/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_spec8_product15.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:11:09,913 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:11:09,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:11:09,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:11:09,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:11:09,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:11:09,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:11:09,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:11:09,938 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:11:09,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:11:09,940 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:11:09,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:11:09,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:11:09,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:11:09,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:11:09,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:11:09,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:11:09,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:11:09,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:11:09,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:11:09,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:11:09,953 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:11:09,954 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:11:09,955 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:11:09,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 05:11:09,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 05:11:09,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 05:11:09,961 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 05:11:09,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 05:11:09,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 05:11:09,963 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:11:09,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:11:09,967 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:11:09,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:11:09,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:11:09,970 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:11:09,970 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:11:09,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:11:09,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:11:09,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:11:09,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:11:09,978 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 05:11:09,992 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:11:09,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:11:09,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:11:09,993 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:11:09,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:11:09,994 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:11:09,994 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:11:09,994 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:11:09,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:11:09,995 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:11:09,995 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:11:09,995 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:11:09,995 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:11:09,996 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:11:09,996 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:11:09,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:11:09,997 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:11:09,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:11:09,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:11:09,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:11:09,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:11:09,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:11:09,998 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:11:09,998 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:11:09,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:11:09,998 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:11:09,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:11:09,999 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:11:09,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:11:09,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:11:10,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:11:10,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:11:10,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:11:10,000 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:11:10,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:11:10,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:11:10,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:11:10,001 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:11:10,272 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:11:10,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:11:10,294 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:11:10,296 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:11:10,296 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:11:10,297 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec8_product15.cil.c [2019-11-24 05:11:10,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765fa746c/23cc515979e4432cbe57fad7c9576350/FLAG09aca6453 [2019-11-24 05:11:11,065 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:11:11,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec8_product15.cil.c [2019-11-24 05:11:11,104 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765fa746c/23cc515979e4432cbe57fad7c9576350/FLAG09aca6453 [2019-11-24 05:11:11,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765fa746c/23cc515979e4432cbe57fad7c9576350 [2019-11-24 05:11:11,293 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:11:11,297 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:11:11,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:11,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:11:11,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:11:11,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:11" (1/1) ... [2019-11-24 05:11:11,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6300704b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:11, skipping insertion in model container [2019-11-24 05:11:11,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:11:11" (1/1) ... [2019-11-24 05:11:11,317 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:11:11,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:11:12,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:12,151 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:11:12,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:11:12,444 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:11:12,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12 WrapperNode [2019-11-24 05:11:12,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:11:12,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:12,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:11:12,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:11:12,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:11:12,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:11:12,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:11:12,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:11:12,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,630 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,678 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,729 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (1/1) ... [2019-11-24 05:11:12,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:11:12,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:11:12,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:11:12,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:11:12,748 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (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 05:11:12,831 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:11:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:11:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:11:12,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:11:12,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:11:19,661 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:11:19,662 INFO L284 CfgBuilder]: Removed 259 assume(true) statements. [2019-11-24 05:11:19,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:19 BoogieIcfgContainer [2019-11-24 05:11:19,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:11:19,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:11:19,664 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:11:19,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:11:19,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:11:11" (1/3) ... [2019-11-24 05:11:19,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9f4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:19, skipping insertion in model container [2019-11-24 05:11:19,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:11:12" (2/3) ... [2019-11-24 05:11:19,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9f4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:11:19, skipping insertion in model container [2019-11-24 05:11:19,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:11:19" (3/3) ... [2019-11-24 05:11:19,672 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec8_product15.cil.c [2019-11-24 05:11:19,681 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:11:19,689 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-24 05:11:19,701 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-24 05:11:19,725 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:11:19,726 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:11:19,726 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:11:19,726 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:11:19,726 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:11:19,726 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:11:19,726 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:11:19,727 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:11:19,742 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2019-11-24 05:11:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 05:11:19,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:19,750 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:19,750 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:19,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1309428408, now seen corresponding path program 1 times [2019-11-24 05:11:19,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:19,765 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088584816] [2019-11-24 05:11:19,765 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:20,077 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 05:11:20,078 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088584816] [2019-11-24 05:11:20,079 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:20,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:20,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370835818] [2019-11-24 05:11:20,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:11:20,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:20,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:11:20,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:11:20,103 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 2 states. [2019-11-24 05:11:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:20,129 INFO L93 Difference]: Finished difference Result 54 states and 87 transitions. [2019-11-24 05:11:20,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:11:20,130 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2019-11-24 05:11:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:20,144 INFO L225 Difference]: With dead ends: 54 [2019-11-24 05:11:20,144 INFO L226 Difference]: Without dead ends: 37 [2019-11-24 05:11:20,149 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 05:11:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-24 05:11:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-24 05:11:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-24 05:11:20,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions. [2019-11-24 05:11:20,199 