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-f4eb214f-m [2019-10-13 23:00:33,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:33,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:33,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:33,747 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:33,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:33,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:33,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:33,764 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:33,765 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:33,766 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:33,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:33,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:33,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:33,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:33,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:33,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:33,778 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:33,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:33,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:33,788 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:33,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:33,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:33,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:33,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:33,802 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:00:33,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:00:33,805 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:00:33,806 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:00:33,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:00:33,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:00:33,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:00:33,811 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:00:33,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:33,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:33,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:33,814 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 [2019-10-13 23:00:33,835 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:33,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:33,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:33,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:33,840 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:33,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:33,840 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:33,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:33,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:33,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:33,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:33,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:33,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:33,843 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:33,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:33,843 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:33,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:33,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:33,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:33,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:33,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:33,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:33,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:33,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:33,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:33,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:33,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:33,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:33,846 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 [2019-10-13 23:00:34,158 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:34,171 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:34,175 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:34,176 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:34,177 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:34,177 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd.c [2019-10-13 23:00:34,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdce6be1/6e3be19011574565a8f9e28d35470708/FLAG689edfe65 [2019-10-13 23:00:34,613 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:34,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd.c [2019-10-13 23:00:34,621 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdce6be1/6e3be19011574565a8f9e28d35470708/FLAG689edfe65 [2019-10-13 23:00:34,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fdce6be1/6e3be19011574565a8f9e28d35470708 [2019-10-13 23:00:34,993 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:34,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:34,996 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:34,996 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:35,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:35,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:34" (1/1) ... [2019-10-13 23:00:35,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18dcd92d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35, skipping insertion in model container [2019-10-13 23:00:35,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:34" (1/1) ... [2019-10-13 23:00:35,013 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:35,038 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:35,207 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:35,212 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:35,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:35,250 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:35,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35 WrapperNode [2019-10-13 23:00:35,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:35,251 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:35,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:35,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:35,266 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (1/1) ... [2019-10-13 23:00:35,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:35,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:35,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:35,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:35,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (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 [2019-10-13 23:00:35,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:35,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:35,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:35,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:00:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 23:00:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:35,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:35,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:35,740 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:35,740 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 23:00:35,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:35 BoogieIcfgContainer [2019-10-13 23:00:35,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:35,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:35,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:35,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:35,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:34" (1/3) ... [2019-10-13 23:00:35,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fd70de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:35, skipping insertion in model container [2019-10-13 23:00:35,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:35" (2/3) ... [2019-10-13 23:00:35,749 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fd70de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:35, skipping insertion in model container [2019-10-13 23:00:35,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:35" (3/3) ... [2019-10-13 23:00:35,750 INFO L109 eAbstractionObserver]: Analyzing ICFG egcd.c [2019-10-13 23:00:35,761 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:35,770 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:35,781 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:35,805 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:35,806 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:35,806 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:35,806 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:35,806 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:35,807 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:35,807 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:35,807 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-10-13 23:00:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:35,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:35,836 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:35,838 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1537636194, now seen corresponding path program 1 times [2019-10-13 23:00:35,857 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:35,857 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711545579] [2019-10-13 23:00:35,857 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:35,858 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:35,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:35,971 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711545579] [2019-10-13 23:00:35,972 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:35,973 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:00:35,973 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861155027] [2019-10-13 23:00:35,978 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:00:35,978 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:35,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:00:35,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:35,995 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-10-13 23:00:36,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:36,019 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2019-10-13 23:00:36,019 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:00:36,020 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 23:00:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:36,030 INFO L225 Difference]: With dead ends: 43 [2019-10-13 23:00:36,031 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 23:00:36,034 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 [2019-10-13 23:00:36,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 23:00:36,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 23:00:36,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 23:00:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2019-10-13 23:00:36,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2019-10-13 