/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/seq-pthread/cs_peterson.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 06:00:09,058 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 06:00:09,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 06:00:09,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 06:00:09,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 06:00:09,075 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 06:00:09,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 06:00:09,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 06:00:09,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 06:00:09,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 06:00:09,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 06:00:09,083 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 06:00:09,083 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 06:00:09,084 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 06:00:09,085 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 06:00:09,086 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 06:00:09,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 06:00:09,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 06:00:09,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 06:00:09,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 06:00:09,093 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 06:00:09,096 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 06:00:09,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 06:00:09,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 06:00:09,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-24 06:00:09,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-24 06:00:09,106 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-24 06:00:09,107 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-24 06:00:09,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-24 06:00:09,111 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-24 06:00:09,111 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-24 06:00:09,113 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-24 06:00:09,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-24 06:00:09,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-24 06:00:09,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-24 06:00:09,116 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-24 06:00:09,119 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-24 06:00:09,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-24 06:00:09,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 06:00:09,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 06:00:09,123 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 06:00:09,126 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 06:00:09,149 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 06:00:09,149 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 06:00:09,150 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 06:00:09,151 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 06:00:09,151 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 06:00:09,151 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 06:00:09,151 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 06:00:09,152 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 06:00:09,152 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 06:00:09,152 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 06:00:09,153 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 06:00:09,153 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 06:00:09,154 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 06:00:09,154 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 06:00:09,154 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 06:00:09,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 06:00:09,156 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 06:00:09,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 06:00:09,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 06:00:09,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 06:00:09,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 06:00:09,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 06:00:09,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 06:00:09,158 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 06:00:09,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 06:00:09,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 06:00:09,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 06:00:09,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 06:00:09,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 06:00:09,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 06:00:09,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 06:00:09,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 06:00:09,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 06:00:09,161 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 06:00:09,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 06:00:09,162 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 06:00:09,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 06:00:09,163 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 06:00:09,493 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 06:00:09,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 06:00:09,520 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 06:00:09,522 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 06:00:09,522 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 06:00:09,523 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-pthread/cs_peterson.i [2019-11-24 06:00:09,603 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071712e05/2474582f86ec40a79af4ac68ee6d9d3c/FLAG2eaecccbe [2019-11-24 06:00:10,161 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 06:00:10,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-pthread/cs_peterson.i [2019-11-24 06:00:10,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071712e05/2474582f86ec40a79af4ac68ee6d9d3c/FLAG2eaecccbe [2019-11-24 06:00:10,443 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/071712e05/2474582f86ec40a79af4ac68ee6d9d3c [2019-11-24 06:00:10,452 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 06:00:10,453 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 06:00:10,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 06:00:10,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 06:00:10,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 06:00:10,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:00:10" (1/1) ... [2019-11-24 06:00:10,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62807e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:10, skipping insertion in model container [2019-11-24 06:00:10,462 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 06:00:10" (1/1) ... [2019-11-24 06:00:10,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 06:00:10,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 06:00:11,178 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:00:11,198 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 06:00:11,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 06:00:11,378 INFO L208 MainTranslator]: Completed translation [2019-11-24 06:00:11,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11 WrapperNode [2019-11-24 06:00:11,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 06:00:11,379 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 06:00:11,379 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 06:00:11,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 06:00:11,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 06:00:11,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 06:00:11,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 06:00:11,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 06:00:11,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,532 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,600 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (1/1) ... [2019-11-24 06:00:11,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 06:00:11,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 06:00:11,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 06:00:11,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 06:00:11,620 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (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 06:00:11,709 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 06:00:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 06:00:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-24 06:00:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-24 06:00:11,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-24 06:00:11,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-24 06:00:11,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-24 06:00:11,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-11-24 06:00:11,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 06:00:11,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 06:01:27,006 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 06:01:27,007 INFO L284 CfgBuilder]: Removed 74 assume(true) statements. [2019-11-24 06:01:27,008 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:27 BoogieIcfgContainer [2019-11-24 06:01:27,008 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 06:01:27,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 06:01:27,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 06:01:27,013 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 06:01:27,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 06:00:10" (1/3) ... [2019-11-24 06:01:27,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb57f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:27, skipping insertion in model container [2019-11-24 06:01:27,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 06:00:11" (2/3) ... [2019-11-24 06:01:27,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cb57f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 06:01:27, skipping insertion in model container [2019-11-24 06:01:27,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 06:01:27" (3/3) ... [2019-11-24 06:01:27,016 INFO L109 eAbstractionObserver]: Analyzing ICFG cs_peterson.i [2019-11-24 06:01:27,026 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 06:01:27,033 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 06:01:27,044 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 06:01:27,065 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 06:01:27,066 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 06:01:27,066 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 06:01:27,066 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 06:01:27,066 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 06:01:27,066 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 06:01:27,066 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 06:01:27,067 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 06:01:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states. [2019-11-24 06:01:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 06:01:27,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:27,084 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 06:01:27,085 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:27,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:27,091 INFO L82 PathProgramCache]: Analyzing trace with hash 15529010, now seen corresponding path program 1 times [2019-11-24 06:01:27,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:27,098 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926329817] [2019-11-24 06:01:27,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:35,450 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 06:01:35,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926329817] [2019-11-24 06:01:35,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:35,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 06:01:35,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965556591] [2019-11-24 06:01:35,461 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:35,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:35,483 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-24 06:01:37,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:37,648 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-24 06:01:37,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:37,650 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 06:01:37,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:37,658 INFO L225 Difference]: With dead ends: 15 [2019-11-24 06:01:37,658 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 06:01:37,661 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 06:01:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 06:01:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2019-11-24 06:01:37,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 06:01:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-24 06:01:37,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2019-11-24 06:01:37,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:37,687 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-24 06:01:37,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2019-11-24 06:01:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 06:01:37,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:37,688 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 06:01:37,688 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:37,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1455838009, now seen corresponding path program 1 times [2019-11-24 06:01:37,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:37,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794084460] [2019-11-24 06:01:37,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 06:01:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 06:01:46,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794084460] [2019-11-24 06:01:46,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 06:01:46,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 06:01:46,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768953495] [2019-11-24 06:01:46,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 06:01:46,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 06:01:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 06:01:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 06:01:46,384 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand 3 states. [2019-11-24 06:01:46,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 06:01:46,413 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2019-11-24 06:01:46,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 06:01:46,413 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-24 06:01:46,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 06:01:46,414 INFO L225 Difference]: With dead ends: 13 [2019-11-24 06:01:46,414 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 06:01:46,415 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 06:01:46,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 06:01:46,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 06:01:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 06:01:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-24 06:01:46,418 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2019-11-24 06:01:46,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 06:01:46,418 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-24 06:01:46,418 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 06:01:46,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2019-11-24 06:01:46,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 06:01:46,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 06:01:46,419 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 06:01:46,420 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 06:01:46,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 06:01:46,420 INFO L82 PathProgramCache]: Analyzing trace with hash 2108408100, now seen corresponding path program 1 times [2019-11-24 06:01:46,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 06:01:46,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813535928] [2019-11-24 06:01:46,421 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 06:01:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat