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/loop-lit/gj2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 03:02:46,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 03:02:46,438 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 03:02:46,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 03:02:46,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 03:02:46,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 03:02:46,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 03:02:46,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 03:02:46,457 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 03:02:46,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 03:02:46,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 03:02:46,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 03:02:46,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 03:02:46,468 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 03:02:46,469 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 03:02:46,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 03:02:46,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 03:02:46,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 03:02:46,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 03:02:46,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 03:02:46,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 03:02:46,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 03:02:46,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 03:02:46,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 03:02:46,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 03:02:46,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 03:02:46,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 03:02:46,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 03:02:46,522 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 03:02:46,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 03:02:46,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 03:02:46,546 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 03:02:46,546 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 03:02:46,547 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 03:02:46,547 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 03:02:46,547 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 03:02:46,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 03:02:46,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 03:02:46,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 03:02:46,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 03:02:46,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 03:02:46,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 03:02:46,550 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 03:02:46,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 03:02:46,551 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 03:02:46,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 03:02:46,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 03:02:46,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 03:02:46,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 03:02:46,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 03:02:46,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 03:02:46,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 03:02:46,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 03:02:46,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 03:02:46,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 03:02:46,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 03:02:46,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 03:02:46,554 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 03:02:46,932 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 03:02:46,956 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 03:02:46,960 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 03:02:46,962 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 03:02:46,963 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 03:02:46,964 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.i [2019-10-15 03:02:47,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af11988b/c2c2dffd27224742a6f3cb109c7172a1/FLAG399384050 [2019-10-15 03:02:47,616 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 03:02:47,616 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.i [2019-10-15 03:02:47,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af11988b/c2c2dffd27224742a6f3cb109c7172a1/FLAG399384050 [2019-10-15 03:02:47,935 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5af11988b/c2c2dffd27224742a6f3cb109c7172a1 [2019-10-15 03:02:47,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 03:02:47,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 03:02:47,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:47,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 03:02:47,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 03:02:47,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:47" (1/1) ... [2019-10-15 03:02:47,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@100f17a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:47, skipping insertion in model container [2019-10-15 03:02:47,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:02:47" (1/1) ... [2019-10-15 03:02:47,968 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 03:02:47,992 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 03:02:48,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:48,183 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 03:02:48,205 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 03:02:48,224 INFO L192 MainTranslator]: Completed translation [2019-10-15 03:02:48,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48 WrapperNode [2019-10-15 03:02:48,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 03:02:48,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 03:02:48,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 03:02:48,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 03:02:48,354 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,355 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (1/1) ... [2019-10-15 03:02:48,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 03:02:48,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 03:02:48,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 03:02:48,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 03:02:48,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (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 03:02:48,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 03:02:48,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 03:02:48,436 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 03:02:48,436 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 03:02:48,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 03:02:48,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-15 03:02:48,436 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 03:02:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 03:02:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 03:02:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 03:02:48,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 03:02:48,656 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 03:02:48,659 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 03:02:48,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:48 BoogieIcfgContainer [2019-10-15 03:02:48,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 03:02:48,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 03:02:48,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 03:02:48,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 03:02:48,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:02:47" (1/3) ... [2019-10-15 03:02:48,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31146d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:48, skipping insertion in model container [2019-10-15 03:02:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:02:48" (2/3) ... [2019-10-15 03:02:48,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31146d2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:02:48, skipping insertion in model container [2019-10-15 03:02:48,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:02:48" (3/3) ... [2019-10-15 03:02:48,684 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.i [2019-10-15 03:02:48,695 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 03:02:48,706 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 03:02:48,719 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 03:02:48,752 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 03:02:48,752 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 03:02:48,753 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 03:02:48,753 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 03:02:48,754 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 03:02:48,754 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 03:02:48,754 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 03:02:48,754 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 03:02:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-10-15 03:02:48,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-10-15 03:02:48,781 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:48,782 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:48,784 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:48,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:48,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1733570904, now seen corresponding path program 1 times [2019-10-15 03:02:48,798 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:48,799 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696082703] [2019-10-15 03:02:48,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:48,799 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:48,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:48,941 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 03:02:48,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696082703] [2019-10-15 03:02:48,943 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 03:02:48,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 03:02:48,944 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893707042] [2019-10-15 03:02:48,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 03:02:48,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 03:02:48,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:02:48,969 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-10-15 03:02:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:49,019 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-10-15 03:02:49,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 03:02:49,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-10-15 03:02:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:49,048 INFO L225 Difference]: With dead ends: 29 [2019-10-15 