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/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:36,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:36,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:36,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:36,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:36,779 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:36,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:36,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:36,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:36,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:36,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:36,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:36,803 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:36,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:36,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:36,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:36,809 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:36,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:36,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:36,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:36,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:36,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:36,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:36,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:36,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:36:36,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:36:36,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:36:36,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:36:36,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:36:36,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:36:36,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:36:36,839 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:36:36,840 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:36:36,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:36:36,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:36:36,843 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:36:36,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:36:36,844 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:36:36,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:36,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:36,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:36,850 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 01:36:36,870 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:36,871 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:36,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:36,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:36,875 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:36,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:36,875 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:36,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:36,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:36,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:36,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:36,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:36,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:36,878 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:36,878 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:36,878 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:36,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:36,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:36,879 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:36,879 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:36,879 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:36,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:36,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:36,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:36,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:36,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:36,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:36,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:36,881 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 01:36:37,179 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:37,198 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:37,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:37,208 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:37,208 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:37,209 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-10-15 01:36:37,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0a8dc55/53bf2e6549554830b2516651e0de3522/FLAG9f785459f [2019-10-15 01:36:37,744 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:37,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-10-15 01:36:37,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0a8dc55/53bf2e6549554830b2516651e0de3522/FLAG9f785459f [2019-10-15 01:36:38,125 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b0a8dc55/53bf2e6549554830b2516651e0de3522 [2019-10-15 01:36:38,137 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:38,139 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:38,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:38,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:38,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:38,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,148 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38, skipping insertion in model container [2019-10-15 01:36:38,149 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,158 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:38,187 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:38,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:38,386 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:38,418 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:38,518 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:38,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38 WrapperNode [2019-10-15 01:36:38,519 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:38,520 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:38,520 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:38,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:38,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,543 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (1/1) ... [2019-10-15 01:36:38,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:38,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:38,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:38,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:38,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (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 01:36:38,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 01:36:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:38,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:38,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:39,140 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:39,141 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-10-15 01:36:39,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:39 BoogieIcfgContainer [2019-10-15 01:36:39,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:39,144 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:39,144 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:39,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:39,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:38" (1/3) ... [2019-10-15 01:36:39,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184a49a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:39, skipping insertion in model container [2019-10-15 01:36:39,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:38" (2/3) ... [2019-10-15 01:36:39,149 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@184a49a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:39, skipping insertion in model container [2019-10-15 01:36:39,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:39" (3/3) ... [2019-10-15 01:36:39,151 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2019-10-15 01:36:39,161 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:39,169 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:39,180 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:39,206 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:39,206 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:39,206 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:39,207 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:39,207 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:39,207 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:39,207 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:39,207 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-15 01:36:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 01:36:39,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:39,234 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:39,236 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:39,241 INFO L82 PathProgramCache]: Analyzing trace with hash 360876189, now seen corresponding path program 1 times [2019-10-15 01:36:39,248 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:39,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919626957] [2019-10-15 01:36:39,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:39,249 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:39,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:39,329 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:39,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2083753108] [2019-10-15 01:36:39,330 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 01:36:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:39,401 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:39,407 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:39,462 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 01:36:39,463 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:39,489 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 01:36:39,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919626957] [2019-10-15 01:36:39,490 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:39,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083753108] [2019-10-15 01:36:39,492 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:39,492 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:36:39,492 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560737813] [2019-10-15 01:36:39,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:36:39,498 