23:00:36,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:36,081 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2019-10-13 23:00:36,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:00:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2019-10-13 23:00:36,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:36,083 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:36,083 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:36,083 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:36,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1587685074, now seen corresponding path program 1 times [2019-10-13 23:00:36,085 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:36,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339837263] [2019-10-13 23:00:36,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,085 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:36,097 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:36,098 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [536540779] [2019-10-13 23:00:36,098 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 [2019-10-13 23:00:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:36,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:00:36,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:36,260 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:36,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:36,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339837263] [2019-10-13 23:00:36,356 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:36,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536540779] [2019-10-13 23:00:36,357 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:36,357 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-13 23:00:36,357 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218244485] [2019-10-13 23:00:36,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:00:36,360 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:00:36,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:00:36,362 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 8 states. [2019-10-13 23:00:36,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:36,486 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2019-10-13 23:00:36,487 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:36,487 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-13 23:00:36,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:36,488 INFO L225 Difference]: With dead ends: 35 [2019-10-13 23:00:36,489 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 23:00:36,490 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 [2019-10-13 23:00:36,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 23:00:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2019-10-13 23:00:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 23:00:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2019-10-13 23:00:36,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 10 [2019-10-13 23:00:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:36,506 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2019-10-13 23:00:36,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:00:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2019-10-13 23:00:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 23:00:36,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:36,507 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:36,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:36,721 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1592529048, now seen corresponding path program 1 times [2019-10-13 23:00:36,723 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:36,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914031179] [2019-10-13 23:00:36,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,724 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:36,724 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:36,740 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:36,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766232431] [2019-10-13 23:00:36,741 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 [2019-10-13 23:00:36,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:36,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:00:36,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:36,827 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 23:00:36,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914031179] [2019-10-13 23:00:36,918 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:36,918 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766232431] [2019-10-13 23:00:36,918 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:36,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-13 23:00:36,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404911801] [2019-10-13 23:00:36,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:00:36,923 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:00:36,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:00:36,924 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand 8 states. [2019-10-13 23:00:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:37,014 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2019-10-13 23:00:37,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:37,015 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-13 23:00:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:37,017 INFO L225 Difference]: With dead ends: 39 [2019-10-13 23:00:37,017 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 23:00:37,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:00:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 23:00:37,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-10-13 23:00:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 23:00:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2019-10-13 23:00:37,029 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 15 [2019-10-13 23:00:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:37,030 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2019-10-13 23:00:37,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:00:37,030 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2019-10-13 23:00:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 23:00:37,031 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:37,031 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:37,232 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:37,233 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:37,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2040988462, now seen corresponding path program 1 times [2019-10-13 23:00:37,234 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:37,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679158262] [2019-10-13 23:00:37,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:37,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:37,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:37,243 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:37,243 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689100035] [2019-10-13 23:00:37,243 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 [2019-10-13 23:00:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:37,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 23:00:37,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:00:37,349 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:00:37,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679158262] [2019-10-13 23:00:37,398 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:37,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689100035] [2019-10-13 23:00:37,399 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:37,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-13 23:00:37,399 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978147314] [2019-10-13 23:00:37,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:00:37,400 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:00:37,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:00:37,401 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand 8 states. [2019-10-13 23:00:37,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:37,494 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2019-10-13 23:00:37,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:37,495 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2019-10-13 23:00:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:37,497 INFO L225 Difference]: With dead ends: 43 [2019-10-13 23:00:37,497 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 23:00:37,498 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 [2019-10-13 23:00:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 23:00:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-13 23:00:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 23:00:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2019-10-13 23:00:37,510 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 20 [2019-10-13 23:00:37,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:37,511 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2019-10-13 23:00:37,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:00:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2019-10-13 23:00:37,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 23:00:37,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:37,512 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:37,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:37,716 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash 113727669, now seen corresponding path program 1 times [2019-10-13 23:00:37,717 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:37,718 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706920235] [2019-10-13 23:00:37,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:37,718 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:37,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:37,726 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:37,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064307376] [2019-10-13 23:00:37,727 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 [2019-10-13 23:00:37,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:37,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 23:00:37,774 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:00:37,808 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:00:37,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706920235] [2019-10-13 23:00:37,845 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:37,845 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064307376] [2019-10-13 23:00:37,846 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:37,846 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-10-13 23:00:37,846 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419136366] [2019-10-13 23:00:37,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 