03:02:49,048 INFO L226 Difference]: Without dead ends: 12 [2019-10-15 03:02:49,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 03:02:49,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-10-15 03:02:49,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-10-15 03:02:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-10-15 03:02:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-10-15 03:02:49,100 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-10-15 03:02:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:49,100 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-10-15 03:02:49,101 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 03:02:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-10-15 03:02:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-15 03:02:49,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:49,102 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:49,103 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:49,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:49,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2033404008, now seen corresponding path program 1 times [2019-10-15 03:02:49,104 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:49,104 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809238584] [2019-10-15 03:02:49,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:49,104 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:49,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:49,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:49,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:49,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809238584] [2019-10-15 03:02:49,187 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323496444] [2019-10-15 03:02:49,187 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 03:02:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:49,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 03:02:49,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:49,252 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:49,280 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:49,297 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 03:02:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:49,351 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131947471] [2019-10-15 03:02:49,376 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:02:49,377 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:49,384 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:49,396 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:49,397 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:49,460 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:49,779 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:49,836 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:49,840 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:50,054 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:50,054 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 6] total 11 [2019-10-15 03:02:50,055 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666394813] [2019-10-15 03:02:50,057 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 03:02:50,058 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:50,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 03:02:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-15 03:02:50,059 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2019-10-15 03:02:50,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:50,206 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-10-15 03:02:50,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 03:02:50,208 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2019-10-15 03:02:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:50,209 INFO L225 Difference]: With dead ends: 20 [2019-10-15 03:02:50,209 INFO L226 Difference]: Without dead ends: 15 [2019-10-15 03:02:50,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-15 03:02:50,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-15 03:02:50,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-15 03:02:50,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-15 03:02:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-15 03:02:50,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-10-15 03:02:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:50,225 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-15 03:02:50,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-15 03:02:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-15 03:02:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-15 03:02:50,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:50,226 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:50,432 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:50,432 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:50,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1000095400, now seen corresponding path program 2 times [2019-10-15 03:02:50,433 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:50,434 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6701539] [2019-10-15 03:02:50,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,434 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:50,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:50,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6701539] [2019-10-15 03:02:50,624 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705630741] [2019-10-15 03:02:50,624 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:02:50,675 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-15 03:02:50,675 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:50,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 03:02:50,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:50,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:50,749 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:50,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111359746] [2019-10-15 03:02:50,911 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:02:50,912 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:50,912 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:50,912 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:50,913 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:50,929 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:51,023 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:51,043 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:51,046 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:51,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:51,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 6] total 17 [2019-10-15 03:02:51,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384780408] [2019-10-15 03:02:51,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-15 03:02:51,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-15 03:02:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2019-10-15 03:02:51,315 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 17 states. [2019-10-15 03:02:51,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:51,618 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-10-15 03:02:51,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-15 03:02:51,618 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2019-10-15 03:02:51,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:51,619 INFO L225 Difference]: With dead ends: 26 [2019-10-15 03:02:51,619 INFO L226 Difference]: Without dead ends: 21 [2019-10-15 03:02:51,620 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2019-10-15 03:02:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-15 03:02:51,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-15 03:02:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-15 03:02:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-15 03:02:51,627 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-10-15 03:02:51,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:51,627 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-15 03:02:51,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-15 03:02:51,627 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-15 03:02:51,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-15 03:02:51,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:51,628 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:51,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:51,836 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:51,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:51,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1156847960, now seen corresponding path program 3 times [2019-10-15 03:02:51,836 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:51,837 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270149706] [2019-10-15 03:02:51,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:51,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:51,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:51,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:52,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270149706] [2019-10-15 03:02:52,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091407127] [2019-10-15 03:02:52,040 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:52,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:02:52,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:02:52,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-15 03:02:52,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:52,296 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:52,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:52,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [730964148] [2019-10-15 03:02:52,896 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:02:52,896 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:52,897 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:52,897 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:52,898 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:52,912 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:52,986 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:53,007 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:53,010 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:53,208 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:53,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 6] total 29 [2019-10-15 03:02:53,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434180214] [2019-10-15 03:02:53,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-15 03:02:53,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:53,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-15 03:02:53,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2019-10-15 03:02:53,212 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 29 states. [2019-10-15 03:02:54,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:54,107 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-10-15 03:02:54,107 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-15 03:02:54,107 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 20 [2019-10-15 03:02:54,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:54,109 INFO L225 Difference]: With dead ends: 38 [2019-10-15 03:02:54,109 INFO L226 Difference]: Without dead ends: 33 [2019-10-15 03:02:54,111 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=840, Invalid=1710, Unknown=0, NotChecked=0, Total=2550 [2019-10-15 03:02:54,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-15 03:02:54,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-15 03:02:54,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 03:02:54,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-15 03:02:54,127 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2019-10-15 03:02:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:54,128 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-15 03:02:54,129 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-15 03:02:54,129 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-15 03:02:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 03:02:54,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:54,135 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:54,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:54,339 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:54,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:54,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1890503000, now seen corresponding path program 4 times [2019-10-15 03:02:54,340 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:54,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748754167] [2019-10-15 03:02:54,340 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:54,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:54,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:02:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:54,910 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748754167] [2019-10-15 03:02:54,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192809257] [2019-10-15 03:02:54,911 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:02:54,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-15 03:02:54,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:02:55,599 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:55,599 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:02:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:02:56,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1162111504] [2019-10-15 03:02:56,917 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:02:56,918 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:02:56,918 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:02:56,918 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:02:56,918 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:02:56,931 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:02:57,005 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:02:57,021 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:02:57,023 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:02:57,205 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:02:57,206 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 6] total 53 [2019-10-15 03:02:57,206 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234675893] [2019-10-15 03:02:57,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-10-15 03:02:57,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:02:57,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-10-15 03:02:57,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1142, Invalid=1614, Unknown=0, NotChecked=0, Total=2756 [2019-10-15 03:02:57,211 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 53 states. [2019-10-15 03:02:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:02:59,664 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2019-10-15 03:02:59,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-10-15 03:02:59,665 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 32 [2019-10-15 03:02:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:02:59,666 INFO L225 Difference]: With dead ends: 62 [2019-10-15 03:02:59,667 INFO L226 Difference]: Without dead ends: 57 [2019-10-15 03:02:59,670 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 47 SyntacticMatches, 22 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3396, Invalid=6306, Unknown=0, NotChecked=0, Total=9702 [2019-10-15 03:02:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-15 03:02:59,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-10-15 03:02:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-15 03:02:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-10-15 03:02:59,681 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2019-10-15 03:02:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:02:59,682 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-10-15 03:02:59,682 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-10-15 03:02:59,682 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-10-15 03:02:59,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-15 03:02:59,684 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:02:59,685 INFO L380 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:02:59,888 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:02:59,888 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:02:59,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:02:59,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1015818584, now seen corresponding path program 5 times [2019-10-15 03:02:59,889 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:02:59,890 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607442277] [2019-10-15 03:02:59,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:59,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:02:59,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:01,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607442277] [2019-10-15 03:03:01,360 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809328710] [2019-10-15 03:03:01,360 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:01,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2019-10-15 03:03:01,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:01,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 48 conjunts are in the unsatisfiable core [2019-10-15 03:03:01,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:03,117 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 03:03:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:07,640 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411268576] [2019-10-15 03:03:07,641 INFO L162 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-10-15 03:03:07,641 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 03:03:07,641 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 03:03:07,642 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 03:03:07,642 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 03:03:07,650 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 1 for LOIs [2019-10-15 03:03:07,706 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 6 for LOIs [2019-10-15 03:03:07,728 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 1 for LOIs [2019-10-15 03:03:07,731 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 03:03:08,203 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-15 03:03:08,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49, 6] total 101 [2019-10-15 03:03:08,204 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897523997] [2019-10-15 03:03:08,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-10-15 03:03:08,206 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 03:03:08,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-10-15 03:03:08,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4574, Invalid=5526, Unknown=0, NotChecked=0, Total=10100 [2019-10-15 03:03:08,211 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 101 states. [2019-10-15 03:03:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 03:03:14,082 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2019-10-15 03:03:14,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-10-15 03:03:14,082 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 56 [2019-10-15 03:03:14,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 03:03:14,085 INFO L225 Difference]: With dead ends: 110 [2019-10-15 03:03:14,085 INFO L226 Difference]: Without dead ends: 105 [2019-10-15 03:03:14,094 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 71 SyntacticMatches, 46 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7232 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=13692, Invalid=24138, Unknown=0, NotChecked=0, Total=37830 [2019-10-15 03:03:14,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2019-10-15 03:03:14,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2019-10-15 03:03:14,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-15 03:03:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2019-10-15 03:03:14,107 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2019-10-15 03:03:14,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 03:03:14,108 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2019-10-15 03:03:14,108 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-10-15 03:03:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2019-10-15 03:03:14,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-15 03:03:14,110 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 03:03:14,110 INFO L380 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 03:03:14,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:14,311 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 03:03:14,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 03:03:14,312 INFO L82 PathProgramCache]: Analyzing trace with hash -169416360, now seen corresponding path program 6 times [2019-10-15 03:03:14,312 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 03:03:14,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22958278] [2019-10-15 03:03:14,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:14,313 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 03:03:14,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 03:03:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 03:03:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:21,113 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22958278] [2019-10-15 03:03:21,114 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77645225] [2019-10-15 03:03:21,114 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 03:03:21,234 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-15 03:03:21,234 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 03:03:21,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 97 conjunts are in the unsatisfiable core [2019-10-15 03:03:21,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 03:03:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 03:03:27,341 INFO L321 TraceCheckSpWp]: Computing backward predicates...