/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:43:30,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:43:30,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:43:30,595 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:43:30,595 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:43:30,598 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:43:30,600 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:43:30,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:43:30,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:43:30,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:43:30,618 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:43:30,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:43:30,621 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:43:30,624 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:43:30,627 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:43:30,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:43:30,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:43:30,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:43:30,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:43:30,641 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:43:30,646 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:43:30,647 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:43:30,648 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:43:30,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:43:30,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:43:30,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:43:30,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:43:30,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:43:30,669 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:43:30,688 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:43:30,689 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:43:30,690 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:43:30,690 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:43:30,690 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:43:30,691 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:43:30,691 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:43:30,691 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:43:30,691 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:43:30,691 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:43:30,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:43:30,693 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:43:30,693 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:43:30,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:43:30,694 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:43:30,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:43:30,695 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:43:30,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:43:30,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:43:30,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:43:30,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:43:30,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:43:30,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:43:30,697 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:43:30,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:43:30,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:43:30,697 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:43:30,697 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:43:30,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:43:30,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:43:30,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:43:30,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:43:30,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:43:30,700 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:43:30,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:43:30,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:43:30,701 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:43:30,701 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:43:30,986 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:43:31,005 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:43:31,009 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:43:31,011 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:43:31,011 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:43:31,012 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2019-11-24 04:43:31,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275a300e/d47424e7d77a48d48660015cba7bd99c/FLAGb940f7c7c [2019-11-24 04:43:31,719 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:43:31,720 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/elevator_spec3_product01.cil.c [2019-11-24 04:43:31,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275a300e/d47424e7d77a48d48660015cba7bd99c/FLAGb940f7c7c [2019-11-24 04:43:31,957 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2275a300e/d47424e7d77a48d48660015cba7bd99c [2019-11-24 04:43:31,971 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:43:31,974 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:43:31,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:43:31,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:43:31,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:43:31,980 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:43:31" (1/1) ... [2019-11-24 04:43:31,984 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a86056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:31, skipping insertion in model container [2019-11-24 04:43:31,984 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:43:31" (1/1) ... [2019-11-24 04:43:31,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:43:32,070 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:43:32,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:43:32,791 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:43:32,962 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:43:33,047 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:43:33,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33 WrapperNode [2019-11-24 04:43:33,048 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:43:33,049 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:43:33,049 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:43:33,049 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:43:33,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,405 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:43:33,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:43:33,406 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:43:33,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:43:33,474 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (1/1) ... [2019-11-24 04:43:33,885 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:43:33,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:43:33,886 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:43:33,886 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:43:33,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (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 [2019-11-24 04:43:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:43:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:43:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:43:33,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:44:34,198 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:44:34,198 INFO L284 CfgBuilder]: Removed 1107 assume(true) statements. [2019-11-24 04:44:34,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:44:34 BoogieIcfgContainer [2019-11-24 04:44:34,201 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:44:34,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:44:34,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:44:34,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:44:34,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:43:31" (1/3) ... [2019-11-24 