/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/loop-acceleration/array_2-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-07 03:58:34,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 03:58:34,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 03:58:34,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-07 03:58:34,592 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 03:58:34,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 03:58:34,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 03:58:34,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 03:58:34,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 03:58:34,604 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 03:58:34,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 03:58:34,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 03:58:34,615 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 03:58:34,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 03:58:34,620 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 03:58:34,621 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 03:58:34,623 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 03:58:34,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 03:58:34,631 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 03:58:34,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 03:58:34,632 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 03:58:34,646 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 03:58:34,647 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 03:58:34,648 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 03:58:34,648 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 03:58:34,648 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 03:58:34,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 03:58:34,649 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 03:58:34,649 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 03:58:34,649 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 03:58:34,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 03:58:34,650 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 03:58:34,650 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 03:58:34,650 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 03:58:34,650 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 03:58:34,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 03:58:34,651 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 03:58:34,651 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 03:58:34,651 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 03:58:34,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 03:58:34,652 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 03:58:34,652 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 03:58:34,652 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 03:58:34,652 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 03:58:34,652 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 03:58:34,653 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 03:58:34,653 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 03:58:34,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 03:58:34,653 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 03:58:34,653 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 03:58:35,002 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 03:58:35,023 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 03:58:35,026 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 03:58:35,029 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 03:58:35,030 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 03:58:35,031 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1.i [2019-11-07 03:58:35,102 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5159fdf7c/8e3a4a0598674e4ba00973d8bbc087e2/FLAG318333f5e [2019-11-07 03:58:35,534 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 03:58:35,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1.i [2019-11-07 03:58:35,542 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5159fdf7c/8e3a4a0598674e4ba00973d8bbc087e2/FLAG318333f5e [2019-11-07 03:58:35,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5159fdf7c/8e3a4a0598674e4ba00973d8bbc087e2 [2019-11-07 03:58:35,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 03:58:35,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 03:58:35,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:35,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 03:58:35,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 03:58:35,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:35" (1/1) ... [2019-11-07 03:58:35,974 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f1f1580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:35, skipping insertion in model container [2019-11-07 03:58:35,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:58:35" (1/1) ... [2019-11-07 03:58:35,982 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 03:58:36,002 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 03:58:36,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:36,216 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 03:58:36,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 03:58:36,267 INFO L192 MainTranslator]: Completed translation [2019-11-07 03:58:36,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36 WrapperNode [2019-11-07 03:58:36,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 03:58:36,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 03:58:36,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 03:58:36,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 03:58:36,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,422 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,447 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (1/1) ... [2019-11-07 03:58:36,450 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 03:58:36,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 03:58:36,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 03:58:36,451 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 03:58:36,451 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (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 03:58:36,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 03:58:36,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 03:58:36,506 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-07 03:58:36,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 03:58:36,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 03:58:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 03:58:36,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 03:58:36,810 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 03:58:36,810 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-07 03:58:36,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:36 BoogieIcfgContainer [2019-11-07 03:58:36,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 03:58:36,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 03:58:36,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 03:58:36,825 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 03:58:36,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:58:35" (1/3) ... [2019-11-07 03:58:36,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb8a3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:36, skipping insertion in model container [2019-11-07 03:58:36,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:58:36" (2/3) ... [2019-11-07 03:58:36,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb8a3b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:58:36, skipping insertion in model container [2019-11-07 03:58:36,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:58:36" (3/3) ... [2019-11-07 03:58:36,846 INFO L109 eAbstractionObserver]: Analyzing ICFG array_2-1.i [2019-11-07 03:58:36,859 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 03:58:36,870 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 03:58:36,883 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 03:58:36,909 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 03:58:36,909 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 03:58:36,909 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 03:58:36,909 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 03:58:36,909 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 03:58:36,910 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 03:58:36,910 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 03:58:36,910 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 03:58:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-11-07 03:58:36,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-07 03:58:36,934 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:36,936 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:36,938 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:36,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:36,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1959451811, now