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_abp_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:24:14,201 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:24:14,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:24:14,221 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:24:14,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:24:14,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:24:14,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:24:14,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:24:14,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:24:14,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:24:14,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:24:14,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:24:14,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:24:14,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:24:14,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:24:14,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:24:14,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:24:14,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:24:14,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:24:14,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:24:14,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:24:14,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:24:14,268 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:24:14,270 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:24:14,273 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:24:14,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:24:14,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:24:14,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:24:14,288 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 [2019-10-15 03:24:14,313 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:24:14,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:24:14,316 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:24:14,316 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:24:14,318 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:24:14,319 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:24:14,319 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:24:14,319 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:24:14,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:24:14,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:24:14,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:24:14,320 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:24:14,320 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:24:14,320 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:24:14,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:24:14,320 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:24:14,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:24:14,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:24:14,322 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:24:14,322 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:24:14,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:24:14,323 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:24:14,323 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:24:14,323 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:24:14,323 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:24:14,324 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:24:14,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:24:14,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:24:14,328 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 [2019-10-15 03:24:14,614 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:24:14,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:24:14,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:24:14,638 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:24:14,639 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:24:14,640 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-10-15 03:24:14,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcb232df/b3f00063df0148abb6c8a2acc3ca7e43/FLAG37304b4ae [2019-10-15 03:24:15,324 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:24:15,325 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_abp_1-1.c [2019-10-15 03:24:15,339 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcb232df/b3f00063df0148abb6c8a2acc3ca7e43/FLAG37304b4ae [2019-10-15 03:24:15,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/edcb232df/b3f00063df0148abb6c8a2acc3ca7e43 [2019-10-15 03:24:15,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:24:15,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:24:15,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:15,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:24:15,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:24:15,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:15" (1/1) ... [2019-10-15 03:24:15,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777900ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:15, skipping insertion in model container [2019-10-15 03:24:15,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:24:15" (1/1) ... [2019-10-15 03:24:15,690 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:24:15,744 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:24:16,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:16,062 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:24:16,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:24:16,289 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:24:16,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16 WrapperNode [2019-10-15 03:24:16,290 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:24:16,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:24:16,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:24:16,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:24:16,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,321 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (1/1) ... [2019-10-15 03:24:16,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:24:16,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:24:16,390 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:24:16,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:24:16,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (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 [2019-10-15 03:24:16,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:24:16,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:24:16,472 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:24:16,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:24:16,473 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:24:16,474 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:24:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:24:16,475 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:24:17,497 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:24:17,497 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-10-15 03:24:17,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:17 BoogieIcfgContainer [2019-10-15 03:24:17,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:24:17,500 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:24:17,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:24:17,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:24:17,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:24:15" (1/3) ... [2019-10-15 03:24:17,505 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554a886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:17, skipping insertion in model container [2019-10-15 03:24:17,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:24:16" (2/3) ... [2019-10-15 03:24:17,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@554a886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:24:17, skipping insertion in model container [2019-10-15 03:24:17,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:24:17" (3/3) ... [2019-10-15 03:24:17,508 INFO L109 eAbstractionObserver]: Analyzing ICFG psyco_abp_1-1.c [2019-10-15 03:24:17,518 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:24:17,527 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:24:17,539 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:24:17,564 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:24:17,564 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:24:17,565 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:24:17,565 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:24:17,565 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:24:17,565 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:24:17,566 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:24:17,566 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:24:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states. [2019-10-15 03:24:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-15 03:24:17,595 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:17,597 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:17,599 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:17,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:17,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1839617787, now seen corresponding path program 1 times [2019-10-15 03:24:17,615 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:17,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248963387] [2019-10-15 03:24:17,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:17,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:17,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:17,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248963387] [2019-10-15 03:24:17,771 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:17,771 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:24:17,772 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336641530] [2019-10-15 03:24:17,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:24:17,777 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:17,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:24:17,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:24:17,794 INFO L87 Difference]: Start difference. First operand 113 states. Second operand 2 states. [2019-10-15 