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7 [2019-11-24 05:11:20,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:20,199 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 60 transitions. [2019-11-24 05:11:20,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:11:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions. [2019-11-24 05:11:20,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:11:20,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:20,200 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:20,201 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:20,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:20,201 INFO L82 PathProgramCache]: Analyzing trace with hash 23655085, now seen corresponding path program 1 times [2019-11-24 05:11:20,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:20,202 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957482250] [2019-11-24 05:11:20,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:20,347 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 05:11:20,347 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957482250] [2019-11-24 05:11:20,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:20,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:20,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638142961] [2019-11-24 05:11:20,349 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:20,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:20,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:20,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:20,351 INFO L87 Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states. [2019-11-24 05:11:20,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:20,373 INFO L93 Difference]: Finished difference Result 50 states and 74 transitions. [2019-11-24 05:11:20,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:20,376 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2019-11-24 05:11:20,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:20,378 INFO L225 Difference]: With dead ends: 50 [2019-11-24 05:11:20,378 INFO L226 Difference]: Without dead ends: 39 [2019-11-24 05:11:20,379 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 05:11:20,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-24 05:11:20,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-24 05:11:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-24 05:11:20,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions. [2019-11-24 05:11:20,394 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8 [2019-11-24 05:11:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:20,395 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 62 transitions. [2019-11-24 05:11:20,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions. [2019-11-24 05:11:20,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-24 05:11:20,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:20,398 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:20,399 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:20,400 INFO L82 PathProgramCache]: Analyzing trace with hash -582200060, now seen corresponding path program 1 times [2019-11-24 05:11:20,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:20,401 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618373594] [2019-11-24 05:11:20,402 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:20,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:20,679 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 05:11:20,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618373594] [2019-11-24 05:11:20,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:20,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:11:20,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657989753] [2019-11-24 05:11:20,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:20,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:20,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:20,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:20,684 INFO L87 Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states. [2019-11-24 05:11:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:20,718 INFO L93 Difference]: Finished difference Result 45 states and 67 transitions. [2019-11-24 05:11:20,720 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:20,720 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2019-11-24 05:11:20,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:20,721 INFO L225 Difference]: With dead ends: 45 [2019-11-24 05:11:20,721 INFO L226 Difference]: Without dead ends: 36 [2019-11-24 05:11:20,722 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 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 05:11:20,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-24 05:11:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-11-24 05:11:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-24 05:11:20,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions. [2019-11-24 05:11:20,730 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12 [2019-11-24 05:11:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:20,730 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 58 transitions. [2019-11-24 05:11:20,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:20,731 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions. [2019-11-24 05:11:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:11:20,731 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:20,732 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:20,732 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:20,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:20,732 INFO L82 PathProgramCache]: Analyzing trace with hash -475534531, now seen corresponding path program 1 times [2019-11-24 05:11:20,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:20,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959028366] [2019-11-24 05:11:20,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:21,062 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 05:11:21,063 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959028366] [2019-11-24 05:11:21,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:21,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 05:11:21,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721642793] [2019-11-24 05:11:21,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:11:21,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:21,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:11:21,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:11:21,065 INFO L87 Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states. [2019-11-24 05:11:21,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:21,448 INFO L93 Difference]: Finished difference Result 68 states and 112 transitions. [2019-11-24 05:11:21,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-24 05:11:21,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-24 05:11:21,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:21,450 INFO L225 Difference]: With dead ends: 68 [2019-11-24 05:11:21,451 INFO L226 Difference]: Without dead ends: 60 [2019-11-24 05:11:21,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-24 05:11:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-24 05:11:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2019-11-24 05:11:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-24 05:11:21,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions. [2019-11-24 05:11:21,473 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15 [2019-11-24 05:11:21,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:21,473 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 100 transitions. [2019-11-24 05:11:21,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:11:21,473 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions. [2019-11-24 05:11:21,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:11:21,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:21,477 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:21,477 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:21,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:21,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1787663257, now seen corresponding path program 1 times [2019-11-24 05:11:21,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:21,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160159098] [2019-11-24 05:11:21,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:21,560 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 05:11:21,560 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160159098] [2019-11-24 05:11:21,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:11:21,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:11:21,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167397569] [2019-11-24 05:11:21,561 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:11:21,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:11:21,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:11:21,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:11:21,563 INFO L87 Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states. [2019-11-24 05:11:21,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:11:21,605 INFO L93 Difference]: Finished difference Result 168 states and 292 transitions. [2019-11-24 05:11:21,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:11:21,609 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:11:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:11:21,610 INFO L225 Difference]: With dead ends: 168 [2019-11-24 05:11:21,610 INFO L226 Difference]: Without dead ends: 112 [2019-11-24 05:11:21,611 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 05:11:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-24 05:11:21,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2019-11-24 05:11:21,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-24 05:11:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions. [2019-11-24 05:11:21,640 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 16 [2019-11-24 05:11:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:11:21,641 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 185 transitions. [2019-11-24 05:11:21,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:11:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions. [2019-11-24 05:11:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:11:21,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:11:21,642 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:11:21,643 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:11:21,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:11:21,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1826029396, now seen corresponding path program 1 times [2019-11-24 05:11:21,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:11:21,644 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465395714] [2019-11-24 05:11:21,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:11:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:21,830 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 05:11:21,830 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465395714] [2019-11-24 05:11:21,831 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578292863] [2019-11-24 05:11:21,831 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 05:11:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:11:22,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:11:22,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:11:22,178 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 05:11:22,179 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:11:22,202 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 05:11:22,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [556687233] [2019-11-24 05:11:22,257 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:11:22,258 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:11:22,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:11:22,273 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:11:22,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:12:09,289 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 690 [2019-11-24 05:12:12,949 WARN L192 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 281 DAG size of output: 229 [2019-11-24 05:12:13,362 WARN L192 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 722 [2019-11-24 05:12:15,993 WARN L192 SmtUtils]: Spent 2.13 s on a formula simplification that was a NOOP. DAG size: 1105