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/ps4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 23:00:52,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 23:00:52,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 23:00:52,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 23:00:52,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 23:00:52,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 23:00:52,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 23:00:52,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 23:00:52,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 23:00:52,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 23:00:52,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 23:00:52,879 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 23:00:52,880 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 23:00:52,881 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 23:00:52,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 23:00:52,883 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 23:00:52,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 23:00:52,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 23:00:52,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 23:00:52,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 23:00:52,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 23:00:52,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 23:00:52,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 23:00:52,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 23:00:52,894 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 23:00:52,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 23:00:52,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 23:00:52,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 23:00:52,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 23:00:52,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 23:00:52,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 23:00:52,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 23:00:52,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 23:00:52,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 23:00:52,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 23:00:52,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 23:00:52,904 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 23:00:52,917 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 23:00:52,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 23:00:52,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 23:00:52,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 23:00:52,919 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 23:00:52,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 23:00:52,920 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 23:00:52,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 23:00:52,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 23:00:52,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 23:00:52,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 23:00:52,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 23:00:52,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 23:00:52,922 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 23:00:52,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 23:00:52,922 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 23:00:52,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 23:00:52,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 23:00:52,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 23:00:52,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 23:00:52,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 23:00:52,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 23:00:52,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 23:00:52,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 23:00:52,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 23:00:52,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 23:00:52,925 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 23:00:52,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 23:00:52,925 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 23:00:53,226 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 23:00:53,243 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 23:00:53,247 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 23:00:53,249 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 23:00:53,249 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 23:00:53,250 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-10-13 23:00:53,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116383ab6/6ff69505637b4b11938a740bdd4f5da7/FLAGfc06b893f [2019-10-13 23:00:53,755 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 23:00:53,756 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-10-13 23:00:53,762 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116383ab6/6ff69505637b4b11938a740bdd4f5da7/FLAGfc06b893f [2019-10-13 23:00:54,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/116383ab6/6ff69505637b4b11938a740bdd4f5da7 [2019-10-13 23:00:54,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 23:00:54,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 23:00:54,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:54,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 23:00:54,174 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 23:00:54,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@641eaed7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54, skipping insertion in model container [2019-10-13 23:00:54,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,185 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 23:00:54,204 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 23:00:54,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:54,374 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 23:00:54,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 23:00:54,402 INFO L192 MainTranslator]: Completed translation [2019-10-13 23:00:54,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54 WrapperNode [2019-10-13 23:00:54,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 23:00:54,403 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 23:00:54,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 23:00:54,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 23:00:54,495 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,503 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,512 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (1/1) ... [2019-10-13 23:00:54,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 23:00:54,515 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 23:00:54,515 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 23:00:54,515 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 23:00:54,516 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (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 23:00:54,565 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 23:00:54,566 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 23:00:54,566 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 23:00:54,566 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 23:00:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 23:00:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 23:00:54,566 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 23:00:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 23:00:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 23:00:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 23:00:54,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 23:00:54,759 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 23:00:54,759 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 23:00:54,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:54 BoogieIcfgContainer [2019-10-13 23:00:54,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 23:00:54,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 23:00:54,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 23:00:54,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 23:00:54,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:00:54" (1/3) ... [2019-10-13 23:00:54,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a171591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:54, skipping insertion in model container [2019-10-13 23:00:54,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:00:54" (2/3) ... [2019-10-13 23:00:54,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a171591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:00:54, skipping insertion in model container [2019-10-13 23:00:54,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:00:54" (3/3) ... [2019-10-13 23:00:54,771 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-10-13 23:00:54,790 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 23:00:54,806 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 23:00:54,828 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 23:00:54,857 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 23:00:54,858 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 23:00:54,858 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 23:00:54,858 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 23:00:54,858 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 23:00:54,858 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 23:00:54,859 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 23:00:54,859 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 23:00:54,881 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-10-13 23:00:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:54,888 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:54,889 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:54,891 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:54,897 INFO L82 PathProgramCache]: Analyzing trace with hash -122887910, now seen corresponding path program 1 times [2019-10-13 23:00:54,907 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:54,908 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197974685] [2019-10-13 23:00:54,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:54,908 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:54,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:55,001 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 23:00:55,002 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197974685] [2019-10-13 23:00:55,003 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:55,003 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 23:00:55,004 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684944373] [2019-10-13 23:00:55,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 23:00:55,008 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:55,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 23:00:55,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 23:00:55,025 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-10-13 23:00:55,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:55,049 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2019-10-13 23:00:55,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 23:00:55,050 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-13 23:00:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:55,060 INFO L225 Difference]: With dead ends: 35 [2019-10-13 23:00:55,060 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 23:00:55,064 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 23:00:55,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 23:00:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 23:00:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 23:00:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-10-13 23:00:55,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-10-13 23:00:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:55,105 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-10-13 23:00:55,105 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 23:00:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-10-13 23:00:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-13 23:00:55,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:55,107 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:55,108 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:55,109 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-10-13 23:00:55,109 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:55,109 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078013770] [2019-10-13 23:00:55,109 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:55,110 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:55,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:55,117 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:55,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460658065] [2019-10-13 23:00:55,118 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 23:00:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:55,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 23:00:55,172 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:55,259 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 23:00:55,259 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:55,398 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 23:00:55,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078013770] [2019-10-13 23:00:55,399 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:00:55,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460658065] [2019-10-13 23:00:55,399 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 23:00:55,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-13 23:00:55,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034769629] [2019-10-13 23:00:55,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 23:00:55,402 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:00:55,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 23:00:55,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-13 23:00:55,403 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-10-13 23:00:55,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 23:00:55,553 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-10-13 23:00:55,554 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 23:00:55,554 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-10-13 23:00:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 23:00:55,556 INFO L225 Difference]: With dead ends: 27 [2019-10-13 23:00:55,556 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 23:00:55,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 23:00:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 23:00:55,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 23:00:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 23:00:55,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-10-13 23:00:55,565 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2019-10-13 23:00:55,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 23:00:55,565 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-10-13 23:00:55,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 23:00:55,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-10-13 23:00:55,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 23:00:55,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 23:00:55,567 INFO L380 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 23:00:55,770 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 23:00:55,771 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 23:00:55,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 23:00:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-10-13 23:00:55,772 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 23:00:55,773 