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 -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:52:15,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:52:15,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:52:16,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:52:16,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:52:16,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:52:16,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:52:16,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:52:16,019 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:52:16,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:52:16,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:52:16,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:52:16,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:52:16,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:52:16,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:52:16,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:52:16,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:52:16,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:52:16,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:52:16,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:52:16,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:52:16,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:52:16,050 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:52:16,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:52:16,055 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:52:16,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:52:16,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:52:16,070 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:52:16,071 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 [2019-09-03 19:52:16,089 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:52:16,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:52:16,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:52:16,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:52:16,091 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:52:16,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:52:16,092 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:52:16,092 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:52:16,092 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:52:16,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:52:16,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:52:16,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:52:16,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:52:16,093 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:52:16,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:52:16,093 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:52:16,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:52:16,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:52:16,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:52:16,094 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:52:16,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:52:16,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:52:16,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:52:16,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:52:16,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:52:16,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:52:16,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:52:16,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:52:16,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:52:16,124 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:52:16,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:52:16,139 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:52:16,141 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:52:16,141 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:52:16,142 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-09-03 19:52:16,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad579543/859f84f5f02f4e108d5d9acb51d67427/FLAG45232adf5 [2019-09-03 19:52:16,614 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:52:16,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-09-03 19:52:16,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad579543/859f84f5f02f4e108d5d9acb51d67427/FLAG45232adf5 [2019-09-03 19:52:17,032 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4ad579543/859f84f5f02f4e108d5d9acb51d67427 [2019-09-03 19:52:17,045 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:52:17,047 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:52:17,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:52:17,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:52:17,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:52:17,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@159201a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17, skipping insertion in model container [2019-09-03 19:52:17,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,066 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:52:17,087 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:52:17,260 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:52:17,264 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:52:17,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:52:17,296 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:52:17,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17 WrapperNode [2019-09-03 19:52:17,297 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:52:17,297 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:52:17,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:52:17,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:52:17,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,402 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (1/1) ... [2019-09-03 19:52:17,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:52:17,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:52:17,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:52:17,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:52:17,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (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 [2019-09-03 19:52:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:52:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:52:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:52:17,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:52:17,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:52:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 19:52:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:52:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:52:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:52:17,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:52:17,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:52:17,675 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:52:17,675 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:52:17,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:52:17 BoogieIcfgContainer [2019-09-03 19:52:17,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:52:17,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:52:17,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:52:17,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:52:17,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:52:17" (1/3) ... [2019-09-03 19:52:17,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580a07a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:52:17, skipping insertion in model container [2019-09-03 19:52:17,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:52:17" (2/3) ... [2019-09-03 19:52:17,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580a07a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:52:17, skipping insertion in model container [2019-09-03 19:52:17,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:52:17" (3/3) ... [2019-09-03 19:52:17,685 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-09-03 19:52:17,694 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:52:17,702 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:52:17,719 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:52:17,743 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:52:17,744 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:52:17,744 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:52:17,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:52:17,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:52:17,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:52:17,745 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:52:17,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:52:17,745 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:52:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-03 19:52:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-03 19:52:17,765 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:17,766 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:17,768 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:17,773 INFO L82 PathProgramCache]: Analyzing trace with hash -382823925, now seen corresponding path program 1 times [2019-09-03 19:52:17,774 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:17,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:17,816 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:17,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:17,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:17,884 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:52:17,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:52:17,889 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:52:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:52:17,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:52:17,906 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-03 19:52:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:17,926 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2019-09-03 19:52:17,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:52:17,927 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2019-09-03 19:52:17,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:17,936 INFO L225 Difference]: With dead ends: 35 [2019-09-03 19:52:17,937 INFO L226 Difference]: Without dead ends: 15 [2019-09-03 19:52:17,940 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:52:17,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-03 19:52:17,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-03 19:52:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-03 19:52:17,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-09-03 19:52:17,974 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2019-09-03 