04:44:34,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2441c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:44:34, skipping insertion in model container [2019-11-24 04:44:34,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:43:33" (2/3) ... [2019-11-24 04:44:34,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f2441c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:44:34, skipping insertion in model container [2019-11-24 04:44:34,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:44:34" (3/3) ... [2019-11-24 04:44:34,213 INFO L109 eAbstractionObserver]: Analyzing ICFG elevator_spec3_product01.cil.c [2019-11-24 04:44:34,220 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:44:34,229 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2019-11-24 04:44:34,241 INFO L249 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2019-11-24 04:44:34,277 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:44:34,277 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:44:34,277 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:44:34,277 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:44:34,278 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:44:34,278 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:44:34,278 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:44:34,278 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:44:34,320 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states. [2019-11-24 04:44:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:44:34,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:34,330 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:34,330 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:34,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:34,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2046514469, now seen corresponding path program 1 times [2019-11-24 04:44:34,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:34,344 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693447254] [2019-11-24 04:44:34,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:34,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693447254] [2019-11-24 04:44:34,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:34,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:34,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552458746] [2019-11-24 04:44:34,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:34,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:34,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:34,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:34,856 INFO L87 Difference]: Start difference. First operand 1878 states. Second operand 3 states. [2019-11-24 04:44:35,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:35,104 INFO L93 Difference]: Finished difference Result 3735 states and 7195 transitions. [2019-11-24 04:44:35,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:35,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:44:35,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:35,142 INFO L225 Difference]: With dead ends: 3735 [2019-11-24 04:44:35,142 INFO L226 Difference]: Without dead ends: 1867 [2019-11-24 04:44:35,155 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2019-11-24 04:44:35,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1867. [2019-11-24 04:44:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1867 states. [2019-11-24 04:44:35,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 3583 transitions. [2019-11-24 04:44:35,298 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 3583 transitions. Word has length 15 [2019-11-24 04:44:35,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:35,298 INFO L462 AbstractCegarLoop]: Abstraction has 1867 states and 3583 transitions. [2019-11-24 04:44:35,299 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:35,299 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 3583 transitions. [2019-11-24 04:44:35,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:44:35,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:35,305 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:35,310 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash 639191555, now seen corresponding path program 1 times [2019-11-24 04:44:35,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:35,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715757534] [2019-11-24 04:44:35,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:35,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:35,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715757534] [2019-11-24 04:44:35,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:35,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:44:35,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052253581] [2019-11-24 04:44:35,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:44:35,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:35,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:44:35,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:44:35,440 INFO L87 Difference]: Start difference. First operand 1867 states and 3583 transitions. Second operand 4 states. [2019-11-24 04:44:36,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:36,916 INFO L93 Difference]: Finished difference Result 7028 states and 13442 transitions. [2019-11-24 04:44:36,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:44:36,916 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:44:36,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:36,946 INFO L225 Difference]: With dead ends: 7028 [2019-11-24 04:44:36,946 INFO L226 Difference]: Without dead ends: 5173 [2019-11-24 04:44:36,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:44:36,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2019-11-24 04:44:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 2469. [2019-11-24 04:44:37,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2019-11-24 04:44:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 4712 transitions. [2019-11-24 04:44:37,046 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 4712 transitions. Word has length 15 [2019-11-24 04:44:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:37,047 INFO L462 AbstractCegarLoop]: Abstraction has 2469 states and 4712 transitions. [2019-11-24 04:44:37,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:44:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 4712 transitions. [2019-11-24 04:44:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:44:37,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:37,048 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:37,049 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:37,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:37,049 INFO L82 PathProgramCache]: Analyzing trace with hash 373206646, now seen corresponding path program 1 times [2019-11-24 04:44:37,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:37,050 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974650099] [2019-11-24 04:44:37,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:37,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:37,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:37,127 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974650099] [2019-11-24 04:44:37,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:37,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:37,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076181758] [2019-11-24 04:44:37,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:37,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:37,129 INFO L87 Difference]: Start difference. First operand 2469 states and 4712 transitions. Second operand 3 states. [2019-11-24 04:44:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:37,381 INFO L93 Difference]: Finished difference