java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/psyco/psyco_net_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:19:40,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:19:40,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:19:40,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:19:40,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:19:40,825 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:19:40,827 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:19:40,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:19:40,830 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:19:40,831 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:19:40,832 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:19:40,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:19:40,834 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:19:40,835 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:19:40,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:19:40,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:19:40,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:19:40,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:19:40,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:19:40,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:19:40,845 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:19:40,846 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:19:40,847 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:19:40,848 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:19:40,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:19:40,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:19:40,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:19:40,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:19:40,861 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 23:19:40,886 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:19:40,887 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:19:40,889 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:19:40,890 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:19:40,890 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:19:40,890 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:19:40,890 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:19:40,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:19:40,891 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:19:40,891 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:19:40,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:19:40,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:19:40,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:19:40,893 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:19:40,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:19:40,894 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:19:40,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:19:40,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:19:40,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:19:40,895 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:19:40,895 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:19:40,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:19:40,896 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:19:40,896 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:19:40,896 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:19:40,896 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:19:40,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:19:40,897 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:19:40,897 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 23:19:41,212 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:19:41,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:19:41,240 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:19:41,242 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:19:41,242 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:19:41,243 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_net_1.c [2019-10-13 23:19:41,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da52cf928/3a2fac1a64ad4f3f909c83b9d06cafd3/FLAGa36845a66 [2019-10-13 23:19:42,749 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:19:42,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_net_1.c [2019-10-13 23:19:42,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da52cf928/3a2fac1a64ad4f3f909c83b9d06cafd3/FLAGa36845a66 [2019-10-13 23:19:43,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da52cf928/3a2fac1a64ad4f3f909c83b9d06cafd3 [2019-10-13 23:19:43,209 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:19:43,211 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:19:43,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:19:43,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:19:43,217 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:19:43,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:19:43" (1/1) ... [2019-10-13 23:19:43,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4975dbb3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:43, skipping insertion in model container [2019-10-13 23:19:43,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:19:43" (1/1) ... [2019-10-13 23:19:43,230 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:19:43,856 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:19:45,572 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:19:45,586 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:19:46,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:19:46,791 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:19:46,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46 WrapperNode [2019-10-13 23:19:46,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:19:46,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:19:46,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:19:46,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:19:46,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:46,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:46,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:46,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:47,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:47,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:47,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (1/1) ... [2019-10-13 23:19:47,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:19:47,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:19:47,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:19:47,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:19:47,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (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 [2019-10-13 23:19:47,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:19:47,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:19:47,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:19:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:19:47,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:19:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:19:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:19:47,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:20:08,073 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:20:08,073 INFO L284 CfgBuilder]: Removed 1130 assume(true) statements. [2019-10-13 23:20:08,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:08 BoogieIcfgContainer [2019-10-13 23:20:08,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:20:08,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:20:08,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:20:08,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:20:08,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:19:43" (1/3) ... [2019-10-13 23:20:08,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd87702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:08, skipping insertion in model container [2019-10-13 23:20:08,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:19:46" (2/3) ... [2019-10-13 23:20:08,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd87702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:20:08, skipping insertion in model container [2019-10-13 23:20:08,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:20:08" (3/3) ... [2019-10-13 23:20:08,088 