19:52:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:17,974 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-09-03 19:52:17,975 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:52:17,975 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2019-09-03 19:52:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 19:52:17,976 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:17,976 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:17,976 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1944032635, now seen corresponding path program 1 times [2019-09-03 19:52:17,977 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:17,977 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:17,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:17,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:17,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:18,291 WARN L188 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 5 [2019-09-03 19:52:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:18,325 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:52:18,326 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 19:52:18,327 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 19:52:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 19:52:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 19:52:18,329 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2019-09-03 19:52:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:18,375 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-03 19:52:18,375 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 19:52:18,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-03 19:52:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:18,377 INFO L225 Difference]: With dead ends: 23 [2019-09-03 19:52:18,377 INFO L226 Difference]: Without dead ends: 17 [2019-09-03 19:52:18,378 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:52:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-03 19:52:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-03 19:52:18,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 19:52:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-09-03 19:52:18,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2019-09-03 19:52:18,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:18,384 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-09-03 19:52:18,384 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 19:52:18,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-09-03 19:52:18,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 19:52:18,385 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:18,385 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:18,386 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:18,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:18,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1646139566, now seen corresponding path program 1 times [2019-09-03 19:52:18,387 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:18,387 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:18,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:18,388 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:18,388 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:18,673 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:52:18,673 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:52:18,691 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:18,711 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 19:52:18,717 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:52:18,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:18,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:52:18,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-09-03 19:52:18,839 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 19:52:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 19:52:18,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-09-03 19:52:18,840 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 12 states. [2019-09-03 19:52:18,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:18,957 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2019-09-03 19:52:18,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:52:18,959 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2019-09-03 19:52:18,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:18,961 INFO L225 Difference]: With dead ends: 28 [2019-09-03 19:52:18,961 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 19:52:18,962 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:52:18,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 19:52:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-09-03 19:52:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 19:52:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2019-09-03 19:52:18,971 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 16 [2019-09-03 19:52:18,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:18,972 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2019-09-03 19:52:18,972 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 19:52:18,972 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2019-09-03 19:52:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 19:52:18,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:18,974 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:18,974 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:18,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash -945074988, now seen corresponding path program 1 times [2019-09-03 19:52:18,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:18,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:18,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:18,978 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:18,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 19:52:19,031 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:52:19,031 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:52:19,032 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:52:19,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:52:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:52:19,033 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2019-09-03 19:52:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:19,044 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-09-03 19:52:19,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:52:19,045 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-09-03 19:52:19,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:19,046 INFO L225 Difference]: With dead ends: 31 [2019-09-03 19:52:19,046 INFO L226 Difference]: Without dead ends: 20 [2019-09-03 19:52:19,047 INFO L628 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 [2019-09-03 19:52:19,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-09-03 19:52:19,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-09-03 19:52:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 19:52:19,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-09-03 19:52:19,056 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2019-09-03 19:52:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:19,057 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-09-03 19:52:19,057 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:52:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-09-03 19:52:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 19:52:19,059 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:19,059 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:19,060 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:19,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:19,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1104392731, now seen corresponding path program 2 times [2019-09-03 19:52:19,061 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:19,061 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:19,065 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:19,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:19,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:52:19,377 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:52:19,395 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:52:19,413 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:52:19,414 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:52:19,415 INFO L256 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-03 19:52:19,417 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:52:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:19,603 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:52:19,603 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-03 19:52:19,604 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 19:52:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 19:52:19,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2019-09-03 19:52:19,605 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 16 states. [2019-09-03 19:52:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:19,832 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2019-09-03 19:52:19,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:52:19,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-09-03 19:52:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:19,834 INFO L225 Difference]: With dead ends: 52 [2019-09-03 19:52:19,834 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 19:52:19,835 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2019-09-03 19:52:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 19:52:19,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-09-03 19:52:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 19:52:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-03 19:52:19,840 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2019-09-03 19:52:19,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:19,841 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-03 19:52:19,841 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 19:52:19,841 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-03 19:52:19,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 19:52:19,842 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:19,842 INFO L399 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:19,842 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:19,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:19,843 INFO L82 PathProgramCache]: Analyzing trace with hash -767923148, now seen corresponding path program 1 times [2019-09-03 19:52:19,843 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:19,843 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:19,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:19,844 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:52:19,844 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:24,067 