23:00:37,847 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:37,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 23:00:37,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 23:00:37,848 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 7 states. [2019-10-13 23:00:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:37,897 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-13 23:00:37,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:37,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2019-10-13 23:00:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:37,899 INFO L225 Difference]: With dead ends: 45 [2019-10-13 23:00:37,899 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 23:00:37,899 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 [2019-10-13 23:00:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 23:00:37,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 23:00:37,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 23:00:37,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2019-10-13 23:00:37,910 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 26 [2019-10-13 23:00:37,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:37,910 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2019-10-13 23:00:37,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 23:00:37,910 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2019-10-13 23:00:37,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 23:00:37,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:37,912 INFO L380 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:38,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:38,120 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:38,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:38,121 INFO L82 PathProgramCache]: Analyzing trace with hash 620933510, now seen corresponding path program 1 times [2019-10-13 23:00:38,121 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:38,121 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862788941] [2019-10-13 23:00:38,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:38,122 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:38,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:38,129 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:38,130 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1842908700] [2019-10-13 23:00:38,130 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 [2019-10-13 23:00:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:38,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 23:00:38,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:38,220 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 23:00:38,243 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:38,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 23:00:38,315 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862788941] [2019-10-13 23:00:38,315 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:38,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842908700] [2019-10-13 23:00:38,316 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 23:00:38,316 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-13 23:00:38,316 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573772282] [2019-10-13 23:00:38,317 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 23:00:38,317 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 23:00:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:00:38,318 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 5 states. [2019-10-13 23:00:38,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:38,382 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2019-10-13 23:00:38,382 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 23:00:38,382 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-10-13 23:00:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:38,384 INFO L225 Difference]: With dead ends: 49 [2019-10-13 23:00:38,384 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 23:00:38,384 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 [2019-10-13 23:00:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 23:00:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-13 23:00:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 23:00:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-10-13 23:00:38,393 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 27 [2019-10-13 23:00:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:38,394 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-10-13 23:00:38,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 23:00:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-10-13 23:00:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 23:00:38,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:38,396 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] [2019-10-13 23:00:38,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:38,600 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:38,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:38,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1857063759, now seen corresponding path program 1 times [2019-10-13 23:00:38,601 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:38,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823646544] [2019-10-13 23:00:38,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:38,602 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:38,602 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:38,613 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:38,614 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510353155] [2019-10-13 23:00:38,614 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 [2019-10-13 23:00:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:38,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 23:00:38,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:38,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:00:38,720 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:00:38,806 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823646544] [2019-10-13 23:00:38,806 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:38,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510353155] [2019-10-13 23:00:38,807 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:38,807 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-10-13 23:00:38,807 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737461025] [2019-10-13 23:00:38,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 23:00:38,808 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:38,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 23:00:38,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-10-13 23:00:38,809 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand 10 states. [2019-10-13 23:00:38,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:38,921 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2019-10-13 23:00:38,921 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:00:38,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-10-13 23:00:38,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:38,922 INFO L225 Difference]: With dead ends: 57 [2019-10-13 23:00:38,922 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 23:00:38,923 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 [2019-10-13 23:00:38,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 23:00:38,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-13 23:00:38,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 23:00:38,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 23:00:38,931 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 31 [2019-10-13 23:00:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:38,932 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 23:00:38,932 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 23:00:38,932 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 23:00:38,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 23:00:38,933 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:38,933 INFO L380 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:39,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:39,137 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:39,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:39,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1363628224, now seen corresponding path program 2 times [2019-10-13 23:00:39,139 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:39,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152214852] [2019-10-13 23:00:39,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:39,140 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:39,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:39,148 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:39,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033478788] [2019-10-13 23:00:39,148 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 [2019-10-13 23:00:39,201 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-13 23:00:39,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:00:39,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-13 23:00:39,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:39,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:00:39,273 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:39,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-13 23:00:39,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152214852] [2019-10-13 23:00:39,371 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:39,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033478788] [2019-10-13 23:00:39,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1096515882] [2019-10-13 23:00:39,397 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 23:00:39,397 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:00:39,403 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:00:39,411 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:00:39,412 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:00:39,474 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 23:00:43,300 WARN L191 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:44,502 WARN L191 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:46,592 WARN L191 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:47,772 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:48,527 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 27 [2019-10-13 23:00:48,917 WARN L191 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:49,946 WARN L191 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:50,947 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2019-10-13 23:00:51,625 WARN L191 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-10-13 23:00:51,792 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2019-10-13 23:00:52,344 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:54,579 