10-13 20:11:43,230 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:43,231 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:43,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:43,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:43,555 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 20:11:43,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319252385] [2019-10-13 20:11:43,557 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:43,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:11:43,558 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760532434] [2019-10-13 20:11:43,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:11:43,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:43,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:11:43,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:11:43,584 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-13 20:11:48,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:48,051 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-13 20:11:48,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:11:48,055 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2019-10-13 20:11:48,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:48,089 INFO L225 Difference]: With dead ends: 2248 [2019-10-13 20:11:48,089 INFO L226 Difference]: Without dead ends: 1412 [2019-10-13 20:11:48,103 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 [2019-10-13 20:11:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-13 20:11:48,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-13 20:11:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-13 20:11:48,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-13 20:11:48,270 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 69 [2019-10-13 20:11:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:48,273 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-13 20:11:48,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:11:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-13 20:11:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 20:11:48,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:48,294 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:48,294 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:48,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:48,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1328569434, now seen corresponding path program 1 times [2019-10-13 20:11:48,295 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:48,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882119478] [2019-10-13 20:11:48,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:48,298 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:48,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:48,609 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:48,609 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882119478] [2019-10-13 20:11:48,610 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:48,610 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:48,610 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68889267] [2019-10-13 20:11:48,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:48,612 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:48,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:48,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:48,613 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 6 states. [2019-10-13 20:11:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:54,011 INFO L93 Difference]: Finished difference Result 4291 states and 7809 transitions. [2019-10-13 20:11:54,011 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:54,011 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 157 [2019-10-13 20:11:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:54,034 INFO L225 Difference]: With dead ends: 4291 [2019-10-13 20:11:54,034 INFO L226 Difference]: Without dead ends: 2885 [2019-10-13 20:11:54,039 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 [2019-10-13 20:11:54,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-10-13 20:11:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2864. [2019-10-13 20:11:54,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-10-13 20:11:54,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4821 transitions. [2019-10-13 20:11:54,154 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4821 transitions. Word has length 157 [2019-10-13 20:11:54,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:54,157 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4821 transitions. [2019-10-13 20:11:54,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:54,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4821 transitions. [2019-10-13 20:11:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-10-13 20:11:54,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:54,166 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:54,166 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:54,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:54,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1960156325, now seen corresponding path program 1 times [2019-10-13 20:11:54,168 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:54,168 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279198998] [2019-10-13 20:11:54,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:54,169 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:54,169 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:54,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:54,560 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279198998] [2019-10-13 20:11:54,560 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:54,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:54,561 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939703459] [2019-10-13 20:11:54,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:54,562 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:54,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:54,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:54,562 INFO L87 Difference]: Start difference. First operand 2864 states and 4821 transitions. Second operand 6 states. [2019-10-13 20:11:59,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:11:59,534 INFO L93 Difference]: Finished difference Result 6538 states and 10942 transitions. [2019-10-13 20:11:59,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:11:59,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 204 [2019-10-13 20:11:59,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:11:59,560 INFO L225 Difference]: With dead ends: 6538 [2019-10-13 20:11:59,560 INFO L226 Difference]: Without dead ends: 3680 [2019-10-13 20:11:59,567 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 20:11:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2019-10-13 20:11:59,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 3624. [2019-10-13 20:11:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3624 states. [2019-10-13 20:11:59,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 5583 transitions. [2019-10-13 20:11:59,659 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 5583 transitions. Word has length 204 [2019-10-13 20:11:59,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:11:59,660 INFO L462 AbstractCegarLoop]: Abstraction has 3624 states and 5583 transitions. [2019-10-13 20:11:59,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:11:59,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 5583 transitions. [2019-10-13 20:11:59,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-13 20:11:59,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:11:59,664 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:59,664 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:11:59,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:11:59,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1938661825, now seen corresponding path program 1 times [2019-10-13 20:11:59,665 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:11:59,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441080638] [2019-10-13 20:11:59,665 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:59,665 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:11:59,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:11:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:11:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:11:59,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441080638] [2019-10-13 20:11:59,914 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:11:59,915 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:11:59,915 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762738468] [2019-10-13 20:11:59,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:11:59,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:11:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:11:59,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:11:59,917 INFO L87 Difference]: Start difference. First operand 3624 states and 5583 transitions. Second operand 6 states. [2019-10-13 20:12:04,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:04,734 INFO L93 Difference]: Finished difference Result 9481 states and 14567 transitions. [2019-10-13 20:12:04,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:12:04,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2019-10-13 20:12:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:04,764 INFO L225 Difference]: With dead ends: 9481 [2019-10-13 20:12:04,765 INFO L226 Difference]: Without dead ends: 5863 [2019-10-13 20:12:04,774 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 [2019-10-13 20:12:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5863 states. [2019-10-13 20:12:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5863 to 5821. [2019-10-13 20:12:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5821 states. [2019-10-13 20:12:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 7606 transitions. [2019-10-13 20:12:04,907 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 7606 transitions. Word has length 206 [2019-10-13 20:12:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:12:04,908 INFO L462 AbstractCegarLoop]: Abstraction has 5821 states and 7606 transitions. [2019-10-13 20:12:04,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:12:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 7606 transitions. [2019-10-13 20:12:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2019-10-13 20:12:04,913 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:12:04,914 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, 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, 1, 1, 1, 1, 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 20:12:04,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:12:04,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:12:04,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1498580902, now seen corresponding path program 1 times [2019-10-13 20:12:04,915 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:12:04,915 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246389812] [2019-10-13 20:12:04,916 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:04,916 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:12:04,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:12:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:12:05,151 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-13 20:12:05,152 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246389812] [2019-10-13 20:12:05,152 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:12:05,153 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:12:05,153 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634181606] [2019-10-13 20:12:05,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:12:05,156 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:12:05,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:12:05,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:12:05,157 INFO L87 Difference]: Start difference. First operand 5821 states and 7606 transitions. Second operand 4 states. [2019-10-13 20:12:12,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:12:12,089 INFO L93 Difference]: Finished difference Result 22350 states and 29870 transitions. [2019-10-13 20:12:12,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:12:12,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 263 [2019-10-13 20:12:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:12:12,159 INFO L225 Difference]: With dead ends: 22350 [2019-10-13 20:12:12,160 INFO L226 Difference]: Without dead ends: 16535 [2019-10-13 20:12:12,180 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:12:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16535 states.