seen corresponding path program 1 times [2019-11-07 03:58:36,951 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:36,952 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013668239] [2019-11-07 03:58:36,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:37,114 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 03:58:37,115 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013668239] [2019-11-07 03:58:37,116 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 03:58:37,116 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 03:58:37,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404588246] [2019-11-07 03:58:37,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 03:58:37,122 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:37,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 03:58:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 03:58:37,138 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-11-07 03:58:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:37,176 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2019-11-07 03:58:37,177 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 03:58:37,178 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-07 03:58:37,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:37,187 INFO L225 Difference]: With dead ends: 29 [2019-11-07 03:58:37,187 INFO L226 Difference]: Without dead ends: 12 [2019-11-07 03:58:37,191 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 03:58:37,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-07 03:58:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-07 03:58:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-07 03:58:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-07 03:58:37,226 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-11-07 03:58:37,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:37,227 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-07 03:58:37,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 03:58:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-07 03:58:37,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-07 03:58:37,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:37,228 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:37,229 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 504932467, now seen corresponding path program 1 times [2019-11-07 03:58:37,229 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:37,230 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186878292] [2019-11-07 03:58:37,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:37,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186878292] [2019-11-07 03:58:37,302 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903532878] [2019-11-07 03:58:37,302 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 03:58:37,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:37,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 03:58:37,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:37,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:37,447 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1453410723] [2019-11-07 03:58:37,470 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:37,471 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:37,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:37,485 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:37,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:37,647 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:37,924 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:37,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:37,943 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:38,356 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:38,357 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 9] total 16 [2019-11-07 03:58:38,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45688572] [2019-11-07 03:58:38,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-07 03:58:38,360 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:38,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-07 03:58:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-07 03:58:38,362 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 16 states. [2019-11-07 03:58:39,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:39,301 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2019-11-07 03:58:39,302 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-07 03:58:39,302 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 11 [2019-11-07 03:58:39,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:39,303 INFO L225 Difference]: With dead ends: 20 [2019-11-07 03:58:39,303 INFO L226 Difference]: Without dead ends: 15 [2019-11-07 03:58:39,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2019-11-07 03:58:39,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-07 03:58:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-07 03:58:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-07 03:58:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-07 03:58:39,315 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2019-11-07 03:58:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:39,315 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-07 03:58:39,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-07 03:58:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-07 03:58:39,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-07 03:58:39,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:39,319 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:39,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:39,526 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:39,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:39,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1070026915, now seen corresponding path program 2 times [2019-11-07 03:58:39,527 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:39,527 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529734649] [2019-11-07 03:58:39,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529734649] [2019-11-07 03:58:39,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14940073] [2019-11-07 03:58:39,665 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 03:58:39,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-07 03:58:39,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:58:39,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-07 03:58:39,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:39,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,726 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:39,796 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110264368] [2019-11-07 03:58:39,797 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:39,797 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:39,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:39,798 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:39,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:39,842 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:40,014 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:40,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:40,024 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:40,310 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:40,310 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 9] total 22 [2019-11-07 03:58:40,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306147490] [2019-11-07 03:58:40,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-07 03:58:40,312 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:40,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-07 03:58:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2019-11-07 03:58:40,313 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 22 states. [2019-11-07 03:58:41,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:41,341 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2019-11-07 03:58:41,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-07 03:58:41,347 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2019-11-07 03:58:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:41,348 INFO L225 Difference]: With dead ends: 26 [2019-11-07 03:58:41,348 INFO L226 Difference]: Without dead ends: 21 [2019-11-07 03:58:41,349 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=300, Invalid=1106, Unknown=0, NotChecked=0, Total=1406 [2019-11-07 03:58:41,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-07 03:58:41,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-07 03:58:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-07 03:58:41,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-07 03:58:41,361 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2019-11-07 03:58:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:41,362 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-07 03:58:41,362 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-07 