/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:25:52,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:25:52,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:25:52,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:25:52,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:25:52,048 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:25:52,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:25:52,053 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:25:52,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:25:52,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:25:52,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:25:52,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:25:52,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:25:52,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:25:52,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:25:52,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:25:52,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:25:52,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:25:52,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:25:52,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:25:52,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:25:52,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:25:52,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:25:52,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:25:52,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:25:52,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:25:52,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:25:52,084 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:25:52,085 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 [2019-11-23 20:25:52,099 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:25:52,100 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:25:52,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:25:52,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:25:52,101 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:25:52,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:25:52,101 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:25:52,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:25:52,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:25:52,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:25:52,102 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:25:52,102 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:25:52,103 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:25:52,103 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:25:52,103 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:25:52,103 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:25:52,103 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:25:52,104 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:25:52,104 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:25:52,104 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:25:52,104 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:25:52,104 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:25:52,105 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:25:52,105 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:25:52,105 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:25:52,105 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:25:52,105 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:25:52,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:25:52,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:25:52,106 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:25:52,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:25:52,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:25:52,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:25:52,378 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:25:52,378 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:25:52,379 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-11-23 20:25:52,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c1b2465/13b0c9b846624273a65b47f54b805526/FLAG0a38d69c4 [2019-11-23 20:25:52,900 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:25:52,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copyInitSum3_ground.i [2019-11-23 20:25:52,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c1b2465/13b0c9b846624273a65b47f54b805526/FLAG0a38d69c4 [2019-11-23 20:25:53,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4c1b2465/13b0c9b846624273a65b47f54b805526 [2019-11-23 20:25:53,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:25:53,310 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:25:53,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:53,311 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:25:53,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:25:53,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a32c64f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53, skipping insertion in model container [2019-11-23 20:25:53,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:25:53,346 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:25:53,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:53,517 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:25:53,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:25:53,557 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:25:53,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53 WrapperNode [2019-11-23 20:25:53,558 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:25:53,559 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:53,559 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:25:53,559 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:25:53,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:25:53,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:25:53,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:25:53,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:25:53,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,691 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,703 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (1/1) ... [2019-11-23 20:25:53,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:25:53,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:25:53,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:25:53,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:25:53,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (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 [2019-11-23 20:25:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:25:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:25:53,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:25:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:25:53,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:25:53,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:25:54,022 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:25:54,022 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:25:54,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:54 BoogieIcfgContainer [2019-11-23 20:25:54,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:25:54,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:25:54,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:25:54,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:25:54,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:25:53" (1/3) ... [2019-11-23 20:25:54,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7580f5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:54, skipping insertion in model container [2019-11-23 20:25:54,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:25:53" (2/3) ... [2019-11-23 20:25:54,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7580f5af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:25:54, skipping insertion in model container [2019-11-23 20:25:54,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:25:54" (3/3) ... [2019-11-23 20:25:54,033 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2019-11-23 20:25:54,045 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:25:54,056 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:25:54,074 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:25:54,104 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:25:54,105 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:25:54,105 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:25:54,105 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:25:54,105 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:25:54,105 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:25:54,105 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:25:54,106 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:25:54,123 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:25:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:25:54,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,131 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:54,131 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:54,138 INFO L82 PathProgramCache]: Analyzing trace with hash -211808190, now seen corresponding path program 1 times [2019-11-23 20:25:54,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:54,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859299483] [2019-11-23 20:25:54,148 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:25:54,306 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859299483] [2019-11-23 20:25:54,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:25:54,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:25:54,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765367561] [2019-11-23 20:25:54,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:25:54,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:54,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:25:54,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:25:54,335 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-23 