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:39,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:36:39,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:39,516 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2019-10-15 01:36:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:39,671 INFO L93 Difference]: Finished difference Result 52 states and 78 transitions. [2019-10-15 01:36:39,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:36:39,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-15 01:36:39,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:39,690 INFO L225 Difference]: With dead ends: 52 [2019-10-15 01:36:39,690 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:36:39,693 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 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 01:36:39,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:36:39,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-15 01:36:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:36:39,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 42 transitions. [2019-10-15 01:36:39,730 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 42 transitions. Word has length 15 [2019-10-15 01:36:39,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:39,731 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 42 transitions. [2019-10-15 01:36:39,731 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:36:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 42 transitions. [2019-10-15 01:36:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-15 01:36:39,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:39,733 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:39,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:39,944 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:39,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:39,944 INFO L82 PathProgramCache]: Analyzing trace with hash -716774221, now seen corresponding path program 1 times [2019-10-15 01:36:39,945 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:39,945 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435167036] [2019-10-15 01:36:39,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:39,945 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:39,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:39,955 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:39,956 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037164176] [2019-10-15 01:36:39,956 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 01:36:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:40,006 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:40,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:40,041 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 01:36:40,041 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:40,074 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 01:36:40,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435167036] [2019-10-15 01:36:40,075 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:40,075 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037164176] [2019-10-15 01:36:40,075 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:40,076 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:40,076 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299635423] [2019-10-15 01:36:40,078 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:40,078 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:40,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:40,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:40,079 INFO L87 Difference]: Start difference. First operand 29 states and 42 transitions. Second operand 6 states. [2019-10-15 01:36:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:40,259 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2019-10-15 01:36:40,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:40,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-10-15 01:36:40,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:40,263 INFO L225 Difference]: With dead ends: 70 [2019-10-15 01:36:40,264 INFO L226 Difference]: Without dead ends: 49 [2019-10-15 01:36:40,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 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 01:36:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-15 01:36:40,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2019-10-15 01:36:40,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-15 01:36:40,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 57 transitions. [2019-10-15 01:36:40,281 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 57 transitions. Word has length 19 [2019-10-15 01:36:40,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:40,281 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 57 transitions. [2019-10-15 01:36:40,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:40,281 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 57 transitions. [2019-10-15 01:36:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 01:36:40,283 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:40,283 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:40,494 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,495 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:40,495 INFO L82 PathProgramCache]: Analyzing trace with hash 785875971, now seen corresponding path program 1 times [2019-10-15 01:36:40,495 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:40,496 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132389595] [2019-10-15 01:36:40,496 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,496 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:40,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:40,519 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:40,520 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555251045] [2019-10-15 01:36:40,520 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 01:36:40,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:40,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:40,566 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:40,586 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 01:36:40,586 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:40,615 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 01:36:40,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132389595] [2019-10-15 01:36:40,616 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:40,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555251045] [2019-10-15 01:36:40,617 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:40,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:40,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323665334] [2019-10-15 01:36:40,618 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:40,618 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:40,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:40,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:40,619 INFO L87 Difference]: Start difference. First operand 40 states and 57 transitions. Second operand 6 states. [2019-10-15 01:36:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:40,775 INFO L93 Difference]: Finished difference Result 99 states and 156 transitions. [2019-10-15 01:36:40,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:40,775 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-10-15 01:36:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:40,777 INFO L225 Difference]: With dead ends: 99 [2019-10-15 01:36:40,777 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 01:36:40,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 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 01:36:40,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 01:36:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2019-10-15 01:36:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-10-15 01:36:40,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 75 transitions. [2019-10-15 01:36:40,792 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 75 transitions. Word has length 27 [2019-10-15 01:36:40,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:40,793 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 75 transitions. [2019-10-15 01:36:40,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:40,793 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 75 transitions. [2019-10-15 01:36:40,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-15 01:36:40,795 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:40,795 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:40,999 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:40,999 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:41,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1101140611, now seen corresponding path program 1 times [2019-10-15 01:36:41,001 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:41,001 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354912190] [2019-10-15 01:36:41,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,001 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:41,002 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:41,010 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:41,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1736571125] [2019-10-15 01:36:41,011 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 01:36:41,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:41,090 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:41,100 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:41,143 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 01:36:41,143 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:41,190 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 01:36:41,191 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354912190] [2019-10-15 01:36:41,191 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:41,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736571125] [2019-10-15 01:36:41,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343421868] [2019-10-15 01:36:41,226 INFO L162 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-10-15 01:36:41,226 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:41,233 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:41,241 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:41,242 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:41,438 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:42,289 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:42,306 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:42,318 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:42,576 