/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_spec4_product34.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 05:04:39,986 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 05:04:39,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 05:04:40,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 05:04:40,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 05:04:40,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 05:04:40,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 05:04:40,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 05:04:40,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 05:04:40,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 05:04:40,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 05:04:40,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 05:04:40,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 05:04:40,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 05:04:40,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 05:04:40,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 05:04:40,039 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 05:04:40,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 05:04:40,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 05:04:40,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 05:04:40,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 05:04:40,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 05:04:40,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 05:04:40,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 05:04:40,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 05:04:40,056 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 05:04:40,057 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 05:04:40,057 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 05:04:40,058 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 05:04:40,059 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 05:04:40,059 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 05:04:40,060 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 05:04:40,060 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 05:04:40,060 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 05:04:40,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 05:04:40,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 05:04:40,064 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 05:04:40,078 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 05:04:40,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 05:04:40,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 05:04:40,080 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 05:04:40,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 05:04:40,080 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 05:04:40,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 05:04:40,081 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 05:04:40,081 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 05:04:40,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 05:04:40,081 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 05:04:40,081 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 05:04:40,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 05:04:40,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 05:04:40,082 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 05:04:40,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 05:04:40,083 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 05:04:40,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 05:04:40,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 05:04:40,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 05:04:40,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 05:04:40,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 05:04:40,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 05:04:40,084 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 05:04:40,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 05:04:40,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 05:04:40,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 05:04:40,085 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 05:04:40,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 05:04:40,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 05:04:40,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 05:04:40,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 05:04:40,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 05:04:40,086 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 05:04:40,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 05:04:40,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 05:04:40,087 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 05:04:40,087 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 05:04:40,350 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 05:04:40,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 05:04:40,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 05:04:40,373 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 05:04:40,373 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 05:04:40,374 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec4_product34.cil.c [2019-11-24 05:04:40,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d337ae346/e1138553e3b94eb89f20b65f1f790f35/FLAG0be8e7ac4 [2019-11-24 05:04:41,097 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 05:04:41,098 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec4_product34.cil.c [2019-11-24 05:04:41,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d337ae346/e1138553e3b94eb89f20b65f1f790f35/FLAG0be8e7ac4 [2019-11-24 05:04:41,294 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d337ae346/e1138553e3b94eb89f20b65f1f790f35 [2019-11-24 05:04:41,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 05:04:41,304 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 05:04:41,306 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 05:04:41,306 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 05:04:41,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 05:04:41,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:04:41" (1/1) ... [2019-11-24 05:04:41,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51de3a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:41, skipping insertion in model container [2019-11-24 05:04:41,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 05:04:41" (1/1) ... [2019-11-24 05:04:41,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 05:04:41,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 05:04:42,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:04:42,155 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 05:04:42,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 05:04:42,474 INFO L208 MainTranslator]: Completed translation [2019-11-24 05:04:42,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42 WrapperNode [2019-11-24 05:04:42,475 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 05:04:42,476 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 05:04:42,476 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 05:04:42,476 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 05:04:42,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,558 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,777 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 05:04:42,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 05:04:42,778 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 05:04:42,778 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 05:04:42,788 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (1/1) ... [2019-11-24 05:04:42,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 05:04:42,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 05:04:42,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 05:04:42,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 05:04:43,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (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 05:04:43,132 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2019-11-24 05:04:43,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 05:04:43,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 05:04:43,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 05:04:43,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 05:05:03,181 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 05:05:03,182 INFO L284 CfgBuilder]: Removed 849 assume(true) statements. [2019-11-24 05:05:03,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:05:03 BoogieIcfgContainer [2019-11-24 05:05:03,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 05:05:03,185 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 05:05:03,185 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 05:05:03,188 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 05:05:03,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 05:04:41" (1/3) ... [2019-11-24 05:05:03,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f58b884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:05:03, skipping insertion in model container [2019-11-24 05:05:03,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 05:04:42" (2/3) ... [2019-11-24 05:05:03,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f58b884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 05:05:03, skipping insertion in model container [2019-11-24 05:05:03,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 05:05:03" (3/3) ... [2019-11-24 05:05:03,192 INFO L109 eAbstractionObserver]: Analyzing ICFG email_spec4_product34.cil.c [2019-11-24 05:05:03,202 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 05:05:03,209 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2019-11-24 05:05:03,218 INFO L249 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2019-11-24 05:05:03,243 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 05:05:03,244 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 05:05:03,244 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 05:05:03,244 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 05:05:03,244 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 05:05:03,244 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 05:05:03,244 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 05:05:03,244 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 05:05:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2019-11-24 05:05:03,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 05:05:03,269 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:05:03,270 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:05:03,271 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:05:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:05:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1207815415, now seen corresponding path program 1 times [2019-11-24 05:05:03,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:05:03,287 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145760042] [2019-11-24 05:05:03,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:05:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:03,631 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 05:05:03,632 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145760042] [2019-11-24 05:05:03,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:05:03,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 05:05:03,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789293579] [2019-11-24 05:05:03,638 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 05:05:03,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:05:03,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 05:05:03,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 05:05:03,655 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 2 states. [2019-11-24 05:05:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:05:03,682 INFO L93 Difference]: Finished difference Result 100 states and 153 transitions. [2019-11-24 05:05:03,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 05:05:03,683 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2019-11-24 05:05:03,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:05:03,695 INFO L225 Difference]: With dead ends: 100 [2019-11-24 05:05:03,696 INFO L226 Difference]: Without dead ends: 59 [2019-11-24 05:05:03,699 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 05:05:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-24 05:05:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-24 05:05:03,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-24 05:05:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 86 transitions. [2019-11-24 05:05:03,742 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 86 transitions. Word has length 8 [2019-11-24 05:05:03,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:05:03,743 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 86 transitions. [2019-11-24 05:05:03,743 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 05:05:03,743 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 86 transitions. [2019-11-24 05:05:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 05:05:03,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:05:03,744 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:05:03,745 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:05:03,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:05:03,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1033701264, now seen corresponding path program 1 times [2019-11-24 05:05:03,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:05:03,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769367266] [2019-11-24 05:05:03,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:05:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:03,905 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 05:05:03,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769367266] [2019-11-24 05:05:03,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:05:03,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:05:03,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807125558] [2019-11-24 05:05:03,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:05:03,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:05:03,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:05:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:05:03,910 INFO L87 Difference]: Start difference. First operand 59 states and 86 transitions. Second operand 3 states. [2019-11-24 05:05:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:05:03,941 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2019-11-24 05:05:03,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:05:03,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-24 05:05:03,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:05:03,945 INFO L225 Difference]: With dead ends: 94 [2019-11-24 05:05:03,945 INFO L226 Difference]: Without dead ends: 61 [2019-11-24 05:05:03,947 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 05:05:03,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-24 05:05:03,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-24 05:05:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-24 05:05:03,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 88 transitions. [2019-11-24 05:05:03,962 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 88 transitions. Word has length 9 [2019-11-24 05:05:03,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:05:03,962 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 88 transitions. [2019-11-24 05:05:03,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:05:03,962 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 88 transitions. [2019-11-24 05:05:03,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-24 05:05:03,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:05:03,963 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:05:03,964 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:05:03,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:05:03,964 INFO L82 PathProgramCache]: Analyzing trace with hash 11863601, now seen corresponding path program 1 times [2019-11-24 05:05:03,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:05:03,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72479282] [2019-11-24 05:05:03,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:05:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:04,295 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 05:05:04,296 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72479282] [2019-11-24 05:05:04,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:05:04,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 05:05:04,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988064297] [2019-11-24 05:05:04,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 05:05:04,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:05:04,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 05:05:04,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-24 05:05:04,299 INFO L87 Difference]: Start difference. First operand 61 states and 88 transitions. Second operand 6 states. [2019-11-24 05:05:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:05:05,526 