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/array-multidimensional/max-3-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:37:18,069 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:37:18,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:37:18,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:37:18,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:37:18,086 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:37:18,087 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:37:18,089 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:37:18,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:37:18,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:37:18,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:37:18,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:37:18,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:37:18,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:37:18,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:37:18,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:37:18,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:37:18,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:37:18,118 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:37:18,120 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:37:18,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:37:18,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:37:18,123 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:37:18,124 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:37:18,126 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:37:18,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:37:18,127 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:37:18,127 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:37:18,128 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:37:18,129 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:37:18,129 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:37:18,130 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:37:18,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:37:18,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:37:18,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:37:18,132 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:37:18,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:37:18,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:37:18,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:37:18,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:37:18,135 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:37:18,136 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 01:37:18,158 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:37:18,158 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:37:18,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:37:18,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:37:18,160 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:37:18,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:37:18,161 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:37:18,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:37:18,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:37:18,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:37:18,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:37:18,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:37:18,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:37:18,163 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:37:18,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:37:18,164 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:37:18,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:37:18,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:37:18,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:37:18,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:37:18,165 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:37:18,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:37:18,165 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:37:18,165 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:37:18,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:37:18,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:37:18,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:37:18,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:37:18,166 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 01:37:18,446 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:37:18,463 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:37:18,466 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:37:18,468 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:37:18,468 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:37:18,469 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-10-15 01:37:18,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa8c9b60/1d4347f0603f41d6b7fdab2ab08e233a/FLAG4b5d508d9 [2019-10-15 01:37:18,972 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:37:18,972 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/max-3-n-u.c [2019-10-15 01:37:18,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa8c9b60/1d4347f0603f41d6b7fdab2ab08e233a/FLAG4b5d508d9 [2019-10-15 01:37:19,402 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eaa8c9b60/1d4347f0603f41d6b7fdab2ab08e233a [2019-10-15 01:37:19,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:37:19,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:37:19,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:19,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:37:19,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:37:19,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@338e2a78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19, skipping insertion in model container [2019-10-15 01:37:19,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,431 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:37:19,452 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:37:19,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:19,669 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:37:19,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:37:19,799 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:37:19,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19 WrapperNode [2019-10-15 01:37:19,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:37:19,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:37:19,800 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:37:19,800 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:37:19,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,840 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (1/1) ... [2019-10-15 01:37:19,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:37:19,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:37:19,847 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:37:19,847 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:37:19,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (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 01:37:19,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:37:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:37:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:37:19,901 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:37:19,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:37:19,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:37:19,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:37:19,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:37:20,348 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:37:20,348 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-10-15 01:37:20,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:20 BoogieIcfgContainer [2019-10-15 01:37:20,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:37:20,351 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:37:20,351 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:37:20,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:37:20,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:37:19" (1/3) ... [2019-10-15 01:37:20,355 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594119ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:20, skipping insertion in model container [2019-10-15 01:37:20,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:37:19" (2/3) ... [2019-10-15 01:37:20,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@594119ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:37:20, skipping insertion in model container [2019-10-15 01:37:20,356 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:37:20" (3/3) ... [2019-10-15 01:37:20,357 INFO L109 eAbstractionObserver]: Analyzing ICFG max-3-n-u.c [2019-10-15 01:37:20,367 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:37:20,374 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:37:20,385 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:37:20,405 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:37:20,405 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:37:20,405 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:37:20,406 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:37:20,406 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:37:20,406 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:37:20,406 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:37:20,406 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:37:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-10-15 01:37:20,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 01:37:20,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:20,426 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:20,428 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:20,434 INFO L82 PathProgramCache]: Analyzing trace with hash 816370470, now seen corresponding path program 1 times [2019-10-15 01:37:20,444 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:20,444 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124403263] [2019-10-15 01:37:20,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:20,445 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:20,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:20,520 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:20,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379089930] [2019-10-15 01:37:20,521 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 01:37:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:20,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:20,615 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:20,669 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 01:37:20,669 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:20,695 