20:25:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:54,483 INFO L93 Difference]: Finished difference Result 50 states and 76 transitions. [2019-11-23 20:25:54,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:25:54,486 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:25:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:54,501 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:25:54,501 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:25:54,507 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 [2019-11-23 20:25:54,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:25:54,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2019-11-23 20:25:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:25:54,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2019-11-23 20:25:54,560 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2019-11-23 20:25:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:54,561 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2019-11-23 20:25:54,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:25:54,562 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2019-11-23 20:25:54,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:25:54,563 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,564 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:54,565 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:54,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:54,566 INFO L82 PathProgramCache]: Analyzing trace with hash 343774103, now seen corresponding path program 1 times [2019-11-23 20:25:54,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:54,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229871649] [2019-11-23 20:25:54,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:25:54,693 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229871649] [2019-11-23 20:25:54,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368627765] [2019-11-23 20:25:54,694 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 [2019-11-23 20:25:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:54,762 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:25:54,770 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:54,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:25:54,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:54,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:25:54,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77746836] [2019-11-23 20:25:54,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:25:54,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:54,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:25:54,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:54,817 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 5 states. [2019-11-23 20:25:54,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:54,918 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2019-11-23 20:25:54,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:25:54,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-23 20:25:54,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:54,920 INFO L225 Difference]: With dead ends: 52 [2019-11-23 20:25:54,920 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 20:25:54,921 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:25:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 20:25:54,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-11-23 20:25:54,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:25:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-11-23 20:25:54,928 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-11-23 20:25:54,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:54,928 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-23 20:25:54,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:25:54,928 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-11-23 20:25:54,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:25:54,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:54,930 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:55,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:55,135 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:55,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:55,136 INFO L82 PathProgramCache]: Analyzing trace with hash -314392746, now seen corresponding path program 2 times [2019-11-23 20:25:55,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:55,136 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59355106] [2019-11-23 20:25:55,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:25:55,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59355106] [2019-11-23 20:25:55,238 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841787834] [2019-11-23 20:25:55,238 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-11-23 20:25:55,316 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:55,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:55,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:25:55,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:25:55,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:55,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:25:55,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382680603] [2019-11-23 20:25:55,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:25:55,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:55,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:25:55,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:55,352 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2019-11-23 20:25:55,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:55,469 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2019-11-23 20:25:55,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:25:55,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2019-11-23 20:25:55,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:55,471 INFO L225 Difference]: With dead ends: 65 [2019-11-23 20:25:55,471 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:25:55,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:25:55,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:25:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2019-11-23 20:25:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 20:25:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-11-23 20:25:55,479 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 27 [2019-11-23 20:25:55,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:55,480 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-11-23 20:25:55,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:25:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-11-23 20:25:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:25:55,481 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:55,481 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:55,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:55,694 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:55,694 INFO L82 PathProgramCache]: Analyzing trace with hash -881131413, now seen corresponding path program 3 times [2019-11-23 20:25:55,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:55,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104908336] [2019-11-23 20:25:55,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:25:55,814 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104908336] [2019-11-23 20:25:55,815 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198290218] [2019-11-23 20:25:55,816 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 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 [2019-11-23 20:25:55,868 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:25:55,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:55,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:25:55,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:25:55,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:55,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:25:55,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461792548] [2019-11-23 20:25:55,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:25:55,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:25:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:25:55,891 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-11-23 20:25:56,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:56,001 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2019-11-23 20:25:56,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:25:56,002 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-11-23 20:25:56,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:56,003 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:25:56,003 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:25:56,004 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:25:56,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:25:56,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-23 20:25:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:25:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2019-11-23 20:25:56,011 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 34 [2019-11-23 20:25:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:56,012 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2019-11-23 20:25:56,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:25:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2019-11-23 20:25:56,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:25:56,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:56,013 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:56,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:56,218 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:56,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:56,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1712584598, now seen corresponding path program 4 times [2019-11-23 20:25:56,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:56,219 