INFO L93 Difference]: Finished difference Result 124 states and 179 transitions. [2019-11-24 05:05:05,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-24 05:05:05,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-11-24 05:05:05,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:05:05,532 INFO L225 Difference]: With dead ends: 124 [2019-11-24 05:05:05,532 INFO L226 Difference]: Without dead ends: 118 [2019-11-24 05:05:05,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2019-11-24 05:05:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-24 05:05:05,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2019-11-24 05:05:05,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-24 05:05:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 148 transitions. [2019-11-24 05:05:05,546 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 148 transitions. Word has length 13 [2019-11-24 05:05:05,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:05:05,546 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 148 transitions. [2019-11-24 05:05:05,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 05:05:05,546 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 148 transitions. [2019-11-24 05:05:05,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-24 05:05:05,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:05:05,548 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:05:05,548 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:05:05,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:05:05,548 INFO L82 PathProgramCache]: Analyzing trace with hash 783621399, now seen corresponding path program 1 times [2019-11-24 05:05:05,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:05:05,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908448967] [2019-11-24 05:05:05,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:05:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:05,627 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 05:05:05,627 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908448967] [2019-11-24 05:05:05,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:05:05,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:05:05,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285549538] [2019-11-24 05:05:05,628 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:05:05,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:05:05,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:05:05,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:05:05,629 INFO L87 Difference]: Start difference. First operand 94 states and 148 transitions. Second operand 3 states. [2019-11-24 05:05:05,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:05:05,658 INFO L93 Difference]: Finished difference Result 272 states and 432 transitions. [2019-11-24 05:05:05,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:05:05,659 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-24 05:05:05,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:05:05,661 INFO L225 Difference]: With dead ends: 272 [2019-11-24 05:05:05,661 INFO L226 Difference]: Without dead ends: 182 [2019-11-24 05:05:05,664 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 05:05:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-11-24 05:05:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2019-11-24 05:05:05,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2019-11-24 05:05:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 236 transitions. [2019-11-24 05:05:05,700 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 236 transitions. Word has length 15 [2019-11-24 05:05:05,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:05:05,701 INFO L462 AbstractCegarLoop]: Abstraction has 140 states and 236 transitions. [2019-11-24 05:05:05,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:05:05,701 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 236 transitions. [2019-11-24 05:05:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 05:05:05,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:05:05,702 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:05:05,703 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:05:05,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:05:05,703 INFO L82 PathProgramCache]: Analyzing trace with hash -221715560, now seen corresponding path program 1 times [2019-11-24 05:05:05,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:05:05,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410296633] [2019-11-24 05:05:05,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:05:05,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:05,765 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 05:05:05,766 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410296633] [2019-11-24 05:05:05,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 05:05:05,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 05:05:05,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348199693] [2019-11-24 05:05:05,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 05:05:05,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 05:05:05,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 05:05:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 05:05:05,768 INFO L87 Difference]: Start difference. First operand 140 states and 236 transitions. Second operand 3 states. [2019-11-24 05:05:05,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 05:05:05,789 INFO L93 Difference]: Finished difference Result 408 states and 692 transitions. [2019-11-24 05:05:05,790 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 05:05:05,790 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-11-24 05:05:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 05:05:05,792 INFO L225 Difference]: With dead ends: 408 [2019-11-24 05:05:05,792 INFO L226 Difference]: Without dead ends: 272 [2019-11-24 05:05:05,794 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 05:05:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-11-24 05:05:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 230. [2019-11-24 05:05:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2019-11-24 05:05:05,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 406 transitions. [2019-11-24 05:05:05,838 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 406 transitions. Word has length 16 [2019-11-24 05:05:05,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 05:05:05,841 INFO L462 AbstractCegarLoop]: Abstraction has 230 states and 406 transitions. [2019-11-24 05:05:05,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 05:05:05,842 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 406 transitions. [2019-11-24 05:05:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 05:05:05,843 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 05:05:05,843 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 05:05:05,844 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 05:05:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 05:05:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1521135913, now seen corresponding path program 1 times [2019-11-24 05:05:05,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 05:05:05,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044066476] [2019-11-24 05:05:05,845 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 05:05:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:06,033 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 05:05:06,033 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044066476] [2019-11-24 05:05:06,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907932852] [2019-11-24 05:05:06,034 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 05:05:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 05:05:06,578 INFO L255 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 05:05:06,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 05:05:06,631 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 05:05:06,631 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 05:05:06,661 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 05:05:06,661 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [511634763] [2019-11-24 05:05:06,690 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-11-24 05:05:06,691 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 05:05:06,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 05:05:06,708 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 05:05:06,709 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 05:06:16,539 WARN L192 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 709