/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/email_spec27_product13.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:56:03,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:56:03,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:56:03,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:56:03,681 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:56:03,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:56:03,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:56:03,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:56:03,689 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:56:03,690 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:56:03,691 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:56:03,692 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:56:03,692 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:56:03,693 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:56:03,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:56:03,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:56:03,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:56:03,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:56:03,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:56:03,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:56:03,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:56:03,704 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:56:03,705 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:56:03,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:56:03,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 04:56:03,709 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 04:56:03,709 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 04:56:03,710 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 04:56:03,711 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 04:56:03,712 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 04:56:03,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 04:56:03,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 04:56:03,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 04:56:03,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 04:56:03,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 04:56:03,718 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 04:56:03,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 04:56:03,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 04:56:03,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:56:03,723 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:56:03,724 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:56:03,725 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 04:56:03,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:56:03,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:56:03,751 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:56:03,751 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:56:03,751 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:56:03,751 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:56:03,752 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:56:03,752 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:56:03,752 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:56:03,752 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:56:03,752 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:56:03,753 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:56:03,753 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:56:03,753 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:56:03,753 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:56:03,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:56:03,754 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:56:03,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:56:03,755 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:56:03,755 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:56:03,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:56:03,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:56:03,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:56:03,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:56:03,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:56:03,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:56:03,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:56:03,756 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:56:03,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:56:03,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:56:03,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:56:03,757 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:56:03,757 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:56:03,758 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:56:03,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:56:03,758 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:56:03,758 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:56:03,758 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:56:04,053 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:56:04,067 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:56:04,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:56:04,071 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:56:04,072 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:56:04,072 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec27_product13.cil.c [2019-11-24 04:56:04,140 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2093b6dbd/48a85240bedd48078ee827a2c161a7f6/FLAG42ea8a092 [2019-11-24 04:56:04,799 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:56:04,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec27_product13.cil.c [2019-11-24 04:56:04,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2093b6dbd/48a85240bedd48078ee827a2c161a7f6/FLAG42ea8a092 [2019-11-24 04:56:04,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2093b6dbd/48a85240bedd48078ee827a2c161a7f6 [2019-11-24 04:56:05,003 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:56:05,005 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:56:05,006 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:56:05,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:56:05,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:56:05,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:56:04" (1/1) ... [2019-11-24 04:56:05,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b01c937 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:05, skipping insertion in model container [2019-11-24 04:56:05,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:56:04" (1/1) ... [2019-11-24 04:56:05,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:56:05,098 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:56:05,791 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:56:05,817 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:56:05,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:56:06,098 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:56:06,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06 WrapperNode [2019-11-24 04:56:06,099 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:56:06,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:56:06,100 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:56:06,100 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:56:06,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,142 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:56:06,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:56:06,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:56:06,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:56:06,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,245 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,313 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (1/1) ... [2019-11-24 04:56:06,325 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:56:06,326 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:56:06,326 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:56:06,326 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:56:06,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (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 04:56:06,436 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 04:56:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 04:56:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 04:56:06,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:56:06,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:56:12,625 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:56:12,625 INFO L284 CfgBuilder]: Removed 239 assume(true) statements. [2019-11-24 04:56:12,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:56:12 BoogieIcfgContainer [2019-11-24 04:56:12,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:56:12,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:56:12,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:56:12,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:56:12,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:56:04" (1/3) ... [2019-11-24 04:56:12,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594adc7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:56:12, skipping insertion in model container [2019-11-24 04:56:12,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:56:06" (2/3) ... [2019-11-24 04:56:12,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594adc7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:56:12, skipping insertion in model container [2019-11-24 04:56:12,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:56:12" (3/3) ... [2019-11-24 04:56:12,644 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec27_product13.cil.c [2019-11-24 04:56:12,655 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:56:12,667 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 04:56:12,681 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 