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 01:37:20,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124403263] [2019-10-15 01:37:20,696 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:20,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379089930] [2019-10-15 01:37:20,697 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:20,697 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:37:20,698 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167189795] [2019-10-15 01:37:20,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:37:20,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:20,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:37:20,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:20,721 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 4 states. [2019-10-15 01:37:20,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:20,798 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2019-10-15 01:37:20,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:37:20,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2019-10-15 01:37:20,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:20,810 INFO L225 Difference]: With dead ends: 46 [2019-10-15 01:37:20,810 INFO L226 Difference]: Without dead ends: 26 [2019-10-15 01:37:20,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:37:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-15 01:37:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-15 01:37:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-15 01:37:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2019-10-15 01:37:20,854 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 14 [2019-10-15 01:37:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:20,854 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2019-10-15 01:37:20,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:37:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2019-10-15 01:37:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-15 01:37:20,856 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:20,856 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:21,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:21,058 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1178834430, now seen corresponding path program 1 times [2019-10-15 01:37:21,059 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:21,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525200848] [2019-10-15 01:37:21,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:21,059 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:21,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:21,077 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:21,078 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [838091616] [2019-10-15 01:37:21,078 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 01:37:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:21,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:21,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:21,164 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:37:21,185 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525200848] [2019-10-15 01:37:21,185 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:21,186 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838091616] [2019-10-15 01:37:21,186 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:21,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:21,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838301476] [2019-10-15 01:37:21,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:21,188 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:21,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:21,189 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2019-10-15 01:37:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:21,344 INFO L93 Difference]: Finished difference Result 60 states and 92 transitions. [2019-10-15 01:37:21,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:21,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-10-15 01:37:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:21,349 INFO L225 Difference]: With dead ends: 60 [2019-10-15 01:37:21,349 INFO L226 Difference]: Without dead ends: 42 [2019-10-15 01:37:21,350 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-15 01:37:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2019-10-15 01:37:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:37:21,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 55 transitions. [2019-10-15 01:37:21,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 55 transitions. Word has length 18 [2019-10-15 01:37:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:21,383 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 55 transitions. [2019-10-15 01:37:21,383 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:21,383 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 55 transitions. [2019-10-15 01:37:21,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 01:37:21,384 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:21,385 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:21,587 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:21,587 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:21,588 INFO L82 PathProgramCache]: Analyzing trace with hash -2110141746, now seen corresponding path program 1 times [2019-10-15 01:37:21,588 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:21,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404287333] [2019-10-15 01:37:21,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:21,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:21,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:21,597 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:21,597 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116816372] [2019-10-15 01:37:21,597 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:21,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:37:21,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:21,681 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:21,710 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 01:37:21,710 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404287333] [2019-10-15 01:37:21,710 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:21,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116816372] [2019-10-15 01:37:21,711 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:21,711 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:21,711 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141158027] [2019-10-15 01:37:21,712 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:21,712 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:21,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:21,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:21,713 INFO L87 Difference]: Start difference. First operand 40 states and 55 transitions. Second operand 6 states. [2019-10-15 01:37:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:21,827 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2019-10-15 01:37:21,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:21,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-10-15 01:37:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:21,828 INFO L225 Difference]: With dead ends: 94 [2019-10-15 01:37:21,829 INFO L226 Difference]: Without dead ends: 62 [2019-10-15 01:37:21,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-15 01:37:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-10-15 01:37:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-10-15 01:37:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-10-15 01:37:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2019-10-15 01:37:21,845 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 26 [2019-10-15 01:37:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:21,846 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2019-10-15 01:37:21,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:21,846 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2019-10-15 01:37:21,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:37:21,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:21,848 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:22,052 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:22,052 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:22,053 INFO L82 PathProgramCache]: Analyzing trace with hash 26027342, now seen corresponding path program 1 times [2019-10-15 01:37:22,053 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:22,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215347208] [2019-10-15 01:37:22,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,053 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:22,054 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:22,061 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:22,062 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679985405] [2019-10-15 01:37:22,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:22,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:22,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:22,165 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-15 01:37:22,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215347208] [2019-10-15 01:37:22,221 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:22,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679985405] [2019-10-15 01:37:22,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1829734477] [2019-10-15 01:37:22,247 INFO L162 IcfgInterpreter]: Started Sifa with 17 locations of interest [2019-10-15 01:37:22,248 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:22,253 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:22,260 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:22,260 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:22,477 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:23,139 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:37:23,152 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:23,159 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:23,385 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:37:23,385 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6, 6] total 18 [2019-10-15 01:37:23,385 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285356868] [2019-10-15 01:37:23,386 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:37:23,386 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:37:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:37:23,387 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 10 states. [2019-10-15 01:37:23,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:23,830 