03:24:17,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:17,836 INFO L93 Difference]: Finished difference Result 221 states and 421 transitions. [2019-10-15 03:24:17,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:24:17,838 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-10-15 03:24:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:17,850 INFO L225 Difference]: With dead ends: 221 [2019-10-15 03:24:17,851 INFO L226 Difference]: Without dead ends: 108 [2019-10-15 03:24:17,854 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 [2019-10-15 03:24:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-15 03:24:17,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2019-10-15 03:24:17,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-10-15 03:24:17,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 178 transitions. [2019-10-15 03:24:17,904 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 178 transitions. Word has length 12 [2019-10-15 03:24:17,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:17,905 INFO L462 AbstractCegarLoop]: Abstraction has 108 states and 178 transitions. [2019-10-15 03:24:17,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:24:17,905 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 178 transitions. [2019-10-15 03:24:17,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 03:24:17,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:17,906 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:17,907 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:17,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:17,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1726064074, now seen corresponding path program 1 times [2019-10-15 03:24:17,908 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:17,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253706448] [2019-10-15 03:24:17,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:17,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:17,909 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:17,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:17,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:17,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253706448] [2019-10-15 03:24:17,991 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:17,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:17,991 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853328558] [2019-10-15 03:24:17,993 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:17,994 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:17,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:17,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:17,995 INFO L87 Difference]: Start difference. First operand 108 states and 178 transitions. Second operand 3 states. [2019-10-15 03:24:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:18,109 INFO L93 Difference]: Finished difference Result 214 states and 355 transitions. [2019-10-15 03:24:18,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:18,110 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-10-15 03:24:18,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:18,112 INFO L225 Difference]: With dead ends: 214 [2019-10-15 03:24:18,112 INFO L226 Difference]: Without dead ends: 111 [2019-10-15 03:24:18,114 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 [2019-10-15 03:24:18,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-10-15 03:24:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2019-10-15 03:24:18,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2019-10-15 03:24:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 181 transitions. [2019-10-15 03:24:18,127 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 181 transitions. Word has length 13 [2019-10-15 03:24:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:18,127 INFO L462 AbstractCegarLoop]: Abstraction has 111 states and 181 transitions. [2019-10-15 03:24:18,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 181 transitions. [2019-10-15 03:24:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 03:24:18,129 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:18,129 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:18,129 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1125989120, now seen corresponding path program 1 times [2019-10-15 03:24:18,130 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:18,131 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026470137] [2019-10-15 03:24:18,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:18,131 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:18,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:18,587 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2019-10-15 03:24:18,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:18,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026470137] [2019-10-15 03:24:18,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:18,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 03:24:18,592 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267308560] [2019-10-15 03:24:18,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 03:24:18,593 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:18,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 03:24:18,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:24:18,594 INFO L87 Difference]: Start difference. First operand 111 states and 181 transitions. Second operand 4 states. [2019-10-15 03:24:18,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:18,924 INFO L93 Difference]: Finished difference Result 218 states and 357 transitions. [2019-10-15 03:24:18,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:18,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-15 03:24:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:18,927 INFO L225 Difference]: With dead ends: 218 [2019-10-15 03:24:18,927 INFO L226 Difference]: Without dead ends: 194 [2019-10-15 03:24:18,928 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 03:24:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2019-10-15 03:24:18,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 180. [2019-10-15 03:24:18,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-10-15 03:24:18,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 294 transitions. [2019-10-15 03:24:18,946 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 294 transitions. Word has length 18 [2019-10-15 03:24:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:18,947 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 294 transitions. [2019-10-15 03:24:18,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 03:24:18,947 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 294 transitions. [2019-10-15 03:24:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 03:24:18,948 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:18,948 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:18,949 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:18,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:18,949 INFO L82 PathProgramCache]: Analyzing trace with hash -997795643, now seen corresponding path program 1 times [2019-10-15 03:24:18,949 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:18,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160364156] [2019-10-15 03:24:18,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:18,950 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:18,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:18,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160364156] [2019-10-15 03:24:18,996 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:18,996 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:18,996 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027341464] [2019-10-15 03:24:18,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:18,997 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:18,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:18,997 INFO L87 Difference]: Start difference. First operand 180 states and 294 transitions. Second operand 3 states. [2019-10-15 03:24:19,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:19,032 INFO L93 Difference]: Finished difference Result 306 states and 500 transitions. [2019-10-15 03:24:19,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:19,033 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-10-15 03:24:19,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:19,035 INFO L225 Difference]: With dead ends: 306 [2019-10-15 03:24:19,035 INFO L226 Difference]: Without dead ends: 132 [2019-10-15 03:24:19,037 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 [2019-10-15 03:24:19,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-15 03:24:19,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-10-15 03:24:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-15 03:24:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 207 transitions. [2019-10-15 03:24:19,047 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 207 transitions. Word has length 19 [2019-10-15 03:24:19,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:19,047 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 207 transitions. [2019-10-15 03:24:19,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:19,048 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 207 transitions. [2019-10-15 03:24:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 03:24:19,049 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:19,049 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:19,049 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:19,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:19,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1118288059, now seen corresponding path program 1 times [2019-10-15 03:24:19,050 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:19,050 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109950334] [2019-10-15 03:24:19,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:19,051 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:19,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:19,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-15 03:24:19,136 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109950334] [2019-10-15 03:24:19,136 