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/fermat2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:04:27,735 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:04:27,738 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:04:27,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:04:27,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:04:27,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:04:27,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:04:27,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:04:27,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:04:27,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:04:27,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:04:27,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:04:27,778 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:04:27,779 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:04:27,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:04:27,783 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:04:27,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:04:27,788 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:04:27,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:04:27,797 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:04:27,798 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:04:27,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:04:27,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:04:27,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:04:27,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:04:27,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:04:27,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:04:27,827 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:04:27,828 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 03:04:27,852 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:04:27,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:04:27,854 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:04:27,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:04:27,855 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:04:27,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:04:27,855 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:04:27,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:04:27,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:04:27,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:04:27,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:04:27,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:04:27,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:04:27,858 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:04:27,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:04:27,858 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:04:27,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:04:27,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:04:27,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:04:27,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:04:27,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:04:27,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:27,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:04:27,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:04:27,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:04:27,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:04:27,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:04:27,861 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:04:27,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-15 03:04:28,204 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:04:28,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:04:28,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:04:28,233 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:04:28,234 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:04:28,235 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/fermat2.c [2019-10-15 03:04:28,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/446828eab/65cbdaf3c9cd4bb28ede26f89c8a4edb/FLAGa0fbeca70 [2019-10-15 03:04:28,812 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:04:28,813 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/fermat2.c [2019-10-15 03:04:28,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/446828eab/65cbdaf3c9cd4bb28ede26f89c8a4edb/FLAGa0fbeca70 [2019-10-15 03:04:29,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/446828eab/65cbdaf3c9cd4bb28ede26f89c8a4edb [2019-10-15 03:04:29,208 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:04:29,210 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:04:29,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:29,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:04:29,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:04:29,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37701bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29, skipping insertion in model container [2019-10-15 03:04:29,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,229 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:04:29,248 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:04:29,413 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:29,418 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:04:29,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:04:29,453 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:04:29,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29 WrapperNode [2019-10-15 03:04:29,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:04:29,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:04:29,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:04:29,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:04:29,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,578 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... [2019-10-15 03:04:29,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:04:29,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:04:29,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:04:29,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:04:29,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:04:29,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:04:29,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:04:29,648 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:04:29,648 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:04:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:04:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2019-10-15 03:04:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:04:29,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:04:29,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:04:29,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:04:29,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:04:29,903 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:04:29,903 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:04:29,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:29 BoogieIcfgContainer [2019-10-15 03:04:29,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:04:29,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:04:29,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:04:29,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:04:29,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:04:29" (1/3) ... [2019-10-15 03:04:29,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467fcdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:29, skipping insertion in model container [2019-10-15 03:04:29,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:04:29" (2/3) ... [2019-10-15 03:04:29,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467fcdfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:04:29, skipping insertion in model container [2019-10-15 03:04:29,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:04:29" (3/3) ... [2019-10-15 03:04:29,914 INFO L109 eAbstractionObserver]: Analyzing ICFG fermat2.c [2019-10-15 03:04:29,925 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:04:29,934 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:04:29,946 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:04:29,972 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:04:29,973 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:04:29,973 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:04:29,973 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:04:29,973 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:04:29,973 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:04:29,974 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:04:29,974 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:04:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-10-15 03:04:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:29,997 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:29,998 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:29,999 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:30,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:30,006 INFO L82 PathProgramCache]: Analyzing trace with hash -835862760, now seen corresponding path program 1 times [2019-10-15 03:04:30,015 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:30,016 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86934340] [2019-10-15 03:04:30,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,016 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:30,088 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:30,088 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061865458] [2019-10-15 03:04:30,089 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:30,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2019-10-15 03:04:30,139 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:30,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:30,159 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:04:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:04:30,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86934340] [2019-10-15 03:04:30,192 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:04:30,192 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061865458] [2019-10-15 03:04:30,193 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:04:30,193 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-10-15 03:04:30,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679720641] [2019-10-15 03:04:30,199 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 03:04:30,199 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:04:30,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 03:04:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:30,243 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-10-15 03:04:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:04:30,309 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2019-10-15 03:04:30,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 03:04:30,314 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-10-15 03:04:30,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:04:30,338 INFO L225 Difference]: With dead ends: 33 [2019-10-15 03:04:30,339 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:04:30,346 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 03:04:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:04:30,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:04:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:04:30,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-10-15 03:04:30,413 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2019-10-15 03:04:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:04:30,415 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-10-15 03:04:30,415 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 03:04:30,415 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-10-15 03:04:30,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:04:30,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:04:30,417 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:04:30,630 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:30,631 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:04:30,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:04:30,632 INFO L82 PathProgramCache]: Analyzing trace with hash -871939661, now seen corresponding path program 1 times [2019-10-15 03:04:30,633 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:04:30,633 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563795806] [2019-10-15 03:04:30,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,634 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:04:30,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:04:30,638 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 03:04:30,639 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32423581] [2019-10-15 03:04:30,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:04:30,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:04:30,679 WARN L254 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-15 03:04:30,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:04:30,968 WARN L191 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2019-10-15 03:04:30,985 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:04:44,027 WARN L191 SmtUtils]: Spent 7.86 s on a formula simplification that was a NOOP. DAG size: 34 [2019-10-15 03:05:02,664 WARN L191 SmtUtils]: Spent 10.66 s on a formula simplification that was a NOOP. DAG size: 34 [2019-10-15 03:05:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:05:03,714 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:05:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:05:09,660 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563795806] [2019-10-15 03:05:09,661 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 03:05:09,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32423581] [2019-10-15 03:05:09,661 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:05:09,661 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-10-15 03:05:09,662 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038244720] [2019-10-15 03:05:09,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-15 03:05:09,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:05:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-15 03:05:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=36, Unknown=6, NotChecked=0, Total=56 [2019-10-15 03:05:09,665 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2019-10-15 03:05:16,177 WARN L191 SmtUtils]: Spent 6.43 s on a formula simplification. DAG size of input: 42 DAG size of output: 6