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:00:54,738 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2019-10-13 23:00:54,757 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 23:00:54,759 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:00:54,759 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:00:54,760 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 1791#true [2019-10-13 23:00:54,761 INFO L193 IcfgInterpreter]: Reachable states at location L36-2 satisfy 1731#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:00:54,761 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertEXIT satisfy 1777#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 23:00:54,762 INFO L193 IcfgInterpreter]: Reachable states at location L6-2 satisfy 1772#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 23:00:54,762 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 23:00:54,763 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 23:00:54,763 INFO L193 IcfgInterpreter]: Reachable states at location L7 satisfy 1782#(and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:00:54,763 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 1796#true [2019-10-13 23:00:54,764 INFO L193 IcfgInterpreter]: Reachable states at location L29-1 satisfy 1758#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:00:54,764 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:00:54,764 INFO L193 IcfgInterpreter]: Reachable states at location L6 satisfy 1767#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (or (and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1)))) [2019-10-13 23:00:54,765 INFO L193 IcfgInterpreter]: Reachable states at location L29 satisfy 1739#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:00:54,765 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 1762#(and (or (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)))) [2019-10-13 23:00:54,765 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 1530#(and (<= 0 (+ main_~a~0 2147483646)) (<= 0 (+ main_~b~0 2147483646)) (and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= main_~y~0 2147483647) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0)) (<= 1 main_~p~0)) [2019-10-13 23:00:54,766 INFO L193 IcfgInterpreter]: Reachable states at location L31 satisfy 1723#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:00:54,766 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 1787#(and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:00:54,952 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 23:00:54,952 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2019-10-13 23:00:54,953 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726990578] [2019-10-13 23:00:54,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 23:00:54,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:54,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 23:00:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-10-13 23:00:54,959 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 15 states. [2019-10-13 23:00:58,479 WARN L191 SmtUtils]: Spent 3.39 s on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2019-10-13 23:01:01,042 WARN L191 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2019-10-13 23:01:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:01:01,102 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-10-13 23:01:01,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 23:01:01,102 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2019-10-13 23:01:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:01:01,103 INFO L225 Difference]: With dead ends: 58 [2019-10-13 23:01:01,104 INFO L226 Difference]: Without dead ends: 56 [2019-10-13 23:01:01,104 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2019-10-13 23:01:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-10-13 23:01:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2019-10-13 23:01:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 23:01:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-10-13 23:01:01,113 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 32 [2019-10-13 23:01:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:01:01,113 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-10-13 23:01:01,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 23:01:01,114 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-10-13 23:01:01,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 23:01:01,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:01:01,115 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:01:01,327 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:01:01,327 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:01:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:01:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -440709754, now seen corresponding path program 3 times [2019-10-13 23:01:01,328 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:01:01,328 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564954910] [2019-10-13 23:01:01,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:01,329 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:01:01,329 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:01:01,337 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:01:01,338 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [623762549] [2019-10-13 23:01:01,338 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 [2019-10-13 23:01:01,423 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 23:01:01,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 23:01:01,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 23:01:01,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:01:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:01:03,583 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:01:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 17 proven. 15 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 23:01:03,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564954910] [2019-10-13 23:01:03,801 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:01:03,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623762549] [2019-10-13 23:01:03,802 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1666859693] [2019-10-13 23:01:03,803 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 23:01:03,803 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:01:03,804 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:01:03,804 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:01:03,804 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:01:03,819 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 23:01:04,850 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:01:06,319 WARN L191 SmtUtils]: Spent 651.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:01:08,355 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:01:11,107 WARN L191 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:01:11,356 WARN L191 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:01:12,276 WARN L191 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2019-10-13 23:01:12,399 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2019-10-13 23:01:12,420 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 23:01:12,422 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:01:12,422 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:01:12,422 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 1653#true [2019-10-13 23:01:12,423 INFO L193 IcfgInterpreter]: Reachable states at location L36-2 satisfy 1593#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:01:12,423 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertEXIT satisfy 1639#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 23:01:12,424 INFO L193 IcfgInterpreter]: Reachable states at location L6-2 satisfy 1634#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (not (= 0 __VERIFIER_assert_~cond)) (<= 0 |__VERIFIER_assert_#in~cond|) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1)) [2019-10-13 23:01:12,424 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 23:01:12,424 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 23:01:12,425 INFO L193 IcfgInterpreter]: Reachable states at location L7 satisfy 1644#(and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:01:12,425 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 1658#true [2019-10-13 23:01:12,425 INFO L193 IcfgInterpreter]: Reachable states at location L29-1 satisfy 1620#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:01:12,425 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:01:12,426 INFO L193 IcfgInterpreter]: Reachable states at location L6 satisfy 1629#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (or (and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond)) (and (<= 1 __VERIFIER_assert_~cond) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1)))) [2019-10-13 23:01:12,426 INFO L193 IcfgInterpreter]: Reachable states at location L29 satisfy 1601#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= 0 (+ main_~a~0 2147483646)) (<= main_~y~0 2147483647) (<= 0 (+ main_~b~0 2147483646)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:01:12,426 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 1624#(and (or (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0)) (or (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)) (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1)))) [2019-10-13 23:01:12,426 INFO L193 IcfgInterpreter]: Reachable states at location L30 satisfy 1392#(and (<= 0 (+ main_~a~0 2147483646)) (<= 0 (+ main_~b~0 2147483646)) (and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 1 main_~y~0) (<= main_~y~0 2147483647)) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:01:12,426 INFO L193 IcfgInterpreter]: Reachable states at location L31 satisfy 1585#(and (<= main_~q~0 0) (<= main_~x~0 2147483647) (<= 0 (+ main_~a~0 2147483646)) (<= 1 main_~y~0) (<= 0 (+ main_~b~0 2147483646)) (<= main_~y~0 2147483647) (<= main_~r~0 0) (<= 1 main_~x~0) (<= 1 main_~s~0) (<= 1 main_~p~0)) [2019-10-13 23:01:12,427 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 1649#(and (<= __VERIFIER_assert_~cond 0) (<= |__VERIFIER_assert_#in~cond| 0) (or (and (= |__VERIFIER_assert_#in~cond| 1) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 0 __VERIFIER_assert_~cond)) [2019-10-13 23:01:12,644 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 23:01:12,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 20 [2019-10-13 23:01:12,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984736113] [2019-10-13 23:01:12,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 23:01:12,646 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:12,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 23:01:12,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=313, Unknown=1, NotChecked=0, Total=380 [2019-10-13 23:01:12,647 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 20 states.