WARN L188 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 15 [2019-09-03 19:52:24,124 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:24,124 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:52:24,124 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:52:24,138 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:24,155 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 19:52:24,156 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:52:24,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 19:52:24,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:52:24,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-09-03 19:52:24,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 19:52:24,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 19:52:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:52:24,197 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 9 states. [2019-09-03 19:52:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:24,261 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-09-03 19:52:24,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 19:52:24,262 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-09-03 19:52:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:24,263 INFO L225 Difference]: With dead ends: 40 [2019-09-03 19:52:24,263 INFO L226 Difference]: Without dead ends: 29 [2019-09-03 19:52:24,263 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:52:24,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-03 19:52:24,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-09-03 19:52:24,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 19:52:24,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-09-03 19:52:24,268 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 22 [2019-09-03 19:52:24,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:24,268 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-09-03 19:52:24,268 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 19:52:24,269 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-09-03 19:52:24,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 19:52:24,270 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:52:24,270 INFO L399 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:52:24,270 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:52:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:52:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash 54730258, now seen corresponding path program 3 times [2019-09-03 19:52:24,271 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:52:24,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:52:24,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:24,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:52:24,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:52:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:52:24,662 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:24,662 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:52:24,662 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 19:52:24,689 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:52:24,721 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-09-03 19:52:24,721 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:52:24,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 50 conjunts are in the unsatisfiable core [2019-09-03 19:52:24,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:52:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:52:25,158 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:52:25,158 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2019-09-03 19:52:25,160 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 19:52:25,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 19:52:25,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2019-09-03 19:52:25,162 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2019-09-03 19:52:25,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:52:25,585 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2019-09-03 19:52:25,586 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 19:52:25,586 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2019-09-03 19:52:25,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:52:25,587 INFO L225 Difference]: With dead ends: 34 [2019-09-03 19:52:25,588 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 19:52:25,590 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 19:52:25,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 19:52:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 19:52:25,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 19:52:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 19:52:25,591 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-09-03 19:52:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:52:25,591 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 19:52:25,591 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 19:52:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 19:52:25,592 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 19:52:25,596 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-03 19:52:25,670 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-03 19:52:25,670 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-03 19:52:25,671 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-03 19:52:25,671 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-03 19:52:25,671 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-03 19:52:25,671 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-03 19:52:25,671 INFO L443 ceAbstractionStarter]: For program point L31(lines 31 33) no Hoare annotation was computed. [2019-09-03 19:52:25,671 INFO L443 ceAbstractionStarter]: For program point L25(lines 25 29) no Hoare annotation was computed. [2019-09-03 19:52:25,671 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 35) no Hoare annotation was computed. [2019-09-03 19:52:25,672 INFO L443 ceAbstractionStarter]: For program point L25-2(lines 10 35) no Hoare annotation was computed. [2019-09-03 19:52:25,672 INFO L443 ceAbstractionStarter]: For program point L21(lines 21 30) no Hoare annotation was computed. [2019-09-03 19:52:25,672 INFO L443 ceAbstractionStarter]: For program point L21-2(lines 10 35) no Hoare annotation was computed. [2019-09-03 19:52:25,672 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 35) no Hoare annotation was computed. [2019-09-03 19:52:25,672 INFO L439 ceAbstractionStarter]: At program point L32(line 32) the Hoare annotation is: (= (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0) (+ (* 4294967296 (div main_~b~0 4294967296)) main_~a~0)) [2019-09-03 19:52:25,672 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 35) the Hoare annotation is: true [2019-09-03 19:52:25,673 INFO L443 ceAbstractionStarter]: For program point L16(lines 16 20) no Hoare annotation was computed. [2019-09-03 19:52:25,673 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2019-09-03 19:52:25,673 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2019-09-03 19:52:25,673 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-09-03 19:52:25,673 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-09-03 19:52:25,673 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-09-03 19:52:25,674 INFO L443 ceAbstractionStarter]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2019-09-03 19:52:25,676 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 07:52:25 BoogieIcfgContainer [2019-09-03 19:52:25,676 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 19:52:25,678 INFO L168 Benchmark]: Toolchain (without parser) took 8631.19 ms. Allocated memory was 133.7 MB in the beginning and 258.5 MB in the end (delta: 124.8 MB). Free memory was 88.8 MB in the beginning and 86.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 127.5 MB. Max. memory is 7.1 GB. [2019-09-03 19:52:25,679 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 133.7 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 19:52:25,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.55 ms. Allocated memory is still 133.7 MB. Free memory was 88.6 MB in the beginning and 79.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-09-03 19:52:25,681 INFO L168 Benchmark]: Boogie Preprocessor took 126.02 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 79.2 MB in the beginning and 176.8 MB in the end (delta: -97.6 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-03 19:52:25,682 INFO L168 Benchmark]: RCFGBuilder took 253.14 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 164.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2019-09-03 19:52:25,683 INFO L168 Benchmark]: TraceAbstraction took 7998.82 ms. Allocated memory was 200.3 MB in the beginning and 258.5 MB in the end (delta: 58.2 MB). Free memory was 164.8 MB in the beginning and 86.1 MB in the end (delta: 78.7 MB). Peak memory consumption was 136.9 MB. Max. memory is 7.1 GB. [2019-09-03 19:52:25,687 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 133.7 MB. Free memory was 106.7 MB in the beginning and 106.5 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.55 ms. Allocated memory is still 133.7 MB. Free memory was 88.6 MB in the beginning and 79.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.02 ms. Allocated memory was 133.7 MB in the beginning and 200.3 MB in the end (delta: 66.6 MB). Free memory was 79.2 MB in the beginning and 176.8 MB in the end (delta: -97.6 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 253.14 ms. Allocated memory is still 200.3 MB. Free memory was 176.8 MB in the beginning and 164.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7998.82 ms. Allocated memory was 200.3 MB in the beginning and 258.5 MB in the end (delta: 58.2 MB). Free memory was 164.8 MB in the beginning and 86.1 MB in the end (delta: 78.7 MB). Peak memory consumption was 136.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. SAFE Result, 7.9s OverallTime, 7 OverallIterations, 6 TraceHistogramMax, 0.9s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 119 SDtfs, 48 SDslu, 612 SDs, 0 SdLazy, 438 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 5.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 17 PreInvPairs, 25 NumberOfFragments, 20 HoareAnnotationTreeSize, 17 FomulaSimplifications, 55 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 130 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.2s InterpolantComputationTime, 211 NumberOfCodeBlocks, 211 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 200 ConstructedInterpolants, 0 QuantifiedInterpolants, 32878 SizeOfPredicates, 10 NumberOfNonLiveVariables, 290 ConjunctsInSsa, 101 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 18/130 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...