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/nla-digbench/egcd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:04:26,421 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:04:26,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:04:26,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:04:26,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:04:26,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:04:26,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:04:26,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:04:26,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:04:26,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:04:26,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:04:26,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:04:26,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:04:26,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:04:26,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:04:26,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:04:26,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:04:26,478 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:04:26,480 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:04:26,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:04:26,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:04:26,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:04:26,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:04:26,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:04:26,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 03:04:26,499 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 03:04:26,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 03:04:26,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 03:04:26,503 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 03:04:26,504 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 03:04:26,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 03:04:26,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 03:04:26,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 03:04:26,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 03:04:26,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 03:04:26,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 03:04:26,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 03:04:26,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 03:04:26,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:04:26,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:04:26,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:04:26,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:04:26,548 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:04:26,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:04:26,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:04:26,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:04:26,555 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:04:26,556 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:04:26,556 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:04:26,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:04:26,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:04:26,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:04:26,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:04:26,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:04:26,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:04:26,557 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:04:26,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:04:26,557 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:04:26,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:04:26,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:04:26,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:04:26,560 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:04:26,560 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:04:26,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:26,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:04:26,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:04:26,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:04:26,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:04:26,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:04:26,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:04:26,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:04:26,857 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:04:26,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:04:26,874 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:04:26,876 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:04:26,876 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:04:26,877 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-10-15 03:04:26,953 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fc2deb4/50087c8bf8ae4e75808880031fc73022/FLAGe3afb16dc [2019-10-15 03:04:27,439 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:04:27,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-10-15 03:04:27,446 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fc2deb4/50087c8bf8ae4e75808880031fc73022/FLAGe3afb16dc [2019-10-15 03:04:27,798 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88fc2deb4/50087c8bf8ae4e75808880031fc73022 [2019-10-15 03:04:27,809 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:04:27,813 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:04:27,816 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:27,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:04:27,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:04:27,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:27" (1/1) ... [2019-10-15 03:04:27,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@663de0f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:27, skipping insertion in model container [2019-10-15 03:04:27,825 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:27" (1/1) ... [2019-10-15 03:04:27,833 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:04:27,854 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:04:28,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:28,084 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:04:28,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:28,119 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:04:28,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28 WrapperNode [2019-10-15 03:04:28,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:28,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:04:28,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:04:28,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:04:28,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,229 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,242 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... [2019-10-15 03:04:28,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:04:28,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:04:28,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:04:28,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:04:28,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:28,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:04:28,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:04:28,297 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:04:28,297 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:04:28,297 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:04:28,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:04:28,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:04:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:04:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:04:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:04:28,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:04:28,628 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:04:28,628 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:04:28,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:28 BoogieIcfgContainer [2019-10-15 03:04:28,631 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:04:28,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:04:28,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:04:28,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:04:28,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:04:27" (1/3) ... [2019-10-15 03:04:28,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2b4afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:28, skipping insertion in model container [2019-10-15 03:04:28,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:28" (2/3) ... [2019-10-15 03:04:28,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2b4afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:28, skipping insertion in model container [2019-10-15 03:04:28,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:28" (3/3) ... [2019-10-15 03:04:28,639 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-10-15 03:04:28,648 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:04:28,656 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:04:28,668 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:04:28,703 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:04:28,703 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:04:28,704 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:04:28,704 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:04:28,704 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:04:28,704 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:04:28,704 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:04:28,704 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:04:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-15 03:04:28,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:28,730 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:28,731 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:28,733 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:28,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1537636194, now seen corresponding path program 1 times [2019-10-15 03:04:28,756 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:28,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674650942] [2019-10-15 03:04:28,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:28,757 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:28,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:28,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674650942] [2019-10-15 03:04:28,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:28,887 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 03:04:28,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321231088] [2019-10-15 03:04:28,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:04:28,892 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:28,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:04:28,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:28,906 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-15 03:04:28,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:28,933 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2019-10-15 03:04:28,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:04:28,934 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 03:04:28,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:28,945 INFO L225 Difference]: With dead ends: 43 [2019-10-15 03:04:28,945 INFO L226 Difference]: Without dead ends: 20 [2019-10-15 03:04:28,949 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-15 03:04:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-15 03:04:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-15 03:04:28,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-10-15 03:04:28,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2019-10-15 03:04:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:28,988 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-10-15 03:04:28,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:04:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-10-15 03:04:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:28,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:28,990 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:28,990 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:28,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:28,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1587685074, now seen corresponding path program 1 times [2019-10-15 03:04:28,991 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:28,992 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116917801] [2019-10-15 