/usr/bin/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-fb55353 [2019-11-07 04:05:10,234 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 04:05:10,237 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 04:05:10,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 04:05:10,256 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 04:05:10,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 04:05:10,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 04:05:10,272 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 04:05:10,275 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 04:05:10,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 04:05:10,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 04:05:10,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 04:05:10,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 04:05:10,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 04:05:10,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 04:05:10,288 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 04:05:10,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 04:05:10,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 04:05:10,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 04:05:10,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 04:05:10,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 04:05:10,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 04:05:10,306 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 04:05:10,307 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 04:05:10,309 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 04:05:10,321 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 04:05:10,325 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 04:05:10,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 04:05:10,327 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 [2019-11-07 04:05:10,346 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 04:05:10,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 04:05:10,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 04:05:10,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 04:05:10,349 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 04:05:10,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 04:05:10,349 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 04:05:10,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 04:05:10,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 04:05:10,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 04:05:10,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 04:05:10,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 04:05:10,352 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 04:05:10,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 04:05:10,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 04:05:10,352 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 04:05:10,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 04:05:10,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 04:05:10,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 04:05:10,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 04:05:10,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 04:05:10,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 04:05:10,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 04:05:10,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 04:05:10,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 04:05:10,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 04:05:10,355 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 04:05:10,355 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 04:05:10,355 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 [2019-11-07 04:05:10,616 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 04:05:10,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 04:05:10,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 04:05:10,634 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 04:05:10,635 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 04:05:10,635 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps4.c [2019-11-07 04:05:10,696 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e09c905/7c34c8772eef4cdf83afe0d8299d4d67/FLAGcbf538aba [2019-11-07 04:05:11,138 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 04:05:11,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps4.c [2019-11-07 04:05:11,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e09c905/7c34c8772eef4cdf83afe0d8299d4d67/FLAGcbf538aba [2019-11-07 04:05:11,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8e09c905/7c34c8772eef4cdf83afe0d8299d4d67 [2019-11-07 04:05:11,584 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 04:05:11,585 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 04:05:11,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 04:05:11,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 04:05:11,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 04:05:11,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:11,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40d1ab0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11, skipping insertion in model container [2019-11-07 04:05:11,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:11,625 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 04:05:11,653 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 04:05:11,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:05:11,881 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 04:05:11,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 04:05:11,916 INFO L192 MainTranslator]: Completed translation [2019-11-07 04:05:11,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11 WrapperNode [2019-11-07 04:05:11,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 04:05:11,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 04:05:11,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 04:05:11,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 04:05:12,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (1/1) ... [2019-11-07 04:05:12,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 04:05:12,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 04:05:12,028 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 04:05:12,028 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 04:05:12,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (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 [2019-11-07 04:05:12,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 04:05:12,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 04:05:12,093 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 04:05:12,093 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 04:05:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 04:05:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 04:05:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-11-07 04:05:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 04:05:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 04:05:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 04:05:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 04:05:12,281 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 04:05:12,282 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 04:05:12,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:05:12 BoogieIcfgContainer [2019-11-07 04:05:12,283 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 04:05:12,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 04:05:12,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 04:05:12,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 04:05:12,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 04:05:11" (1/3) ... [2019-11-07 04:05:12,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eadb8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:05:12, skipping insertion in model container [2019-11-07 04:05:12,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 04:05:11" (2/3) ... [2019-11-07 04:05:12,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7eadb8e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 04:05:12, skipping insertion in model container [2019-11-07 04:05:12,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 04:05:12" (3/3) ... [2019-11-07 04:05:12,291 INFO L109 eAbstractionObserver]: Analyzing ICFG ps4.c [2019-11-07 04:05:12,301 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 04:05:12,309 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 04:05:12,325 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 04:05:12,371 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 04:05:12,371 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 04:05:12,371 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 04:05:12,380 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 04:05:12,380 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 04:05:12,381 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 04:05:12,381 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 04:05:12,381 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 04:05:12,414 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-11-07 04:05:12,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 04:05:12,422 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:05:12,423 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:05:12,425 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:05:12,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:05:12,434 INFO L82 PathProgramCache]: Analyzing trace with hash -122887910, now seen corresponding path program 1 times [2019-11-07 04:05:12,446 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:05:12,447 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933042577] [2019-11-07 04:05:12,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:05:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:05:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:05:12,546 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933042577] [2019-11-07 04:05:12,547 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:05:12,547 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 04:05:12,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371323542] [2019-11-07 04:05:12,554 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 04:05:12,554 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:05:12,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 04:05:12,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 04:05:12,572 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2019-11-07 04:05:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:05:12,597 INFO L93 Difference]: Finished difference Result 35 states and 46 transitions. [2019-11-07 04:05:12,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 04:05:12,599 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-11-07 04:05:12,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:05:12,609 INFO L225 Difference]: With dead ends: 35 [2019-11-07 04:05:12,610 INFO L226 Difference]: Without dead ends: 16 [2019-11-07 04:05:12,613 INFO L630 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 [2019-11-07 04:05:12,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-11-07 04:05:12,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-11-07 04:05:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-07 04:05:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-07 04:05:12,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-11-07 04:05:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:05:12,658 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-07 04:05:12,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 04:05:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-07 04:05:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 04:05:12,660 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:05:12,660 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:05:12,661 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:05:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:05:12,661 INFO L82 PathProgramCache]: Analyzing trace with hash -156194248, now seen corresponding path program 1 times [2019-11-07 04:05:12,662 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:05:12,662 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811125601] [2019-11-07 04:05:12,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:05:12,670 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 04:05:12,670 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105506564] [2019-11-07 04:05:12,670 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 [2019-11-07 04:05:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:05:12,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-07 04:05:12,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:05:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:05:12,842 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:05:13,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 04:05:13,019 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811125601] [2019-11-07 04:05:13,020 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 04:05:13,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105506564] [2019-11-07 04:05:13,020 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-07 04:05:13,021 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-07 04:05:13,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030317965] [2019-11-07 04:05:13,023 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-07 04:05:13,024 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:05:13,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-07 04:05:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-07 04:05:13,025 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 8 states. [2019-11-07 04:05:13,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 04:05:13,189 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-11-07 04:05:13,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-07 04:05:13,190 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2019-11-07 04:05:13,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 04:05:13,191 INFO L225 Difference]: With dead ends: 27 [2019-11-07 04:05:13,191 INFO L226 Difference]: Without dead ends: 20 [2019-11-07 04:05:13,193 INFO L630 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 [2019-11-07 04:05:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-07 04:05:13,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-07 04:05:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-07 04:05:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-07 04:05:13,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2019-11-07 04:05:13,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 04:05:13,201 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-07 04:05:13,201 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-07 04:05:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-07 04:05:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-07 04:05:13,202 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 04:05:13,202 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 04:05:13,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 04:05:13,404 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 04:05:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 04:05:13,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1323071607, now seen corresponding path program 1 times [2019-11-07 04:05:13,405 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 04:05:13,405 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58511961] [2019-11-07 04:05:13,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 04:05:13,422 ERROR L268 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-07 04:05:13,422 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506704756] [2019-11-07 04:05:13,422 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 [2019-11-07 04:05:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 04:05:13,508 WARN L254 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-07 04:05:13,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 04:05:13,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-07 04:05:13,671 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 04:05:13,776 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:14,002 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:16,149 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 [2019-11-07 04:05:16,308 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:18,329 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 [2019-11-07 04:05:18,519 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-07 04:05:18,520 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:18,532 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-07 04:05:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2019-11-07 04:05:18,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58511961] [2019-11-07 04:05:18,556 INFO L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-07 04:05:18,557 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506704756] [2019-11-07 04:05:18,557 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134135719] [2019-11-07 04:05:18,592 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-07 04:05:18,592 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 04:05:18,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 04:05:18,606 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 04:05:18,606 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 04:05:18,653 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-11-07 04:05:23,143 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-11-07 04:05:23,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-11-07 04:05:23,148 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 04:05:24,926 WARN L191 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2019-11-07 04:05:43,879 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-07 04:05:43,880 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 23 [2019-11-07 04:05:43,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088955957] [2019-11-07 04:05:43,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 04:05:43,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 04:05:43,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 04:05:43,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=345, Unknown=10, NotChecked=78, Total=506 [2019-11-07 04:05:43,883 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 23 states. [2019-11-07 04:05:59,236 WARN L191 SmtUtils]: Spent 10.54 s on a formula simplification. DAG size of input: 50 DAG size of output: 34