04:56:12,715 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:56:12,715 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:56:12,715 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:56:12,715 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:56:12,715 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:56:12,715 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:56:12,716 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:56:12,716 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:56:12,736 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 04:56:12,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:56:12,750 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:12,751 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:12,752 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:12,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:12,760 INFO L82 PathProgramCache]: Analyzing trace with hash -101988749, now seen corresponding path program 1 times [2019-11-24 04:56:12,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:12,771 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781798925] [2019-11-24 04:56:12,771 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:13,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:13,144 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 04:56:13,145 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781798925] [2019-11-24 04:56:13,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:13,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:56:13,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816754610] [2019-11-24 04:56:13,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:56:13,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:56:13,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:56:13,170 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 04:56:13,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:13,197 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 04:56:13,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:56:13,199 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 04:56:13,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:13,212 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:56:13,212 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 04:56:13,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:56:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 04:56:13,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 04:56:13,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 04:56:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 04:56:13,253 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 04:56:13,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:13,254 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 04:56:13,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:56:13,254 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 04:56:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:56:13,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:13,255 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:13,255 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:13,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:13,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1493973020, now seen corresponding path program 1 times [2019-11-24 04:56:13,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:13,256 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609527628] [2019-11-24 04:56:13,256 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:13,381 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 04:56:13,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609527628] [2019-11-24 04:56:13,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:13,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:13,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488798322] [2019-11-24 04:56:13,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:56:13,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:13,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:56:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:56:13,386 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 04:56:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:13,410 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 04:56:13,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:56:13,411 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 04:56:13,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:13,412 INFO L225 Difference]: With dead ends: 50 [2019-11-24 04:56:13,412 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 04:56:13,413 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 04:56:13,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 04:56:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 04:56:13,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 04:56:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 04:56:13,429 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 04:56:13,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:13,429 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 04:56:13,430 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:56:13,430 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 04:56:13,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 04:56:13,432 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:13,433 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:13,433 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1802005440, now seen corresponding path program 1 times [2019-11-24 04:56:13,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:13,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356235693] [2019-11-24 04:56:13,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:13,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:56:13,807 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356235693] [2019-11-24 04:56:13,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:13,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:56:13,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473041096] [2019-11-24 04:56:13,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:56:13,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:13,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:56:13,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:56:13,810 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 5 states. [2019-11-24 04:56:14,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:14,073 INFO L93 Difference]: Finished difference Result 76 states and 122 transitions. [2019-11-24 04:56:14,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:56:14,076 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-11-24 04:56:14,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:14,077 INFO L225 Difference]: With dead ends: 76 [2019-11-24 04:56:14,077 INFO L226 Difference]: Without dead ends: 67 [2019-11-24 04:56:14,079 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:56:14,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-24 04:56:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-24 04:56:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-24 04:56:14,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 111 transitions. [2019-11-24 04:56:14,092 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 111 transitions. Word has length 12 [2019-11-24 04:56:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:14,092 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 111 transitions. [2019-11-24 04:56:14,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:56:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 111 transitions. [2019-11-24 04:56:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:56:14,093 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:14,094 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:14,094 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:14,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -734012653, now seen corresponding path program 1 times [2019-11-24 04:56:14,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:14,095 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989083284] [2019-11-24 04:56:14,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:14,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-24 04:56:14,223 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989083284] [2019-11-24 04:56:14,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:14,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:14,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405427684] [2019-11-24 04:56:14,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:56:14,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:14,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:56:14,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:56:14,225 INFO L87 Difference]: Start difference. First operand 65 states and 111 transitions. Second operand 4 states. [2019-11-24 04:56:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:14,253 INFO L93 Difference]: Finished difference Result 65 states and 111 transitions. [2019-11-24 04:56:14,254 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:56:14,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-24 04:56:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:14,255 INFO L225 Difference]: With dead ends: 65 [2019-11-24 04:56:14,255 INFO L226 Difference]: Without dead ends: 57 [2019-11-24 04:56:14,256 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 04:56:14,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-24 04:56:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-11-24 04:56:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-24 04:56:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 97 transitions. [2019-11-24 04:56:14,268 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 97 transitions. Word has length 15 [2019-11-24 04:56:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:14,270 