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:42,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6] total 19 [2019-10-15 01:36:42,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153090130] [2019-10-15 01:36:42,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 01:36:42,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:42,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 01:36:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-15 01:36:42,579 INFO L87 Difference]: Start difference. First operand 56 states and 75 transitions. Second operand 11 states. [2019-10-15 01:36:43,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:43,200 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2019-10-15 01:36:43,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:36:43,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 35 [2019-10-15 01:36:43,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:43,202 INFO L225 Difference]: With dead ends: 92 [2019-10-15 01:36:43,202 INFO L226 Difference]: Without dead ends: 67 [2019-10-15 01:36:43,205 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2019-10-15 01:36:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-15 01:36:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 58. [2019-10-15 01:36:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-10-15 01:36:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2019-10-15 01:36:43,234 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 35 [2019-10-15 01:36:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:43,234 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2019-10-15 01:36:43,235 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 01:36:43,235 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2019-10-15 01:36:43,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:43,236 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:43,237 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:43,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:43,441 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash 828192686, now seen corresponding path program 1 times [2019-10-15 01:36:43,441 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:43,442 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722193539] [2019-10-15 01:36:43,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:43,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:43,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:43,450 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:43,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1818642059] [2019-10-15 01:36:43,450 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 01:36:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:43,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:43,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:36:43,550 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:36:43,582 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722193539] [2019-10-15 01:36:43,583 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:43,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818642059] [2019-10-15 01:36:43,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [943063997] [2019-10-15 01:36:43,585 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:36:43,585 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:43,586 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:43,586 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:43,586 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:43,618 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:44,088 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:44,341 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:44,345 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:44,349 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:44,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:44,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6] total 20 [2019-10-15 01:36:44,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782407846] [2019-10-15 01:36:44,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:36:44,691 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:44,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:36:44,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:36:44,692 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 12 states. [2019-10-15 01:36:45,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:45,293 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2019-10-15 01:36:45,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-15 01:36:45,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-15 01:36:45,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:45,295 INFO L225 Difference]: With dead ends: 95 [2019-10-15 01:36:45,295 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:36:45,298 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2019-10-15 01:36:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:36:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2019-10-15 01:36:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-10-15 01:36:45,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2019-10-15 01:36:45,321 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 37 [2019-10-15 01:36:45,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:45,322 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2019-10-15 01:36:45,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:36:45,322 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2019-10-15 01:36:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:45,323 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:45,324 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:45,524 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:45,525 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:45,526 INFO L82 PathProgramCache]: Analyzing trace with hash 128888073, now seen corresponding path program 1 times [2019-10-15 01:36:45,526 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:45,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367485593] [2019-10-15 01:36:45,527 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:45,527 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:45,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:45,535 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:45,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017580551] [2019-10-15 01:36:45,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:36:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:45,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:45,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:45,666 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:36:45,667 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-10-15 01:36:45,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367485593] [2019-10-15 01:36:45,716 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:45,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017580551] [2019-10-15 01:36:45,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782581429] [2019-10-15 01:36:45,718 INFO L162 IcfgInterpreter]: Started Sifa with 19 locations of interest [2019-10-15 01:36:45,718 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:45,719 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:45,719 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:45,721 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:45,754 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:46,259 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:46,263 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:46,268 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:46,690 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:46,691 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6] total 20 [2019-10-15 01:36:46,691 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730809027] [2019-10-15 01:36:46,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-15 01:36:46,692 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:46,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-15 01:36:46,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2019-10-15 01:36:46,693 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand 12 states. [2019-10-15 01:36:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:47,287 INFO L93 Difference]: Finished difference Result 98 states and 134 transitions. [2019-10-15 01:36:47,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-15 01:36:47,288 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 37 [2019-10-15 01:36:47,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:47,289 INFO L225 Difference]: With dead ends: 98 [2019-10-15 01:36:47,289 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:36:47,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2019-10-15 01:36:47,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:36:47,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2019-10-15 01:36:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-15 01:36:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2019-10-15 01:36:47,303 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 37 [2019-10-15 01:36:47,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:47,303 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2019-10-15 01:36:47,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-15 01:36:47,303 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2019-10-15 01:36:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 01:36:47,305 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:47,305 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:47,508 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:47,508 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash -205373722, now seen corresponding path program 1 times [2019-10-15 01:36:47,509 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:47,509 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412699144] [2019-10-15 01:36:47,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:47,509 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:47,510 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:47,526 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:47,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423708179] [2019-10-15 01:36:47,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 01:36:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:47,636 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:47,646 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:47,671 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 