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/eca-rers2012/Problem16_label07.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:55:17,629 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:55:17,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:55:17,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:55:17,646 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:55:17,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:55:17,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:55:17,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:55:17,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:55:17,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:55:17,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:55:17,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:55:17,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:55:17,656 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:55:17,657 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:55:17,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:55:17,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:55:17,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:55:17,662 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:55:17,666 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:55:17,669 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:55:17,670 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:55:17,674 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:55:17,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:55:17,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:55:17,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:55:17,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:55:17,679 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:55:17,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:55:17,682 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:55:17,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:55:17,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:55:17,683 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:55:17,684 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:55:17,685 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:55:17,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:55:17,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:55:17,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:55:17,686 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:55:17,687 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:55:17,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:55:17,689 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 01:55:17,709 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:55:17,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:55:17,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:55:17,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:55:17,711 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:55:17,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:55:17,711 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:55:17,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:55:17,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:55:17,712 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:55:17,713 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:55:17,713 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:55:17,713 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:55:17,714 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:55:17,714 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:55:17,714 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:55:17,714 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:55:17,714 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:55:17,714 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:55:17,715 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:55:17,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:55:17,715 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:55:17,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:55:17,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:55:17,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:55:17,716 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:55:17,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:55:17,716 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:55:17,717 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 01:55:17,963 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:55:17,984 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:55:17,989 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:55:17,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:55:17,992 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:55:17,993 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-15 01:55:18,062 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27bbdc601/9258a170a3f941a0a668d4a259dde172/FLAG4f655cd9f [2019-10-15 01:55:18,725 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:55:18,726 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label07.c [2019-10-15 01:55:18,742 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27bbdc601/9258a170a3f941a0a668d4a259dde172/FLAG4f655cd9f [2019-10-15 01:55:18,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27bbdc601/9258a170a3f941a0a668d4a259dde172 [2019-10-15 01:55:18,894 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:55:18,896 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:55:18,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:18,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:55:18,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:55:18,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:18" (1/1) ... [2019-10-15 01:55:18,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2e1afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:18, skipping insertion in model container [2019-10-15 01:55:18,906 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:55:18" (1/1) ... [2019-10-15 01:55:18,916 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:55:18,998 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:55:19,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:19,962 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:55:20,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:55:20,253 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:55:20,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20 WrapperNode [2019-10-15 01:55:20,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:55:20,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:55:20,256 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:55:20,256 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:55:20,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,430 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (1/1) ... [2019-10-15 01:55:20,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:55:20,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:55:20,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:55:20,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:55:20,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (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 01:55:20,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:55:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:55:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 01:55:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 01:55:20,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:55:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 01:55:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 01:55:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:55:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:55:20,528 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 01:55:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:55:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:55:20,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:55:42,778 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:55:42,778 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 01:55:42,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:42 BoogieIcfgContainer [2019-10-15 01:55:42,780 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:55:42,782 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:55:42,782 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:55:42,786 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:55:42,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:55:18" (1/3) ... [2019-10-15 01:55:42,787 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba4bc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:42, skipping insertion in model container [2019-10-15 01:55:42,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:55:20" (2/3) ... [2019-10-15 01:55:42,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba4bc27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:55:42, skipping insertion in model container [2019-10-15 01:55:42,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:55:42" (3/3) ... [2019-10-15 01:55:42,790 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label07.c [2019-10-15 01:55:42,801 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:55:42,811 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:55:42,823 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:55:42,862 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:55:42,862 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:55:42,862 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:55:42,862 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:55:42,863 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:55:42,863 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:55:42,863 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:55:42,863 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:55:42,899 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states. [2019-10-15 01:55:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 01:55:42,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:42,909 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:42,911 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:42,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:42,919 INFO L82 PathProgramCache]: Analyzing trace with hash 863566655, now seen corresponding path program 1 times [2019-10-15 01:55:42,932 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:42,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487529730] [2019-10-15 01:55:42,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:42,933 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:42,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:43,218 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 01:55:43,219 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487529730] [2019-10-15 01:55:43,220 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:43,221 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:55:43,221 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999849085] [2019-10-15 01:55:43,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:55:43,227 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:43,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:55:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:55:43,246 INFO L87 Difference]: Start difference. First operand 244 states. Second operand 3 states. [2019-10-15 01:55:44,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:45,000 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2019-10-15 