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:24:19,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:24:19,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948251656] [2019-10-15 03:24:19,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:24:19,138 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:19,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:24:19,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:24:19,140 INFO L87 Difference]: Start difference. First operand 130 states and 207 transitions. Second operand 3 states. [2019-10-15 03:24:19,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:19,176 INFO L93 Difference]: Finished difference Result 238 states and 379 transitions. [2019-10-15 03:24:19,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:24:19,176 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 03:24:19,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:19,178 INFO L225 Difference]: With dead ends: 238 [2019-10-15 03:24:19,178 INFO L226 Difference]: Without dead ends: 114 [2019-10-15 03:24:19,179 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 [2019-10-15 03:24:19,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-10-15 03:24:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2019-10-15 03:24:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2019-10-15 03:24:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 174 transitions. [2019-10-15 03:24:19,188 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 174 transitions. Word has length 24 [2019-10-15 03:24:19,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:19,188 INFO L462 AbstractCegarLoop]: Abstraction has 112 states and 174 transitions. [2019-10-15 03:24:19,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:24:19,189 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 174 transitions. [2019-10-15 03:24:19,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 03:24:19,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:19,190 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:19,191 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:19,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1177986534, now seen corresponding path program 1 times [2019-10-15 03:24:19,192 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:19,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406690244] [2019-10-15 03:24:19,192 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:19,192 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:19,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:19,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406690244] [2019-10-15 03:24:19,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739995562] [2019-10-15 03:24:19,251 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 [2019-10-15 03:24:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:19,339 INFO L256 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:24:19,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:19,387 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:19,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [809602997] [2019-10-15 03:24:19,449 INFO L162 IcfgInterpreter]: Started Sifa with 22 locations of interest [2019-10-15 03:24:19,449 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:24:19,456 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:24:19,465 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:24:19,466 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:24:19,654 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 36 for LOIs [2019-10-15 03:24:31,603 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 22 for LOIs [2019-10-15 03:24:31,613 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:24:32,006 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2019-10-15 03:24:32,255 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2019-10-15 03:24:32,527 WARN L191 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-10-15 03:24:32,774 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2019-10-15 03:24:33,012 WARN L191 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2019-10-15 03:24:33,277 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2019-10-15 03:24:33,578 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2019-10-15 03:24:33,848 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-10-15 03:24:34,182 WARN L191 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 72 [2019-10-15 03:24:34,658 WARN L191 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2019-10-15 03:24:35,097 WARN L191 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2019-10-15 03:24:35,226 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:24:35,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [4, 4, 4] total 19 [2019-10-15 03:24:35,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226628504] [2019-10-15 03:24:35,230 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-15 03:24:35,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:24:35,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-15 03:24:35,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:24:35,232 INFO L87 Difference]: Start difference. First operand 112 states and 174 transitions. Second operand 16 states. [2019-10-15 03:24:35,647 WARN L191 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 83 [2019-10-15 03:24:35,935 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2019-10-15 03:24:36,096 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2019-10-15 03:24:36,235 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 03:24:36,424 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2019-10-15 03:24:36,613 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-15 03:24:36,799 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2019-10-15 03:24:37,136 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-15 03:24:37,408 WARN L191 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2019-10-15 03:24:38,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:24:38,087 INFO L93 Difference]: Finished difference Result 223 states and 352 transitions. [2019-10-15 03:24:38,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-15 03:24:38,088 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 26 [2019-10-15 03:24:38,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:24:38,090 INFO L225 Difference]: With dead ends: 223 [2019-10-15 03:24:38,090 INFO L226 Difference]: Without dead ends: 135 [2019-10-15 03:24:38,092 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2019-10-15 03:24:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-15 03:24:38,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 129. [2019-10-15 03:24:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-15 03:24:38,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 200 transitions. [2019-10-15 03:24:38,101 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 200 transitions. Word has length 26 [2019-10-15 03:24:38,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:24:38,101 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 200 transitions. [2019-10-15 03:24:38,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-15 03:24:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 200 transitions. [2019-10-15 03:24:38,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 03:24:38,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:24:38,103 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:24:38,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:38,307 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:24:38,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:24:38,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2125679555, now seen corresponding path program 1 times [2019-10-15 03:24:38,308 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:24:38,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18125614] [2019-10-15 03:24:38,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:38,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:24:38,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:24:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:38,431 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18125614] [2019-10-15 03:24:38,432 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416494233] [2019-10-15 03:24:38,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:24:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:24:38,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 03:24:38,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:24:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:38,593 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:24:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:24:38,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [374311822] [2019-10-15 03:24:38,706 INFO L162 IcfgInterpreter]: Started Sifa with 23 locations of interest [2019-10-15 03:24:38,706 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:24:38,707 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:24:38,707 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:24:38,707 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:24:38,749 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 36 for LOIs [2019-10-15 03:24:48,327 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 22 for LOIs [2019-10-15 03:24:48,331 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:24:48,895 WARN L191 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 73 [2019-10-15 03:24:49,162 WARN L191 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 76 [2019-10-15 03:24:49,534 WARN L191 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2019-10-15 03:24:49,924 WARN L191 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 76 [2019-10-15 03:24:50,183 WARN L191 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 74 [2019-10-15 03:24:50,472 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2019-10-15 03:24:50,749 WARN L191 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-10-15 03:24:51,086 WARN L191 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2019-10-15 03:24:51,438 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2019-10-15 03:24:51,907 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2019-10-15 03:24:52,330 WARN L191 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 80