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2019-10-15 01:37:23,831 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:37:23,831 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-10-15 01:37:23,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:23,832 INFO L225 Difference]: With dead ends: 88 [2019-10-15 01:37:23,832 INFO L226 Difference]: Without dead ends: 63 [2019-10-15 01:37:23,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:23,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-15 01:37:23,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-15 01:37:23,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:37:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-10-15 01:37:23,854 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-10-15 01:37:23,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:23,855 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-10-15 01:37:23,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:37:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-10-15 01:37:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-15 01:37:23,858 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:23,859 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:24,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:24,065 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:24,066 INFO L82 PathProgramCache]: Analyzing trace with hash 224246983, now seen corresponding path program 1 times [2019-10-15 01:37:24,066 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:24,067 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986506537] [2019-10-15 01:37:24,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,067 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:24,067 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:24,083 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:24,083 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607084128] [2019-10-15 01:37:24,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:24,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:37:24,169 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:24,200 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:37:24,200 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:24,250 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-15 01:37:24,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986506537] [2019-10-15 01:37:24,251 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:24,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607084128] [2019-10-15 01:37:24,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [390033065] [2019-10-15 01:37:24,257 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:24,257 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:24,258 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:24,258 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:24,258 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:24,317 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:25,254 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:25,270 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:25,274 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:25,851 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:25,852 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-10-15 01:37:25,852 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563224237] [2019-10-15 01:37:25,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:37:25,853 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:25,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:37:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:37:25,854 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 26 states. [2019-10-15 01:37:27,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:27,153 INFO L93 Difference]: Finished difference Result 167 states and 241 transitions. [2019-10-15 01:37:27,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-15 01:37:27,154 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2019-10-15 01:37:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:27,155 INFO L225 Difference]: With dead ends: 167 [2019-10-15 01:37:27,156 INFO L226 Difference]: Without dead ends: 116 [2019-10-15 01:37:27,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=383, Invalid=1423, Unknown=0, NotChecked=0, Total=1806 [2019-10-15 01:37:27,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2019-10-15 01:37:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2019-10-15 01:37:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-15 01:37:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 134 transitions. [2019-10-15 01:37:27,202 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 134 transitions. Word has length 44 [2019-10-15 01:37:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:27,202 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 134 transitions. [2019-10-15 01:37:27,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:37:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 134 transitions. [2019-10-15 01:37:27,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-15 01:37:27,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:27,204 INFO L380 BasicCegarLoop]: trace histogram [24, 12, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:27,411 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:27,412 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash -831900985, now seen corresponding path program 2 times [2019-10-15 01:37:27,413 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:27,413 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049632565] [2019-10-15 01:37:27,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:27,413 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:27,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:27,423 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:27,423 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464903795] [2019-10-15 01:37:27,424 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:27,498 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:37:27,498 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:27,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:27,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:27,540 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-15 01:37:27,541 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2019-10-15 01:37:27,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049632565] [2019-10-15 01:37:27,576 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:27,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464903795] [2019-10-15 01:37:27,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881431113] [2019-10-15 01:37:27,579 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:37:27,579 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:27,579 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:27,580 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:27,580 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:27,619 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:28,169 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 01:37:28,180 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:28,184 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:28,727 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:28,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 17] total 24 [2019-10-15 01:37:28,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365439247] [2019-10-15 01:37:28,729 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:37:28,730 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:28,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:37:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:37:28,731 INFO L87 Difference]: Start difference. First operand 109 states and 134 transitions. Second operand 24 states. [2019-10-15 01:37:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:30,246 INFO L93 Difference]: Finished difference Result 393 states and 501 transitions. [2019-10-15 01:37:30,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:37:30,247 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 68 [2019-10-15 01:37:30,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:30,252 INFO L225 Difference]: With dead ends: 393 [2019-10-15 01:37:30,252 INFO L226 Difference]: Without dead ends: 326 [2019-10-15 01:37:30,256 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=336, Invalid=1224, Unknown=0, NotChecked=0, Total=1560 [2019-10-15 01:37:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2019-10-15 01:37:30,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 199. [2019-10-15 01:37:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-15 01:37:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 239 transitions. [2019-10-15 01:37:30,315 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 239 transitions. Word has length 68 [2019-10-15 01:37:30,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:30,317 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 239 transitions. [2019-10-15 01:37:30,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:37:30,318 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 239 transitions. [2019-10-15 01:37:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 01:37:30,330 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:30,331 INFO L380 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:30,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:30,537 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:30,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:30,538 INFO L82 PathProgramCache]: Analyzing trace with hash 442605018, now seen corresponding path program 3 times [2019-10-15 01:37:30,538 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:30,538 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392132753] [2019-10-15 01:37:30,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:30,539 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:30,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:30,552 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:30,553 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820294843] [2019-10-15 01:37:30,553 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:30,847 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 01:37:30,847 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:30,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 68 conjunts are in the unsatisfiable core [2019-10-15 01:37:30,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:35,626 WARN L191 SmtUtils]: Spent 2.65 s on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2019-10-15 01:37:51,053 WARN L191 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 34 DAG size of output: 23