Result 4933 states and 9418 transitions. [2019-11-24 04:44:37,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:37,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 04:44:37,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:37,399 INFO L225 Difference]: With dead ends: 4933 [2019-11-24 04:44:37,408 INFO L226 Difference]: Without dead ends: 2469 [2019-11-24 04:44:37,415 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2469 states. [2019-11-24 04:44:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2469 to 2469. [2019-11-24 04:44:37,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2469 states. [2019-11-24 04:44:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 4708 transitions. [2019-11-24 04:44:37,502 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 4708 transitions. Word has length 16 [2019-11-24 04:44:37,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:37,503 INFO L462 AbstractCegarLoop]: Abstraction has 2469 states and 4708 transitions. [2019-11-24 04:44:37,503 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:37,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 4708 transitions. [2019-11-24 04:44:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:44:37,504 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:37,505 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:37,505 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:37,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:37,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1000379214, now seen corresponding path program 1 times [2019-11-24 04:44:37,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:37,506 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166929907] [2019-11-24 04:44:37,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:37,621 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166929907] [2019-11-24 04:44:37,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:37,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:44:37,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187214364] [2019-11-24 04:44:37,622 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:44:37,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:37,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:44:37,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:44:37,623 INFO L87 Difference]: Start difference. First operand 2469 states and 4708 transitions. Second operand 4 states. [2019-11-24 04:44:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:38,166 INFO L93 Difference]: Finished difference Result 7285 states and 13872 transitions. [2019-11-24 04:44:38,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:44:38,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2019-11-24 04:44:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:38,202 INFO L225 Difference]: With dead ends: 7285 [2019-11-24 04:44:38,203 INFO L226 Difference]: Without dead ends: 5139 [2019-11-24 04:44:38,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:44:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5139 states. [2019-11-24 04:44:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5139 to 3393. [2019-11-24 04:44:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3393 states. [2019-11-24 04:44:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 6485 transitions. [2019-11-24 04:44:38,368 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 6485 transitions. Word has length 17 [2019-11-24 04:44:38,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:38,368 INFO L462 AbstractCegarLoop]: Abstraction has 3393 states and 6485 transitions. [2019-11-24 04:44:38,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:44:38,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 6485 transitions. [2019-11-24 04:44:38,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:44:38,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:38,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:38,370 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:38,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:38,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1437580006, now seen corresponding path program 1 times [2019-11-24 04:44:38,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:38,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441398402] [2019-11-24 04:44:38,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:38,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:38,456 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441398402] [2019-11-24 04:44:38,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:38,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:44:38,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575721043] [2019-11-24 04:44:38,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:44:38,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:38,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:44:38,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:38,458 INFO L87 Difference]: Start difference. First operand 3393 states and 6485 transitions. Second operand 3 states. [2019-11-24 04:44:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:42,156 INFO L93 Difference]: Finished difference Result 5962 states and 11355 transitions. [2019-11-24 04:44:42,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:44:42,156 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:44:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:42,175 INFO L225 Difference]: With dead ends: 5962 [2019-11-24 04:44:42,175 INFO L226 Difference]: Without dead ends: 3824 [2019-11-24 04:44:42,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:44:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2019-11-24 04:44:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3783. [2019-11-24 04:44:42,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2019-11-24 04:44:42,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6999 transitions. [2019-11-24 04:44:42,289 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6999 transitions. Word has length 17 [2019-11-24 04:44:42,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:42,290 INFO L462 AbstractCegarLoop]: Abstraction has 3783 states and 6999 transitions. [2019-11-24 04:44:42,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:44:42,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6999 transitions. [2019-11-24 04:44:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-24 04:44:42,291 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:42,291 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:44:42,292 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1870426702, now seen corresponding path program 1 times [2019-11-24 04:44:42,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:42,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710204566] [2019-11-24 04:44:42,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:42,423 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710204566] [2019-11-24 04:44:42,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:42,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:44:42,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187761032] [2019-11-24 04:44:42,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:44:42,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:42,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:44:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:44:42,425 INFO L87 Difference]: Start difference. First operand 3783 states and 6999 transitions. Second operand 5 states. [2019-11-24 04:44:43,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:43,609 INFO L93 Difference]: Finished difference Result 7927 states and 14632 transitions. [2019-11-24 04:44:43,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:44:43,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-24 04:44:43,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:43,643 INFO L225 Difference]: With dead