03:04:28,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:28,992 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:28,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:29,003 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:29,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549151380] [2019-10-15 03:04:29,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:29,102 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:04:29,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:29,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:29,193 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:29,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116917801] [2019-10-15 03:04:29,306 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:29,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549151380] [2019-10-15 03:04:29,307 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:29,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 03:04:29,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41179624] [2019-10-15 03:04:29,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:04:29,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:29,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:04:29,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:29,312 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 8 states. [2019-10-15 03:04:29,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:29,460 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2019-10-15 03:04:29,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:29,461 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-15 03:04:29,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:29,462 INFO L225 Difference]: With dead ends: 35 [2019-10-15 03:04:29,463 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:04:29,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:04:29,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-15 03:04:29,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 03:04:29,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2019-10-15 03:04:29,479 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 10 [2019-10-15 03:04:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:29,480 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2019-10-15 03:04:29,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:04:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2019-10-15 03:04:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-15 03:04:29,481 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:29,481 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:29,688 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:29,690 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1592529048, now seen corresponding path program 1 times [2019-10-15 03:04:29,692 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:29,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101542189] [2019-10-15 03:04:29,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:29,693 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:29,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:29,703 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:29,703 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711179850] [2019-10-15 03:04:29,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:29,741 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:04:29,743 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:29,845 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:29,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101542189] [2019-10-15 03:04:29,980 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:29,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711179850] [2019-10-15 03:04:29,980 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:29,981 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 03:04:29,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313921668] [2019-10-15 03:04:29,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:04:29,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:29,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:04:29,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:29,983 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand 8 states. [2019-10-15 03:04:30,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:30,118 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-10-15 03:04:30,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:30,119 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-15 03:04:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:30,120 INFO L225 Difference]: With dead ends: 39 [2019-10-15 03:04:30,120 INFO L226 Difference]: Without dead ends: 37 [2019-10-15 03:04:30,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-15 03:04:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-15 03:04:30,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-15 03:04:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2019-10-15 03:04:30,144 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 15 [2019-10-15 03:04:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:30,145 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2019-10-15 03:04:30,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:04:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2019-10-15 03:04:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:04:30,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:30,148 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:30,354 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:30,355 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:30,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2040988462, now seen corresponding path program 1 times [2019-10-15 03:04:30,357 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:30,357 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158327760] [2019-10-15 03:04:30,357 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,358 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:30,370 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:30,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901027100] [2019-10-15 03:04:30,371 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 03:04:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:30,407 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-15 03:04:30,420 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:30,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:04:30,468 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 03:04:30,525 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158327760] [2019-10-15 03:04:30,526 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:30,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901027100] [2019-10-15 03:04:30,526 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:30,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 03:04:30,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116710896] [2019-10-15 03:04:30,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:04:30,528 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:30,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:04:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:30,529 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 8 states. [2019-10-15 03:04:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:30,674 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2019-10-15 03:04:30,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:30,674 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-15 03:04:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:30,675 INFO L225 Difference]: With dead ends: 43 [2019-10-15 03:04:30,676 INFO L226 Difference]: Without dead ends: 39 [2019-10-15 03:04:30,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:30,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-15 03:04:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-15 03:04:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-15 03:04:30,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-15 03:04:30,685 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 20 [2019-10-15 03:04:30,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:30,686 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-15 03:04:30,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-15 03:04:30,686 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-15 03:04:30,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-15 03:04:30,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:30,687 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:30,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:30,891 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:30,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash 113727669, now seen corresponding path program 1 times [2019-10-15 03:04:30,894 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:30,894 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033832032] [2019-10-15 03:04:30,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:30,906 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:30,907 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616920074] [2019-10-15 03:04:30,907 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 03:04:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:30,936 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 03:04:30,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:04:30,953 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:04:30,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033832032] [2019-10-15 03:04:30,993 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:30,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616920074] [2019-10-15 03:04:30,994 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:30,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-15 03:04:30,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727886468] [2019-10-15 03:04:30,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 03:04:30,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:30,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 03:04:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-15 03:04:30,996 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2019-10-15 03:04:31,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:31,045 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-15 03:04:31,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:31,046 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-15 03:04:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:31,047 INFO L225 Difference]: With dead ends: 45 [2019-10-15 03:04:31,048 INFO L226 Difference]: Without dead ends: 43 [2019-10-15 03:04:31,048 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 03:04:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-15 03:04:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-15 03:04:31,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-15 03:04:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-10-15 03:04:31,058 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 26 [2019-10-15 03:04:31,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:31,059 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-10-15 03:04:31,059 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 03:04:31,059 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-10-15 03:04:31,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-15 03:04:31,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:31,060 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:31,264 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:31,265 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:31,266 INFO L82 PathProgramCache]: Analyzing trace with hash 620933510, now seen corresponding path program 1 times [2019-10-15 03:04:31,266 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:31,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257664865] [2019-10-15 03:04:31,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:31,267 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:31,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:31,280 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:31,283 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83096856] [2019-10-15 03:04:31,283 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 03:04:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:31,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-15 03:04:31,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:31,443 