01:36:47,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-15 01:36:47,701 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412699144] [2019-10-15 01:36:47,702 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:47,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423708179] [2019-10-15 01:36:47,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860069776] [2019-10-15 01:36:47,704 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:36:47,704 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:47,704 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:47,705 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:47,705 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:47,722 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:48,090 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,099 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,103 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,124 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,124 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,126 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,200 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,208 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,227 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,228 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,228 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,280 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,285 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,308 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,308 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,309 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,356 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,360 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,389 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,389 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,392 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,431 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,436 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,454 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,454 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,455 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,499 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,504 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,525 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,531 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,533 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,574 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,580 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,609 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,610 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,611 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,642 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,649 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:36:48,656 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:48,664 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:48,668 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:49,034 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2019-10-15 01:36:49,491 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:49,493 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 17] total 26 [2019-10-15 01:36:49,494 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507932407] [2019-10-15 01:36:49,494 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-15 01:36:49,495 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-15 01:36:49,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2019-10-15 01:36:49,495 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 26 states. [2019-10-15 01:36:49,763 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2019-10-15 01:36:50,239 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2019-10-15 01:36:50,917 WARN L191 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-10-15 01:36:51,114 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2019-10-15 01:36:51,395 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 62 [2019-10-15 01:36:51,584 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-10-15 01:36:51,818 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2019-10-15 01:36:52,067 WARN L191 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 60 [2019-10-15 01:36:52,260 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2019-10-15 01:36:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:52,541 INFO L93 Difference]: Finished difference Result 202 states and 319 transitions. [2019-10-15 01:36:52,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-15 01:36:52,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 39 [2019-10-15 01:36:52,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:52,544 INFO L225 Difference]: With dead ends: 202 [2019-10-15 01:36:52,544 INFO L226 Difference]: Without dead ends: 151 [2019-10-15 01:36:52,548 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2019-10-15 01:36:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-15 01:36:52,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 107. [2019-10-15 01:36:52,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-15 01:36:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 135 transitions. [2019-10-15 01:36:52,577 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 135 transitions. Word has length 39 [2019-10-15 01:36:52,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:52,577 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 135 transitions. [2019-10-15 01:36:52,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-15 01:36:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 135 transitions. [2019-10-15 01:36:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 01:36:52,581 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:52,581 INFO L380 BasicCegarLoop]: trace histogram [24, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:52,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:52,794 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:52,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:52,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1330936983, now seen corresponding path program 1 times [2019-10-15 01:36:52,794 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:52,795 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946379258] [2019-10-15 01:36:52,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:52,795 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:52,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:52,807 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:52,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053279630] [2019-10-15 01:36:52,808 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:52,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:52,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-15 01:36:52,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-10-15 01:36:53,046 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 399 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2019-10-15 01:36:53,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946379258] [2019-10-15 01:36:53,135 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:53,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053279630] [2019-10-15 01:36:53,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [286920401] [2019-10-15 01:36:53,138 INFO L162 IcfgInterpreter]: Started Sifa with 20 locations of interest [2019-10-15 01:36:53,138 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:53,139 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:53,139 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:53,139 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:53,156 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:53,674 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2019-10-15 01:36:54,207 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:36:54,212 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:54,214 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:54,556 WARN L191 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2019-10-15 01:36:54,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:54,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 17] total 34 [2019-10-15 01:36:54,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526623978] [2019-10-15 01:36:54,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-15 01:36:54,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:54,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-15 01:36:54,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2019-10-15 01:36:54,971 INFO L87 Difference]: Start difference. First operand 107 states and 135 transitions. Second operand 34 states. [2019-10-15 01:36:55,266 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2019-10-15 01:36:56,640 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2019-10-15 01:36:57,029 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2019-10-15 01:36:57,793 WARN L191 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-10-15 01:36:58,112 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:36:58,601 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:36:58,881 WARN L191 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-10-15 01:36:59,335 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-10-15 01:36:59,790 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:00,142 WARN L191 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2019-10-15 01:37:00,492 WARN L191 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:00,925 WARN L191 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-10-15 01:37:01,302 WARN L191 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-10-15 01:37:01,707 WARN L191 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:02,086 WARN L191 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-10-15 01:37:02,434 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2019-10-15 01:37:02,787 WARN L191 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2019-10-15 01:37:03,117 WARN L191 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2019-10-15 01:37:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:03,648 INFO L93 Difference]: Finished difference Result 378 states and 584 transitions. [2019-10-15 01:37:03,648 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-10-15 01:37:03,649 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 56 [2019-10-15 01:37:03,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:03,651 INFO L225 Difference]: With dead ends: 378 [2019-10-15 01:37:03,652 INFO L226 