03:58:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-07 03:58:41,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-07 03:58:41,363 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:41,363 INFO L410 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:41,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:41,569 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:41,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:41,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1928773981, now seen corresponding path program 3 times [2019-11-07 03:58:41,570 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:41,571 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663755994] [2019-11-07 03:58:41,571 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:41,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:41,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663755994] [2019-11-07 03:58:41,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275104039] [2019-11-07 03:58:41,734 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 03:58:41,790 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-07 03:58:41,791 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-07 03:58:41,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-07 03:58:41,793 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:41,806 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:41,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016227051] [2019-11-07 03:58:42,001 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:42,001 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:42,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:42,002 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:42,002 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:42,025 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:42,129 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:42,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:42,141 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:42,473 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:42,473 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 9] total 34 [2019-11-07 03:58:42,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801223524] [2019-11-07 03:58:42,475 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-07 03:58:42,475 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:42,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-07 03:58:42,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=797, Unknown=0, NotChecked=0, Total=1122 [2019-11-07 03:58:42,477 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 34 states. [2019-11-07 03:58:44,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:44,487 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2019-11-07 03:58:44,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-07 03:58:44,488 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 20 [2019-11-07 03:58:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:44,489 INFO L225 Difference]: With dead ends: 38 [2019-11-07 03:58:44,489 INFO L226 Difference]: Without dead ends: 33 [2019-11-07 03:58:44,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=966, Invalid=2816, Unknown=0, NotChecked=0, Total=3782 [2019-11-07 03:58:44,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-07 03:58:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-07 03:58:44,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-07 03:58:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-07 03:58:44,500 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2019-11-07 03:58:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:44,500 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-07 03:58:44,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-07 03:58:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-07 03:58:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 03:58:44,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:44,501 INFO L410 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:44,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:44,707 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:44,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1953340067, now seen corresponding path program 4 times [2019-11-07 03:58:44,710 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:44,713 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818966867] [2019-11-07 03:58:44,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:44,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:45,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818966867] [2019-11-07 03:58:45,162 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527531997] [2019-11-07 03:58:45,162 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 03:58:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:45,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-07 03:58:45,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 03:58:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:45,274 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 03:58:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:46,098 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [507975059] [2019-11-07 03:58:46,099 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2019-11-07 03:58:46,100 INFO L166 IcfgInterpreter]: Building call graph [2019-11-07 03:58:46,100 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-07 03:58:46,100 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-07 03:58:46,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-07 03:58:46,124 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-11-07 03:58:46,210 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 34 for LOIs [2019-11-07 03:58:46,216 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-11-07 03:58:46,218 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-07 03:58:46,724 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-11-07 03:58:46,725 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25, 9] total 58 [2019-11-07 03:58:46,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663779636] [2019-11-07 03:58:46,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-11-07 03:58:46,726 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-07 03:58:46,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-11-07 03:58:46,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1201, Invalid=2105, Unknown=0, NotChecked=0, Total=3306 [2019-11-07 03:58:46,729 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 58 states. [2019-11-07 03:58:49,024 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2019-11-07 03:58:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 03:58:51,631 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2019-11-07 03:58:51,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-07 03:58:51,633 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 32 [2019-11-07 03:58:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 03:58:51,635 INFO L225 Difference]: With dead ends: 62 [2019-11-07 03:58:51,635 INFO L226 Difference]: Without dead ends: 57 [2019-11-07 03:58:51,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2554 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3594, Invalid=8396, Unknown=0, NotChecked=0, Total=11990 [2019-11-07 03:58:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-07 03:58:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-07 03:58:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-07 03:58:51,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-07 03:58:51,663 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2019-11-07 03:58:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 03:58:51,664 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-07 03:58:51,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-11-07 03:58:51,664 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-07 03:58:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-07 03:58:51,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 03:58:51,670 INFO L410 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-07 03:58:51,873 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 03:58:51,873 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 03:58:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 03:58:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash -751283549, now seen corresponding path program 5 times [2019-11-07 03:58:51,875 INFO L161 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-07 03:58:51,877 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181404333] [2019-11-07 03:58:51,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 03:58:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 03:58:52,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-07 03:58:52,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181404333] [2019-11-07 03:58:52,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423409580] [2019-11-07 03:58:52,999 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