ends: 7927 [2019-11-24 04:44:43,643 INFO L226 Difference]: Without dead ends: 5686 [2019-11-24 04:44:43,648 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:44:43,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2019-11-24 04:44:43,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3783. [2019-11-24 04:44:43,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2019-11-24 04:44:43,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6971 transitions. [2019-11-24 04:44:43,774 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6971 transitions. Word has length 20 [2019-11-24 04:44:43,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:43,775 INFO L462 AbstractCegarLoop]: Abstraction has 3783 states and 6971 transitions. [2019-11-24 04:44:43,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:44:43,775 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6971 transitions. [2019-11-24 04:44:43,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-24 04:44:43,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:43,776 INFO L410 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] [2019-11-24 04:44:43,776 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:43,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:43,777 INFO L82 PathProgramCache]: Analyzing trace with hash 422379615, now seen corresponding path program 1 times [2019-11-24 04:44:43,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:43,777 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002715601] [2019-11-24 04:44:43,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:43,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:43,859 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002715601] [2019-11-24 04:44:43,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:43,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:44:43,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385608419] [2019-11-24 04:44:43,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:44:43,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:43,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:44:43,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:44:43,861 INFO L87 Difference]: Start difference. First operand 3783 states and 6971 transitions. Second operand 5 states. [2019-11-24 04:44:44,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:44,899 INFO L93 Difference]: Finished difference Result 7457 states and 13660 transitions. [2019-11-24 04:44:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:44:44,900 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-24 04:44:44,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:44,914 INFO L225 Difference]: With dead ends: 7457 [2019-11-24 04:44:44,914 INFO L226 Difference]: Without dead ends: 4941 [2019-11-24 04:44:44,920 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:44:44,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4941 states. [2019-11-24 04:44:45,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4941 to 3783. [2019-11-24 04:44:45,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3783 states. [2019-11-24 04:44:45,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 6763 transitions. [2019-11-24 04:44:45,043 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 6763 transitions. Word has length 24 [2019-11-24 04:44:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:45,044 INFO L462 AbstractCegarLoop]: Abstraction has 3783 states and 6763 transitions. [2019-11-24 04:44:45,044 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:44:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 6763 transitions. [2019-11-24 04:44:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-24 04:44:45,045 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:45,045 INFO L410 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] [2019-11-24 04:44:45,045 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:45,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1332187924, now seen corresponding path program 1 times [2019-11-24 04:44:45,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:45,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154304434] [2019-11-24 04:44:45,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:45,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:45,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154304434] [2019-11-24 04:44:45,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:45,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:44:45,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604567762] [2019-11-24 04:44:45,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:44:45,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:45,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:44:45,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:44:45,139 INFO L87 Difference]: Start difference. First operand 3783 states and 6763 transitions. Second operand 5 states. [2019-11-24 04:44:46,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:44:46,049 INFO L93 Difference]: Finished difference Result 7258 states and 12957 transitions. [2019-11-24 04:44:46,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:44:46,050 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-11-24 04:44:46,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:44:46,064 INFO L225 Difference]: With dead ends: 7258 [2019-11-24 04:44:46,064 INFO L226 Difference]: Without dead ends: 4781 [2019-11-24 04:44:46,069 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-24 04:44:46,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4781 states. [2019-11-24 04:44:46,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4781 to 3626. [2019-11-24 04:44:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2019-11-24 04:44:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 6378 transitions. [2019-11-24 04:44:46,187 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 6378 transitions. Word has length 25 [2019-11-24 04:44:46,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:44:46,187 INFO L462 AbstractCegarLoop]: Abstraction has 3626 states and 6378 transitions. [2019-11-24 04:44:46,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:44:46,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 6378 transitions. [2019-11-24 04:44:46,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-24 04:44:46,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:44:46,188 INFO L410 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] [2019-11-24 04:44:46,188 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr8ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr7ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr6ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr9ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:44:46,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:44:46,189 INFO L82 PathProgramCache]: Analyzing trace with hash 776968751, now seen corresponding path program 1 times [2019-11-24 04:44:46,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:44:46,189 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019719906] [2019-11-24 04:44:46,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:44:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:44:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:44:46,291 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019719906] [2019-11-24 04:44:46,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:44:46,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 04:44:46,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451309202] [2019-11-24 04:44:46,292 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:44:46,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:44:46,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:44:46,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:44:46,292 INFO L87 Difference]: Start difference. First operand 3626 states and 6378 transitions. Second operand 6 states.