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722353750] [2019-11-23 20:25:56,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:25:56,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722353750] [2019-11-23 20:25:56,360 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657499423] [2019-11-23 20:25:56,360 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 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 [2019-11-23 20:25:56,426 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:25:56,426 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:56,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:25:56,433 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:25:56,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:56,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:25:56,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010416574] [2019-11-23 20:25:56,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:25:56,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:25:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:56,459 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 8 states. [2019-11-23 20:25:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:56,596 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2019-11-23 20:25:56,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:25:56,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2019-11-23 20:25:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:56,598 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:25:56,600 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:25:56,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:25:56,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:25:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2019-11-23 20:25:56,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 20:25:56,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-23 20:25:56,614 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 41 [2019-11-23 20:25:56,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:56,615 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-23 20:25:56,615 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:25:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-23 20:25:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:25:56,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:56,619 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:56,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:56,823 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:56,824 INFO L82 PathProgramCache]: Analyzing trace with hash 702691135, now seen corresponding path program 5 times [2019-11-23 20:25:56,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:56,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237340837] [2019-11-23 20:25:56,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:56,943 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:25:56,943 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237340837] [2019-11-23 20:25:56,944 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131968232] [2019-11-23 20:25:56,944 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:58,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:25:58,068 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:58,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:25:58,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-23 20:25:58,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:58,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:25:58,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796097027] [2019-11-23 20:25:58,101 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:25:58,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:58,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:25:58,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:58,102 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 9 states. [2019-11-23 20:25:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:58,273 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2019-11-23 20:25:58,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:25:58,274 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2019-11-23 20:25:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:58,274 INFO L225 Difference]: With dead ends: 104 [2019-11-23 20:25:58,275 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:25:58,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:25:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:25:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2019-11-23 20:25:58,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:25:58,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2019-11-23 20:25:58,283 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 48 [2019-11-23 20:25:58,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:58,283 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2019-11-23 20:25:58,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:25:58,284 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2019-11-23 20:25:58,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:25:58,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:58,285 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:58,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:58,500 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:58,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:58,501 INFO L82 PathProgramCache]: Analyzing trace with hash 240839550, now seen corresponding path program 6 times [2019-11-23 20:25:58,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:58,501 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620874807] [2019-11-23 20:25:58,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,621 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-11-23 20:25:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620874807] [2019-11-23 20:25:58,622 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417001235] [2019-11-23 20:25:58,622 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:59,129 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:25:59,130 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:59,132 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:25:59,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:25:59,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:59,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:25:59,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257744624] [2019-11-23 20:25:59,160 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:25:59,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:59,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:25:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:59,161 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand 10 states. [2019-11-23 20:25:59,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:59,283 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2019-11-23 20:25:59,284 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:25:59,284 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-11-23 20:25:59,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:59,284 INFO L225 Difference]: With dead ends: 117 [2019-11-23 20:25:59,285 INFO L226 Difference]: Without dead ends: 68 [2019-11-23 20:25:59,285 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:59,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-23 20:25:59,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2019-11-23 20:25:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 20:25:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-23 20:25:59,292 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 55 [2019-11-23 20:25:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:59,293 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-23 20:25:59,293 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:25:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-23 20:25:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 20:25:59,294 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:59,294 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:59,495 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:59,495 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:59,496 INFO L82 PathProgramCache]: Analyzing trace with hash -2046937069, now seen corresponding path program 7 times [2019-11-23 20:25:59,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:59,497 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572592692] [2019-11-23 20:25:59,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:59,603 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:25:59,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572592692] [2019-11-23 20:25:59,604 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541474707] [2019-11-23 20:25:59,604 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:59,668 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:25:59,671 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:59,689 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 20:25:59,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:59,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:25:59,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082325186] [2019-11-23 20:25:59,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:25:59,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:59,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:25:59,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:59,691 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 11 states. [2019-11-23 20:25:59,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:59,827 INFO L93 Difference]: Finished difference Result 130 states and 141 transitions. [2019-11-23 20:25:59,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:25:59,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2019-11-23 20:25:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:59,828 INFO L225 Difference]: With