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 97 transitions. [2019-11-24 04:56:14,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:56:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 97 transitions. [2019-11-24 04:56:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 04:56:14,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:14,271 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:14,271 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:14,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1673977756, now seen corresponding path program 1 times [2019-11-24 04:56:14,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:14,272 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603864242] [2019-11-24 04:56:14,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:14,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:14,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:14,379 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603864242] [2019-11-24 04:56:14,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:14,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:14,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590168829] [2019-11-24 04:56:14,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:56:14,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:14,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:56:14,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:56:14,382 INFO L87 Difference]: Start difference. First operand 55 states and 97 transitions. Second operand 3 states. [2019-11-24 04:56:14,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:14,410 INFO L93 Difference]: Finished difference Result 159 states and 283 transitions. [2019-11-24 04:56:14,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:56:14,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 04:56:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:14,417 INFO L225 Difference]: With dead ends: 159 [2019-11-24 04:56:14,417 INFO L226 Difference]: Without dead ends: 106 [2019-11-24 04:56:14,418 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 04:56:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-24 04:56:14,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2019-11-24 04:56:14,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-24 04:56:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 182 transitions. [2019-11-24 04:56:14,451 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 182 transitions. Word has length 15 [2019-11-24 04:56:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:14,455 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 182 transitions. [2019-11-24 04:56:14,455 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:56:14,455 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 182 transitions. [2019-11-24 04:56:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:56:14,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:14,457 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:14,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:14,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash 868536391, now seen corresponding path program 1 times [2019-11-24 04:56:14,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:14,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092321402] [2019-11-24 04:56:14,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:14,562 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092321402] [2019-11-24 04:56:14,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:14,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553807748] [2019-11-24 04:56:14,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:56:14,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:14,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:56:14,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:56:14,566 INFO L87 Difference]: Start difference. First operand 101 states and 182 transitions. Second operand 3 states. [2019-11-24 04:56:14,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:14,598 INFO L93 Difference]: Finished difference Result 295 states and 534 transitions. [2019-11-24 04:56:14,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:56:14,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 04:56:14,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:14,603 INFO L225 Difference]: With dead ends: 295 [2019-11-24 04:56:14,603 INFO L226 Difference]: Without dead ends: 196 [2019-11-24 04:56:14,605 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 04:56:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2019-11-24 04:56:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 191. [2019-11-24 04:56:14,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-11-24 04:56:14,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 346 transitions. [2019-11-24 04:56:14,650 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 346 transitions. Word has length 16 [2019-11-24 04:56:14,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:14,650 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 346 transitions. [2019-11-24 04:56:14,650 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:56:14,651 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 346 transitions. [2019-11-24 04:56:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:56:14,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:14,658 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:14,658 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:14,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:14,662 INFO L82 PathProgramCache]: Analyzing trace with hash 925622454, now seen corresponding path program 1 times [2019-11-24 04:56:14,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:14,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778363447] [2019-11-24 04:56:14,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:14,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:14,762 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778363447] [2019-11-24 04:56:14,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:56:14,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:56:14,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993864386] [2019-11-24 04:56:14,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:56:14,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:56:14,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:56:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:56:14,767 INFO L87 Difference]: Start difference. First operand 191 states and 346 transitions. Second operand 3 states. [2019-11-24 04:56:14,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:56:14,806 INFO L93 Difference]: Finished difference Result 561 states and 1018 transitions. [2019-11-24 04:56:14,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:56:14,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-24 04:56:14,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:56:14,809 INFO L225 Difference]: With dead ends: 561 [2019-11-24 04:56:14,810 INFO L226 Difference]: Without dead ends: 372 [2019-11-24 04:56:14,814 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 04:56:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-11-24 04:56:14,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 367. [2019-11-24 04:56:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2019-11-24 04:56:14,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 662 transitions. [2019-11-24 04:56:14,853 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 662 transitions. Word has length 17 [2019-11-24 04:56:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:56:14,853 INFO L462 AbstractCegarLoop]: Abstraction has 367 states and 662 transitions. [2019-11-24 04:56:14,853 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:56:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 662 transitions. [2019-11-24 04:56:14,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-24 04:56:14,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:56:14,857 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:56:14,857 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:56:14,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:56:14,857 INFO L82 PathProgramCache]: Analyzing trace with hash 956382981, now seen corresponding path program 1 times [2019-11-24 04:56:14,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:56:14,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722237206] [2019-11-24 04:56:14,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:56:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:15,179 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722237206] [2019-11-24 04:56:15,180 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740366956] [2019-11-24 04:56:15,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:56:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:56:15,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:56:15,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:56:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:15,587 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:56:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:56:15,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587213526] [2019-11-24 04:56:15,648 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-11-24 04:56:15,649 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:56:15,655 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:56:15,662 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:56:15,663 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:56:47,298 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 657 [2019-11-24 04:56:50,468 WARN L192 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 269 DAG size of output: 219 [2019-11-24 04:56:50,808 WARN L192 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 690 [2019-11-24 04:56:51,197 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6