Difference]: Without dead ends: 285 [2019-10-15 01:37:03,654 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1285, Invalid=4265, Unknown=0, NotChecked=0, Total=5550 [2019-10-15 01:37:03,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2019-10-15 01:37:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 195. [2019-10-15 01:37:03,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2019-10-15 01:37:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 240 transitions. [2019-10-15 01:37:03,682 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 240 transitions. Word has length 56 [2019-10-15 01:37:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:03,683 INFO L462 AbstractCegarLoop]: Abstraction has 195 states and 240 transitions. [2019-10-15 01:37:03,683 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-15 01:37:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 240 transitions. [2019-10-15 01:37:03,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-10-15 01:37:03,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:03,684 INFO L380 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:03,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:03,889 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:03,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:03,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2084699497, now seen corresponding path program 2 times [2019-10-15 01:37:03,890 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:03,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437286344] [2019-10-15 01:37:03,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:03,891 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:03,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:03,900 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:03,900 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28892192] [2019-10-15 01:37:03,900 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:04,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2019-10-15 01:37:04,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:37:04,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:37:04,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:04,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2019-10-15 01:37:04,146 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:04,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1791 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2019-10-15 01:37:04,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437286344] [2019-10-15 01:37:04,192 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:04,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28892192] [2019-10-15 01:37:04,193 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:37:04,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:37:04,193 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421067352] [2019-10-15 01:37:04,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:37:04,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:37:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:37:04,194 INFO L87 Difference]: Start difference. First operand 195 states and 240 transitions. Second operand 6 states. [2019-10-15 01:37:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:04,374 INFO L93 Difference]: Finished difference Result 390 states and 500 transitions. [2019-10-15 01:37:04,374 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:37:04,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-10-15 01:37:04,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:04,377 INFO L225 Difference]: With dead ends: 390 [2019-10-15 01:37:04,378 INFO L226 Difference]: Without dead ends: 286 [2019-10-15 01:37:04,379 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-15 01:37:04,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-15 01:37:04,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 199. [2019-10-15 01:37:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-15 01:37:04,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 246 transitions. [2019-10-15 01:37:04,417 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 246 transitions. Word has length 88 [2019-10-15 01:37:04,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:04,417 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 246 transitions. [2019-10-15 01:37:04,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:37:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 246 transitions. [2019-10-15 01:37:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-15 01:37:04,418 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:04,419 INFO L380 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:04,622 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:04,622 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 312575021, now seen corresponding path program 1 times [2019-10-15 01:37:04,623 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:04,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265109664] [2019-10-15 01:37:04,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:04,624 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:04,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:04,633 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:04,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879282646] [2019-10-15 01:37:04,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:37:04,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-15 01:37:04,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:37:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 682 proven. 105 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-10-15 01:37:05,014 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:37:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1795 backedges. 682 proven. 105 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2019-10-15 01:37:05,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265109664] [2019-10-15 01:37:05,291 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:37:05,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879282646] [2019-10-15 01:37:05,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1198288882] [2019-10-15 01:37:05,293 INFO L162 IcfgInterpreter]: Started Sifa with 21 locations of interest [2019-10-15 01:37:05,293 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:37:05,294 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:37:05,294 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:37:05,294 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:37:05,317 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:37:05,822 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2019-10-15 01:37:06,294 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,295 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,314 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,314 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,339 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,339 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,382 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,382 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,414 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,414 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,464 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,466 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,493 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,493 WARN L222 IntervalDomain]: Interval conversion did not stabilize in 6 iterations. Over-approximation may be very coarse. [2019-10-15 01:37:06,512 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 29 for LOIs [2019-10-15 01:37:06,518 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:37:06,520 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:37:06,861 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2019-10-15 01:37:07,172 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:37:07,173 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 50 [2019-10-15 01:37:07,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348626316] [2019-10-15 01:37:07,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-15 01:37:07,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:37:07,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-15 01:37:07,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=1860, Unknown=0, NotChecked=0, Total=2450 [2019-10-15 01:37:07,176 INFO L87 Difference]: Start difference. First operand 199 states and 246 transitions. Second operand 50 states. [2019-10-15 01:37:07,487 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 60 [2019-10-15 01:37:09,557 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2019-10-15 01:37:10,146 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-10-15 01:37:10,365 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:10,608 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:10,797 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-10-15 01:37:11,045 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2019-10-15 01:37:11,303 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:11,517 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2019-10-15 01:37:11,785 WARN L191 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:12,066 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:12,379 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:12,677 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:12,996 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:13,334 WARN L191 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:13,632 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:13,943 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:14,253 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:14,577 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:14,873 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:15,170 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:15,476 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:15,785 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:16,095 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:16,399 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:16,697 WARN L191 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:17,006 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:17,291 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:17,575 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2019-10-15 01:37:17,846 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:18,135 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2019-10-15 01:37:18,402 WARN L191 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63