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 03:04:31,477 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:31,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-15 03:04:31,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257664865] [2019-10-15 03:04:31,555 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:31,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83096856] [2019-10-15 03:04:31,555 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-15 03:04:31,556 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-15 03:04:31,556 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392155568] [2019-10-15 03:04:31,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 03:04:31,557 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:31,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 03:04:31,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-15 03:04:31,557 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 5 states. [2019-10-15 03:04:31,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:31,641 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-10-15 03:04:31,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 03:04:31,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-10-15 03:04:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:31,643 INFO L225 Difference]: With dead ends: 49 [2019-10-15 03:04:31,643 INFO L226 Difference]: Without dead ends: 47 [2019-10-15 03:04:31,644 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:04:31,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-15 03:04:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-15 03:04:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 03:04:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-10-15 03:04:31,653 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 27 [2019-10-15 03:04:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:31,653 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-10-15 03:04:31,654 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 03:04:31,654 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-10-15 03:04:31,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-15 03:04:31,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:31,655 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:31,855 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:31,856 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:31,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:31,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1857063759, now seen corresponding path program 1 times [2019-10-15 03:04:31,858 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:31,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604958913] [2019-10-15 03:04:31,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:31,859 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:31,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:31,866 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:31,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139048096] [2019-10-15 03:04:31,867 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 03:04:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:31,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-15 03:04:31,905 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:04:31,954 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:04:32,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604958913] [2019-10-15 03:04:32,065 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:32,066 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139048096] [2019-10-15 03:04:32,066 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:32,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-10-15 03:04:32,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525843347] [2019-10-15 03:04:32,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 03:04:32,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:32,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 03:04:32,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-15 03:04:32,068 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2019-10-15 03:04:32,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:32,194 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2019-10-15 03:04:32,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 03:04:32,195 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-15 03:04:32,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:32,196 INFO L225 Difference]: With dead ends: 57 [2019-10-15 03:04:32,196 INFO L226 Difference]: Without dead ends: 45 [2019-10-15 03:04:32,197 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-15 03:04:32,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-15 03:04:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-15 03:04:32,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-15 03:04:32,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-15 03:04:32,205 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 31 [2019-10-15 03:04:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:32,205 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-15 03:04:32,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 03:04:32,205 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-15 03:04:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:04:32,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:32,207 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:32,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:32,424 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:32,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1363628224, now seen corresponding path program 2 times [2019-10-15 03:04:32,425 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:32,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084391701] [2019-10-15 03:04:32,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:32,425 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:32,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:32,432 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:32,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1515388732] [2019-10-15 03:04:32,433 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 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 03:04:32,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 03:04:32,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:04:32,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-15 03:04:32,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:32,540 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:04:32,566 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:32,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-15 03:04:32,716 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084391701] [2019-10-15 03:04:32,717 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:32,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515388732] [2019-10-15 03:04:32,717 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1431285007] [2019-10-15 03:04:32,771 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 03:04:32,771 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:04:32,777 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:04:32,785 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:04:32,786 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:04:32,835 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:04:40,791 WARN L191 SmtUtils]: Spent 6.19 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:44,228 WARN L191 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:44,706 WARN L191 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:46,106 WARN L191 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:46,294 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:48,271 WARN L191 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:49,427 WARN L191 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:49,611 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-10-15 03:04:50,748 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:53,017 WARN L191 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:04:53,200 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2019-10-15 03:04:53,222 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:04:53,224 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:04:53,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 03:04:53,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2019-10-15 03:04:53,607 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092406914] [2019-10-15 03:04:53,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-15 03:04:53,609 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-15 03:04:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:04:53,610 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2019-10-15 03:05:01,570 WARN L191 SmtUtils]: Spent 7.79 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-10-15 03:05:04,141 WARN L191 SmtUtils]: Spent 2.12 s on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-10-15 03:05:05,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:05:05,145 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-10-15 03:05:05,145 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 03:05:05,145 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2019-10-15 03:05:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:05:05,148 INFO L225 Difference]: With dead ends: 58 [2019-10-15 03:05:05,148 INFO L226 Difference]: Without dead ends: 56 [2019-10-15 03:05:05,149 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2019-10-15 03:05:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-15 03:05:05,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-15 03:05:05,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-15 03:05:05,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-15 03:05:05,158 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 32 [2019-10-15 03:05:05,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:05:05,159 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-15 03:05:05,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-15 03:05:05,159 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-15 03:05:05,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 03:05:05,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:05:05,161 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:05:05,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:05:05,365 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:05:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:05:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -440709754, now seen corresponding path program 3 times [2019-10-15 03:05:05,366 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:05:05,366 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228095371] [2019-10-15 03:05:05,366 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:05,367 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:05:05,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:05:05,378 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:05:05,378 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [961874887] [2019-10-15 03:05:05,379 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:05:05,498 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:05:05,499 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:05:05,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-15 03:05:05,502 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:05:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:05:07,952 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:05:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-15 03:05:08,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228095371] [2019-10-15 03:05:08,250 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:05:08,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961874887] [2019-10-15 03:05:08,250 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1982287300] [2019-10-15 03:05:08,252 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 03:05:08,252 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:05:08,252 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:05:08,253 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:05:08,253 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:05:08,266 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:05:09,615 WARN L191 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:05:10,630 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-15 03:05:11,321 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22