dead ends: 130 [2019-11-23 20:25:59,828 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 20:25:59,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:59,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 20:25:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-11-23 20:25:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-23 20:25:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2019-11-23 20:25:59,837 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 62 [2019-11-23 20:25:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:59,837 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2019-11-23 20:25:59,837 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:25:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2019-11-23 20:25:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:25:59,838 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:59,839 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:00,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:00,054 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:00,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1433507694, now seen corresponding path program 8 times [2019-11-23 20:26:00,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:00,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226420015] [2019-11-23 20:26:00,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:26:00,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226420015] [2019-11-23 20:26:00,202 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367051574] [2019-11-23 20:26:00,203 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:00,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:26:00,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:00,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:26:00,275 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-23 20:26:00,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:00,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:26:00,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234857321] [2019-11-23 20:26:00,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:26:00,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:26:00,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:26:00,309 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 12 states. [2019-11-23 20:26:00,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:00,445 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2019-11-23 20:26:00,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:26:00,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 69 [2019-11-23 20:26:00,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:00,447 INFO L225 Difference]: With dead ends: 143 [2019-11-23 20:26:00,447 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:26:00,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:26:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:26:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2019-11-23 20:26:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:26:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-23 20:26:00,455 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 69 [2019-11-23 20:26:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:00,455 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-23 20:26:00,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:26:00,456 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-23 20:26:00,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:26:00,457 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:00,457 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:00,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:00,669 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:00,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:00,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1545208551, now seen corresponding path program 9 times [2019-11-23 20:26:00,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:00,670 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151222789] [2019-11-23 20:26:00,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-11-23 20:26:00,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151222789] [2019-11-23 20:26:00,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880153855] [2019-11-23 20:26:00,806 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:01,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:26:01,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:01,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:26:01,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2019-11-23 20:26:01,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:01,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:26:01,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256499167] [2019-11-23 20:26:01,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:26:01,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:26:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:26:01,328 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 13 states. [2019-11-23 20:26:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:01,492 INFO L93 Difference]: Finished difference Result 156 states and 167 transitions. [2019-11-23 20:26:01,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:26:01,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-23 20:26:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:01,493 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:26:01,494 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:26:01,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:26:01,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:26:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2019-11-23 20:26:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-23 20:26:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2019-11-23 20:26:01,508 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 76 [2019-11-23 20:26:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:01,508 INFO L462 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2019-11-23 20:26:01,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:26:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2019-11-23 20:26:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-23 20:26:01,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:01,516 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:01,716 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:01,717 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:01,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:01,718 INFO L82 PathProgramCache]: Analyzing trace with hash -108691546, now seen corresponding path program 10 times [2019-11-23 20:26:01,718 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:01,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699565639] [2019-11-23 20:26:01,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:26:01,884 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699565639] [2019-11-23 20:26:01,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937639194] [2019-11-23 20:26:01,885 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:01,952 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:01,952 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:01,955 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:26:01,958 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2019-11-23 20:26:01,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:01,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:26:01,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544494457] [2019-11-23 20:26:01,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:26:01,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:01,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:26:01,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:01,990 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand 14 states. [2019-11-23 20:26:02,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:02,151 INFO L93 Difference]: Finished difference Result 169 states and 180 transitions. [2019-11-23 20:26:02,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:26:02,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2019-11-23 20:26:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:02,153 INFO L225 Difference]: With dead ends: 169 [2019-11-23 20:26:02,153 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:26:02,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:26:02,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:26:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 93. [2019-11-23 20:26:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 20:26:02,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-11-23 20:26:02,160 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 83 [2019-11-23 20:26:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:02,161 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-11-23 20:26:02,161 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:26:02,161 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-11-23 20:26:02,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-23 20:26:02,162 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:02,162 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:26:02,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:02,371 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:02,372 INFO L82 PathProgramCache]: Analyzing trace with hash -293562437, now seen corresponding path program 11 times [2019-11-23 20:26:02,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:02,372 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388441001] [2019-11-23 20:26:02,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-11-23 20:26:02,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388441001] [2019-11-23 20:26:02,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976966950] [2019-11-23 20:26:02,523 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true