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542626679] [2019-10-13 23:00:55,773 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:55,773 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 23:00:55,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 23:00:55,781 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 23:00:55,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1689696282] [2019-10-13 23:00:55,784 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 23:00:55,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 23:00:55,832 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-13 23:00:55,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 23:00:55,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:56,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 23:00:56,019 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 23:00:56,117 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:56,324 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:00:58,446 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (+ c_main_~y~0 1))) (let ((.cse2 (* .cse5 .cse5))) (let ((.cse3 (* .cse2 .cse5))) (let ((.cse0 (* (* (+ (* c_main_~y~0 2) 2) .cse5) .cse5)) (.cse1 (* .cse3 .cse5))) (or (not (= (div (+ .cse0 .cse1 .cse2) 4) (+ c_main_~x~0 .cse3))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (let ((.cse4 (+ c_main_~y~0 1))) (= (* main_~k~0 .cse4) (* .cse4 .cse4))) (<= main_~k~0 c_main_~c~0))) (not (= 0 (mod (+ .cse2 .cse0 .cse1) 4)))))))) is different from false [2019-10-13 23:00:58,648 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:01:00,668 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse7 (+ c_main_~y~0 1))) (let ((.cse2 (* .cse7 .cse7))) (let ((.cse3 (* .cse2 .cse7)) (.cse5 (* c_main_~y~0 2))) (let ((.cse0 (* (* (+ .cse5 2) .cse7) .cse7)) (.cse1 (* .cse3 .cse7))) (or (not (= (div (+ .cse0 .cse1 .cse2) 4) (+ c_main_~x~0 .cse3))) (not (= (let ((.cse4 (* c_main_~y~0 c_main_~y~0))) (+ .cse4 (* (* .cse5 c_main_~y~0) c_main_~y~0) (* (* .cse4 c_main_~y~0) c_main_~y~0))) (* 4 c_main_~x~0))) (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (let ((.cse6 (+ c_main_~y~0 1))) (= (* main_~k~0 .cse6) (* .cse6 .cse6))) (<= main_~k~0 c_main_~c~0))) (not (= 0 (mod (+ .cse2 .cse0 .cse1) 4)))))))) is different from false [2019-10-13 23:01:00,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 23:01:00,684 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:01:00,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 23:01:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2019-10-13 23:01:00,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542626679] [2019-10-13 23:01:00,725 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 23:01:00,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689696282] [2019-10-13 23:01:00,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [810407313] [2019-10-13 23:01:00,762 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-13 23:01:00,762 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 23:01:00,768 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 23:01:00,775 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 23:01:00,776 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 23:01:00,824 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-13 23:01:01,315 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 9 for LOIs [2019-10-13 23:01:01,350 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-13 23:01:01,353 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 23:01:01,353 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 23:01:01,354 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initFINAL satisfy 188#true [2019-10-13 23:01:01,354 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertEXIT satisfy 174#(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 23:01:01,354 INFO L193 IcfgInterpreter]: Reachable states at location L5-2 satisfy 169#(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 23:01:01,354 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#true [2019-10-13 23:01:01,355 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#true [2019-10-13 23:01:01,355 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 193#true [2019-10-13 23:01:01,355 INFO L193 IcfgInterpreter]: Reachable states at location L20-3 satisfy 150#(and (<= main_~k~0 2147483647) (<= 0 (+ main_~k~0 2147483648)) (= 0 (+ (* main_~x~0 4) (* (* main_~y~0 main_~y~0) (- 1)) (* (* (* (* main_~y~0 2) main_~y~0) main_~y~0) (- 1)) (* (* (* (* main_~y~0 main_~y~0) main_~y~0) main_~y~0) (- 1)))) (not (< main_~c~0 main_~k~0)) (<= 0 main_~c~0) (<= 0 main_~y~0) (<= 0 main_~x~0)) [2019-10-13 23:01:01,355 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 184#(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 23:01:01,356 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 23:01:01,356 INFO L193 IcfgInterpreter]: Reachable states at location L6 satisfy 179#(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 23:01:01,356 INFO L193 IcfgInterpreter]: Reachable states at location L20-2 satisfy 145#(and (or (and (<= 0 main_~k~0) (<= 1 main_~x~0) (<= main_~c~0 2147483648)) (and (<= main_~c~0 0) (<= 0 main_~c~0) (<= 0 main_~y~0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0))) (or (and (= main_~y~0 0) (<= main_~k~0 2147483647) (<= 0 (+ main_~k~0 2147483648)) (= main_~x~0 0) (<= main_~c~0 0) (= main_~c~0 0) (<= 0 main_~c~0) (<= 0 main_~y~0) (<= main_~x~0 0) (<= 0 main_~x~0) (<= main_~y~0 0)) (and (<= main_~k~0 2147483647) (<= 0 (+ main_~k~0 2147483648)) (<= 1 main_~y~0) (< main_~c~0 (+ main_~k~0 1)) (<= (* (* main_~y~0 main_~y~0) main_~y~0) main_~x~0) (<= 1 main_~c~0) (= (+ (* (+ main_~y~0 (- 1)) (+ main_~y~0 (- 1))) (* 4 (* (* main_~y~0 main_~y~0) main_~y~0)) (* (* (* (+ main_~y~0 (- 1)) (+ main_~y~0 (- 1))) (+ main_~y~0 (- 1))) (+ main_~y~0 (- 1))) (* (* (+ (* main_~y~0 2) (- 2)) (+ main_~y~0 (- 1))) (+ main_~y~0 (- 1)))) (* 4 main_~x~0))))) [2019-10-13 23:01:01,357 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 164#(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 23:01:01,357 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 159#(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 23:01:01,357 INFO L193 IcfgInterpreter]: Reachable states at location L21-1 satisfy 122#(and (<= main_~k~0 2147483647) (<= 0 (+ main_~k~0 2147483648)) (= 0 (+ (* main_~x~0 4) (* (* main_~y~0 main_~y~0) (- 1)) (* (* (* (* main_~y~0 2) main_~y~0) main_~y~0) (- 1)) (* (* (* (* main_~y~0 main_~y~0) main_~y~0) main_~y~0) (- 1)))) (<= 0 main_~c~0) (<= 0 main_~y~0) (<= 0 main_~x~0)) [2019-10-13 23:01:01,357 INFO L193 IcfgInterpreter]: Reachable states at location L21 satisfy 110#(and (<= main_~k~0 2147483647) (<= 0 (+ main_~k~0 2147483648)) (<= 0 main_~c~0) (<= 0 main_~y~0) (<= 0 main_~x~0)) [2019-10-13 23:01:04,780 WARN L191 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2019-10-13 23:01:09,792 WARN L860 $PredicateComparison]: unable to prove that (and (<= c_main_~k~0 2147483647) (<= 0 (+ c_main_~k~0 2147483648)) (<= 0 c_main_~c~0) (<= 0 c_main_~y~0) (<= 0 c_main_~x~0) (= (let ((.cse0 (* c_main_~y~0 c_main_~y~0))) (+ .cse0 (* (* (* c_main_~y~0 2) c_main_~y~0) c_main_~y~0) (* (* .cse0 c_main_~y~0) c_main_~y~0))) (* 4 c_main_~x~0))) is different from true [2019-10-13 23:01:15,911 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 23:01:15,911 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2019-10-13 23:01:15,911 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708518694] [2019-10-13 23:01:15,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 23:01:15,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 23:01:15,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 23:01:15,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=383, Unknown=7, NotChecked=126, Total=600 [2019-10-13 23:01:15,916 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 25 states. [2019-10-13 23:01:22,283 WARN L191 SmtUtils]: Spent 5.98 s on a formula simplification that was a NOOP. DAG size: 50