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_net_1.c [2019-10-13 23:20:08,098 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:20:08,111 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:20:08,123 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:20:08,191 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:20:08,191 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:20:08,192 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:20:08,192 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:20:08,192 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:20:08,192 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:20:08,193 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:20:08,193 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:20:08,343 INFO L276 IsEmpty]: Start isEmpty. Operand 9215 states. [2019-10-13 23:20:08,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 23:20:08,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:08,350 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:08,352 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:08,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:08,358 INFO L82 PathProgramCache]: Analyzing trace with hash -2107451093, now seen corresponding path program 1 times [2019-10-13 23:20:08,368 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:08,368 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032322082] [2019-10-13 23:20:08,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:08,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:08,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:08,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:20:08,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032322082] [2019-10-13 23:20:08,681 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:08,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:20:08,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348439934] [2019-10-13 23:20:08,686 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:20:08,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:08,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:20:08,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:20:08,704 INFO L87 Difference]: Start difference. First operand 9215 states. Second operand 2 states. [2019-10-13 23:20:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:09,038 INFO L93 Difference]: Finished difference Result 17703 states and 35385 transitions. [2019-10-13 23:20:09,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:20:09,041 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-13 23:20:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:09,139 INFO L225 Difference]: With dead ends: 17703 [2019-10-13 23:20:09,139 INFO L226 Difference]: Without dead ends: 8283 [2019-10-13 23:20:09,183 INFO L600 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 [2019-10-13 23:20:09,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8283 states. [2019-10-13 23:20:09,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8283 to 8283. [2019-10-13 23:20:09,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8283 states. [2019-10-13 23:20:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8283 states to 8283 states and 13000 transitions. [2019-10-13 23:20:09,592 INFO L78 Accepts]: Start accepts. Automaton has 8283 states and 13000 transitions. Word has length 12 [2019-10-13 23:20:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:09,592 INFO L462 AbstractCegarLoop]: Abstraction has 8283 states and 13000 transitions. [2019-10-13 23:20:09,593 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:20:09,593 INFO L276 IsEmpty]: Start isEmpty. Operand 8283 states and 13000 transitions. [2019-10-13 23:20:09,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 23:20:09,596 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:09,596 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:09,596 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash -375412944, now seen corresponding path program 1 times [2019-10-13 23:20:09,598 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:09,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739658641] [2019-10-13 23:20:09,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:09,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:09,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:20:09,960 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739658641] [2019-10-13 23:20:09,960 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:09,960 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:20:09,961 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715689483] [2019-10-13 23:20:09,962 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:20:09,962 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:20:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:20:09,963 INFO L87 Difference]: Start difference. First operand 8283 states and 13000 transitions. Second operand 3 states. [2019-10-13 23:20:12,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:12,399 INFO L93 Difference]: Finished difference Result 16564 states and 25999 transitions. [2019-10-13 23:20:12,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:20:12,400 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-13 23:20:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:20:12,448 INFO L225 Difference]: With dead ends: 16564 [2019-10-13 23:20:12,448 INFO L226 Difference]: Without dead ends: 8286 [2019-10-13 23:20:12,467 INFO L600 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 [2019-10-13 23:20:12,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8286 states. [2019-10-13 23:20:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8286 to 8286. [2019-10-13 23:20:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8286 states. [2019-10-13 23:20:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8286 states to 8286 states and 13003 transitions. [2019-10-13 23:20:12,647 INFO L78 Accepts]: Start accepts. Automaton has 8286 states and 13003 transitions. Word has length 13 [2019-10-13 23:20:12,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:20:12,647 INFO L462 AbstractCegarLoop]: Abstraction has 8286 states and 13003 transitions. [2019-10-13 23:20:12,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 23:20:12,648 INFO L276 IsEmpty]: Start isEmpty. Operand 8286 states and 13003 transitions. [2019-10-13 23:20:12,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 23:20:12,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:20:12,649 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:20:12,649 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:20:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:20:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash 435579118, now seen corresponding path program 1 times [2019-10-13 23:20:12,650 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:20:12,651 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195246954] [2019-10-13 23:20:12,651 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:12,652 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:20:12,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:20:12,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:20:12,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:20:12,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195246954] [2019-10-13 23:20:12,752 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:20:12,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 23:20:12,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355021804] [2019-10-13 23:20:12,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 23:20:12,753 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:20:12,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 23:20:12,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 23:20:12,754 INFO L87 Difference]: Start difference. First operand 8286 states and 13003 transitions. Second operand 3 states. [2019-10-13 23:20:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:20:14,758 INFO L93 Difference]: Finished difference Result 16459 states and 25848 transitions. [2019-10-13 23:20:14,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 23:20:14,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 23:20:14,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted.