/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/array-examples/standard_init7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 01:24:55,774 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2019-11-07 01:24:55,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:24:55,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:24:55,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:24:55,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:24:55,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:24:55,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:24:55,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:24:55,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:24:55,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:24:55,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:24:55,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:24:55,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:24:55,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:24:55,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:24:55,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:24:55,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:24:55,852 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 01:24:55,875 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:24:55,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:24:55,878 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:24:55,878 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:24:55,878 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:24:55,879 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:24:55,879 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:24:55,879 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:24:55,880 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:24:55,880 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:24:55,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:24:55,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:24:55,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:24:55,882 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:24:55,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:24:55,883 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:24:55,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:24:55,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:24:55,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:24:55,883 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:24:55,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:24:55,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:24:55,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:24:55,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:24:55,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:24:55,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:24:55,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:24:55,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:24:55,886 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 01:24:56,219 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:24:56,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:24:56,239 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:24:56,240 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:24:56,241 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:24:56,241 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-11-07 01:24:56,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8df70fb/547da5fad18744358c8615d340587be0/FLAG49b8726e8 [2019-11-07 01:24:56,741 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:24:56,744 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init7_ground-2.i [2019-11-07 01:24:56,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8df70fb/547da5fad18744358c8615d340587be0/FLAG49b8726e8 [2019-11-07 01:24:57,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8df70fb/547da5fad18744358c8615d340587be0 [2019-11-07 01:24:57,168 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:24:57,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:24:57,180 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:57,180 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:24:57,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:24:57,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78e1d6a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57, skipping insertion in model container [2019-11-07 01:24:57,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,211 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:24:57,236 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:24:57,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:57,499 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:24:57,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:24:57,623 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:24:57,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57 WrapperNode [2019-11-07 01:24:57,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:24:57,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:24:57,625 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:24:57,625 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:24:57,637 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,645 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,667 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,669 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (1/1) ... [2019-11-07 01:24:57,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:24:57,671 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:24:57,671 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:24:57,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:24:57,673 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (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 01:24:57,729 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:24:57,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:24:57,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 01:24:57,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:24:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:24:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 01:24:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:24:57,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:24:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:24:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:24:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:24:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:24:57,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:24:58,164 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:24:58,164 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-07 01:24:58,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:58 BoogieIcfgContainer [2019-11-07 01:24:58,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:24:58,167 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:24:58,167 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:24:58,172 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:24:58,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:24:57" (1/3) ... [2019-11-07 01:24:58,173 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63741c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:58, skipping insertion in model container [2019-11-07 01:24:58,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:24:57" (2/3) ... [2019-11-07 01:24:58,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63741c93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:24:58, skipping insertion in model container [2019-11-07 01:24:58,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:24:58" (3/3) ... [2019-11-07 01:24:58,179 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init7_ground-2.i [2019-11-07 01:24:58,188 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:24:58,194 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:24:58,203 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:24:58,224 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:24:58,224 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:24:58,224 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:24:58,224 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:24:58,224 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:24:58,225 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:24:58,225 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:24:58,225 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:24:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-07 01:24:58,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-07 01:24:58,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:58,245 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:58,246 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:58,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:58,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1872680520, now seen corresponding path program 1 times [2019-11-07 01:24:58,262 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:58,263 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54081594] [2019-11-07 01:24:58,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:58,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:58,423 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 01:24:58,424 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54081594] [2019-11-07 01:24:58,425 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:24:58,425 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:24:58,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510934841] [2019-11-07 01:24:58,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:24:58,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:24:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:24:58,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:24:58,455 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-07 01:24:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:24:58,581 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2019-11-07 01:24:58,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:24:58,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-07 01:24:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:24:58,595 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:24:58,595 INFO L226 Difference]: Without dead ends: 28 [2019-11-07 01:24:58,602 INFO L630 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 [2019-11-07 01:24:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-07 01:24:58,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-07 01:24:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:24:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-07 01:24:58,665 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2019-11-07 01:24:58,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:24:58,666 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-07 01:24:58,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:24:58,667 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-07 01:24:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-07 01:24:58,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:24:58,670 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:24:58,671 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:24:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:24:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash 802380745, now seen corresponding path program 1 times [2019-11-07 01:24:58,672 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:24:58,673 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396588222] [2019-11-07 01:24:58,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:24:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:24:58,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396588222] [2019-11-07 01:24:58,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443565735] [2019-11-07 01:24:58,824 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 01:24:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:24:58,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:24:58,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:24:58,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:24:58,955 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:24:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-07 01:24:58,989 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [890251049] [2019-11-07 01:24:59,015 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:24:59,015 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:24:59,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:24:59,029 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:24:59,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:24:59,165 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:00,131 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:00,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:00,146 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:00,529 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:00,529 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 10] total 17 [2019-11-07 01:25:00,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354151364] [2019-11-07 01:25:00,543 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-07 01:25:00,543 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:00,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-07 01:25:00,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2019-11-07 01:25:00,545 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 17 states. [2019-11-07 01:25:01,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:01,426 INFO L93 Difference]: Finished difference Result 79 states and 113 transitions. [2019-11-07 01:25:01,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-07 01:25:01,427 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-07 01:25:01,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:01,430 INFO L225 Difference]: With dead ends: 79 [2019-11-07 01:25:01,431 INFO L226 Difference]: Without dead ends: 58 [2019-11-07 01:25:01,435 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2019-11-07 01:25:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-11-07 01:25:01,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2019-11-07 01:25:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-07 01:25:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2019-11-07 01:25:01,456 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 24 [2019-11-07 01:25:01,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:01,456 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2019-11-07 01:25:01,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-07 01:25:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2019-11-07 01:25:01,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 01:25:01,462 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:01,462 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:01,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:01,664 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:01,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:01,664 INFO L82 PathProgramCache]: Analyzing trace with hash -968414200, now seen corresponding path program 2 times [2019-11-07 01:25:01,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:01,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463360399] [2019-11-07 01:25:01,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:01,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:25:01,919 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463360399] [2019-11-07 01:25:01,920 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731499692] [2019-11-07 01:25:01,920 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 [2019-11-07 01:25:02,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 01:25:02,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:02,075 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 01:25:02,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:02,112 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:25:02,113 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:02,180 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-07 01:25:02,180 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043918456] [2019-11-07 01:25:02,183 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:25:02,187 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:02,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:02,188 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:02,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:02,222 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:02,851 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:02,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:02,866 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:03,403 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:03,403 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 10] total 23 [2019-11-07 01:25:03,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63781231] [2019-11-07 01:25:03,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-07 01:25:03,405 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:03,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-07 01:25:03,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2019-11-07 01:25:03,406 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand 23 states. [2019-11-07 01:25:04,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:04,588 INFO L93 Difference]: Finished difference Result 139 states and 194 transitions. [2019-11-07 01:25:04,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-07 01:25:04,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 45 [2019-11-07 01:25:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:04,590 INFO L225 Difference]: With dead ends: 139 [2019-11-07 01:25:04,591 INFO L226 Difference]: Without dead ends: 100 [2019-11-07 01:25:04,594 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=312, Invalid=1248, Unknown=0, NotChecked=0, Total=1560 [2019-11-07 01:25:04,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-07 01:25:04,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 91. [2019-11-07 01:25:04,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-07 01:25:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2019-11-07 01:25:04,628 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 45 [2019-11-07 01:25:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:04,629 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2019-11-07 01:25:04,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-07 01:25:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2019-11-07 01:25:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-07 01:25:04,634 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:04,634 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:04,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:04,839 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1028419416, now seen corresponding path program 3 times [2019-11-07 01:25:04,842 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:04,842 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373836417] [2019-11-07 01:25:04,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:05,210 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-07 01:25:05,212 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373836417] [2019-11-07 01:25:05,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709831503] [2019-11-07 01:25:05,216 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 [2019-11-07 01:25:05,321 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 01:25:05,321 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 01:25:05,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 01:25:05,336 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:05,372 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-07 01:25:05,373 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:05,596 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-07 01:25:05,596 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911757630] [2019-11-07 01:25:05,598 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:25:05,598 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:05,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:05,599 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:05,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:05,641 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:06,121 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:06,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:06,129 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:06,465 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:06,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 10] total 35 [2019-11-07 01:25:06,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929069136] [2019-11-07 01:25:06,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-07 01:25:06,468 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:06,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-07 01:25:06,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2019-11-07 01:25:06,469 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 35 states. [2019-11-07 01:25:08,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:08,927 INFO L93 Difference]: Finished difference Result 259 states and 356 transitions. [2019-11-07 01:25:08,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-07 01:25:08,928 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 87 [2019-11-07 01:25:08,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:08,931 INFO L225 Difference]: With dead ends: 259 [2019-11-07 01:25:08,931 INFO L226 Difference]: Without dead ends: 184 [2019-11-07 01:25:08,933 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=978, Invalid=3054, Unknown=0, NotChecked=0, Total=4032 [2019-11-07 01:25:08,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2019-11-07 01:25:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 175. [2019-11-07 01:25:08,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2019-11-07 01:25:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 182 transitions. [2019-11-07 01:25:08,960 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 182 transitions. Word has length 87 [2019-11-07 01:25:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:08,960 INFO L462 AbstractCegarLoop]: Abstraction has 175 states and 182 transitions. [2019-11-07 01:25:08,960 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-07 01:25:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 182 transitions. [2019-11-07 01:25:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2019-11-07 01:25:08,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:08,964 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:09,167 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:09,168 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:09,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:09,168 INFO L82 PathProgramCache]: Analyzing trace with hash 521847272, now seen corresponding path program 4 times [2019-11-07 01:25:09,170 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:09,175 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107394050] [2019-11-07 01:25:09,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-11-07 01:25:09,815 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107394050] [2019-11-07 01:25:09,816 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965375973] [2019-11-07 01:25:09,816 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 [2019-11-07 01:25:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:10,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 01:25:10,051 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:25:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-11-07 01:25:10,107 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:25:10,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2019-11-07 01:25:10,805 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [314415382] [2019-11-07 01:25:10,807 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2019-11-07 01:25:10,808 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 01:25:10,808 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 01:25:10,808 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 01:25:10,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 01:25:10,832 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 01:25:11,206 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 28 for LOIs [2019-11-07 01:25:11,213 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 01:25:11,215 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 01:25:11,629 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 01:25:11,629 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 10] total 59 [2019-11-07 01:25:11,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628630408] [2019-11-07 01:25:11,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-07 01:25:11,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 01:25:11,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-07 01:25:11,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1205, Invalid=2217, Unknown=0, NotChecked=0, Total=3422 [2019-11-07 01:25:11,634 INFO L87 Difference]: Start difference. First operand 175 states and 182 transitions. Second operand 59 states. [2019-11-07 01:25:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:25:16,817 INFO L93 Difference]: Finished difference Result 499 states and 680 transitions. [2019-11-07 01:25:16,817 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-11-07 01:25:16,818 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 171 [2019-11-07 01:25:16,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:25:16,821 INFO L225 Difference]: With dead ends: 499 [2019-11-07 01:25:16,821 INFO L226 Difference]: Without dead ends: 352 [2019-11-07 01:25:16,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2753 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3606, Invalid=8826, Unknown=0, NotChecked=0, Total=12432 [2019-11-07 01:25:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2019-11-07 01:25:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 343. [2019-11-07 01:25:16,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2019-11-07 01:25:16,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 350 transitions. [2019-11-07 01:25:16,866 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 350 transitions. Word has length 171 [2019-11-07 01:25:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:25:16,867 INFO L462 AbstractCegarLoop]: Abstraction has 343 states and 350 transitions. [2019-11-07 01:25:16,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-07 01:25:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 350 transitions. [2019-11-07 01:25:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2019-11-07 01:25:16,874 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:25:16,874 INFO L410 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 01:25:17,078 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:25:17,080 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:25:17,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:25:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash -769997720, now seen corresponding path program 5 times [2019-11-07 01:25:17,081 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 01:25:17,081 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996271386] [2019-11-07 01:25:17,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:25:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:25:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7567 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 6486 trivial. 0 not checked. [2019-11-07 01:25:18,707 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996271386] [2019-11-07 01:25:18,708 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677241857] [2019-11-07 01:25:18,708 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