01:55:45,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:55:45,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2019-10-15 01:55:45,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:45,020 INFO L225 Difference]: With dead ends: 718 [2019-10-15 01:55:45,020 INFO L226 Difference]: Without dead ends: 471 [2019-10-15 01:55:45,029 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 01:55:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2019-10-15 01:55:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2019-10-15 01:55:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2019-10-15 01:55:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 862 transitions. [2019-10-15 01:55:45,118 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 862 transitions. Word has length 11 [2019-10-15 01:55:45,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:45,118 INFO L462 AbstractCegarLoop]: Abstraction has 469 states and 862 transitions. [2019-10-15 01:55:45,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:55:45,119 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 862 transitions. [2019-10-15 01:55:45,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:55:45,121 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:45,121 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:45,122 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1738307863, now seen corresponding path program 1 times [2019-10-15 01:55:45,122 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:45,123 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234630615] [2019-10-15 01:55:45,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:45,123 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:45,123 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:45,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:45,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234630615] [2019-10-15 01:55:45,284 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:45,284 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:55:45,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279187738] [2019-10-15 01:55:45,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:55:45,286 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:45,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:55:45,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:45,287 INFO L87 Difference]: Start difference. First operand 469 states and 862 transitions. Second operand 6 states. [2019-10-15 01:55:49,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:49,584 INFO L93 Difference]: Finished difference Result 1905 states and 3621 transitions. [2019-10-15 01:55:49,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 01:55:49,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-10-15 01:55:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:49,605 INFO L225 Difference]: With dead ends: 1905 [2019-10-15 01:55:49,606 INFO L226 Difference]: Without dead ends: 1441 [2019-10-15 01:55:49,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:55:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2019-10-15 01:55:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1405. [2019-10-15 01:55:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1405 states. [2019-10-15 01:55:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 2454 transitions. [2019-10-15 01:55:49,738 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 2454 transitions. Word has length 27 [2019-10-15 01:55:49,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:49,739 INFO L462 AbstractCegarLoop]: Abstraction has 1405 states and 2454 transitions. [2019-10-15 01:55:49,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:55:49,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 2454 transitions. [2019-10-15 01:55:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 01:55:49,742 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:49,742 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 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 01:55:49,742 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:49,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:49,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1795587807, now seen corresponding path program 1 times [2019-10-15 01:55:49,744 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:49,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353077306] [2019-10-15 01:55:49,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:49,745 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:49,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:55:49,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353077306] [2019-10-15 01:55:49,874 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:55:49,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 01:55:49,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314715872] [2019-10-15 01:55:49,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:55:49,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:49,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:55:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:55:49,876 INFO L87 Difference]: Start difference. First operand 1405 states and 2454 transitions. Second operand 6 states. [2019-10-15 01:55:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:52,358 INFO L93 Difference]: Finished difference Result 3783 states and 6869 transitions. [2019-10-15 01:55:52,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 01:55:52,360 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2019-10-15 01:55:52,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:52,379 INFO L225 Difference]: With dead ends: 3783 [2019-10-15 01:55:52,387 INFO L226 Difference]: Without dead ends: 2383 [2019-10-15 01:55:52,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 01:55:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2019-10-15 01:55:52,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2317. [2019-10-15 01:55:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2317 states. [2019-10-15 01:55:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 4075 transitions. [2019-10-15 01:55:52,487 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 4075 transitions. Word has length 31 [2019-10-15 01:55:52,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:52,488 INFO L462 AbstractCegarLoop]: Abstraction has 2317 states and 4075 transitions. [2019-10-15 01:55:52,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:55:52,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 4075 transitions. [2019-10-15 01:55:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-15 01:55:52,499 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:52,500 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:52,500 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1889570729, now seen corresponding path program 1 times [2019-10-15 01:55:52,500 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:52,501 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410232950] [2019-10-15 01:55:52,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:52,501 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:52,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:52,645 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:52,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410232950] [2019-10-15 01:55:52,646 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557723843] [2019-10-15 01:55:52,646 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 01:55:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:52,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:55:52,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:55:52,882 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:52,969 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:52,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:55:52,970 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312176922] [2019-10-15 01:55:52,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:52,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:55:52,971 INFO L87 Difference]: Start difference. First operand 2317 states and 4075 transitions. Second operand 5 states. [2019-10-15 01:55:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:55:55,291 INFO L93 Difference]: Finished difference Result 5610 states and 10077 transitions. [2019-10-15 01:55:55,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 01:55:55,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-10-15 01:55:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:55:55,314 INFO L225 Difference]: With dead ends: 5610 [2019-10-15 01:55:55,314 INFO L226 Difference]: Without dead ends: 3298 [2019-10-15 01:55:55,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 108 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-15 01:55:55,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2019-10-15 01:55:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 3255. [2019-10-15 01:55:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3255 states. [2019-10-15 01:55:55,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3255 states to 3255 states and 5453 transitions. [2019-10-15 01:55:55,421 INFO L78 Accepts]: Start accepts. Automaton has 3255 states and 5453 transitions. Word has length 57 [2019-10-15 01:55:55,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:55:55,421 INFO L462 AbstractCegarLoop]: Abstraction has 3255 states and 5453 transitions. [2019-10-15 01:55:55,421 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 01:55:55,422 INFO L276 IsEmpty]: Start isEmpty. Operand 3255 states and 5453 transitions. [2019-10-15 01:55:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 01:55:55,423 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:55:55,423 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:55:55,627 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:55:55,628 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:55:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:55:55,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1906207545, now seen corresponding path program 1 times [2019-10-15 01:55:55,629 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:55:55,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025333054] [2019-10-15 01:55:55,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:55,630 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:55:55,630 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:55:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:55,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025333054] [2019-10-15 01:55:55,745 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714584631] [2019-10-15 01:55:55,745 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 01:55:55,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:55:55,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 01:55:55,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:55:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 01:55:55,961 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:55:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:55:56,046 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:55:56,046 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-10-15 01:55:56,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075353533] [2019-10-15 01:55:56,047 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 01:55:56,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:55:56,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 01:55:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-10-15 01:55:56,049 INFO L87 Difference]: Start difference. First operand 3255 states and 5453 transitions. Second operand 5 states.