/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_partial_init_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:31:38,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:31:38,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:31:38,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:31:38,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:31:38,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:31:38,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:31:38,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:31:38,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:31:38,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:31:38,899 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:31:38,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:31:38,901 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:31:38,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:31:38,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:31:38,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:31:38,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:31:38,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:31:38,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:31:38,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:31:38,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:31:38,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:31:38,924 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:31:38,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:31:38,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:31:38,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:31:38,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:31:38,938 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:31:38,939 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 20:31:38,971 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:31:38,971 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:31:38,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:31:38,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:31:38,973 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:31:38,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:31:38,973 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:31:38,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:31:38,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:31:38,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:31:38,974 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:31:38,974 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:31:38,974 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:31:38,974 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:31:38,975 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:31:38,975 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:31:38,975 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:31:38,975 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:31:38,975 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:31:38,976 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:31:38,976 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:31:38,976 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:31:38,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:31:38,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:31:38,977 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:31:38,977 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:31:38,977 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:31:38,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:31:38,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:31:38,978 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:31:39,243 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:31:39,259 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:31:39,262 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:31:39,264 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:31:39,264 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:31:39,265 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-11-23 20:31:39,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83bd2f9e9/3250be78fc294948b5c9168b6e034b2d/FLAG4e8a76a8f [2019-11-23 20:31:39,810 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:31:39,811 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_partial_init_ground.i [2019-11-23 20:31:39,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83bd2f9e9/3250be78fc294948b5c9168b6e034b2d/FLAG4e8a76a8f [2019-11-23 20:31:40,160 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83bd2f9e9/3250be78fc294948b5c9168b6e034b2d [2019-11-23 20:31:40,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:31:40,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:31:40,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:40,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:31:40,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:31:40,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f6a1297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40, skipping insertion in model container [2019-11-23 20:31:40,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:31:40,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:31:40,402 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:40,406 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:31:40,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:31:40,444 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:31:40,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40 WrapperNode [2019-11-23 20:31:40,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:31:40,446 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:40,446 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:31:40,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:31:40,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,574 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:31:40,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:31:40,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:31:40,575 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:31:40,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,591 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (1/1) ... [2019-11-23 20:31:40,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:31:40,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:31:40,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:31:40,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:31:40,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (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 20:31:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:31:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:31:40,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:31:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:31:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:31:40,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:31:40,947 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:31:40,947 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:31:40,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:40 BoogieIcfgContainer [2019-11-23 20:31:40,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:31:40,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:31:40,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:31:40,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:31:40,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:31:40" (1/3) ... [2019-11-23 20:31:40,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278cdaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:40, skipping insertion in model container [2019-11-23 20:31:40,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:31:40" (2/3) ... [2019-11-23 20:31:40,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@278cdaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:31:40, skipping insertion in model container [2019-11-23 20:31:40,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:31:40" (3/3) ... [2019-11-23 20:31:40,957 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_partial_init_ground.i [2019-11-23 20:31:40,977 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:31:40,983 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-23 20:31:41,003 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-23 20:31:41,025 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:31:41,025 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:31:41,025 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:31:41,026 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:31:41,026 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:31:41,026 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:31:41,026 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:31:41,026 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:31:41,041 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 20:31:41,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:41,048 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,049 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,049 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,054 INFO L82 PathProgramCache]: Analyzing trace with hash -2006137184, now seen corresponding path program 1 times [2019-11-23 20:31:41,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,062 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575382252] [2019-11-23 20:31:41,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,183 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 20:31:41,184 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575382252] [2019-11-23 20:31:41,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:41,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:31:41,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550883490] [2019-11-23 20:31:41,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:31:41,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:31:41,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:31:41,208 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-23 20:31:41,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,225 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2019-11-23 20:31:41,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:31:41,226 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2019-11-23 20:31:41,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,234 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:31:41,234 INFO L226 Difference]: Without dead ends: 22 [2019-11-23 20:31:41,238 INFO L630 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 [2019-11-23 20:31:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-23 20:31:41,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-11-23 20:31:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:31:41,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2019-11-23 20:31:41,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 9 [2019-11-23 20:31:41,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,270 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-11-23 20:31:41,270 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:31:41,270 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2019-11-23 20:31:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:31:41,271 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,271 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,272 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,272 INFO L82 PathProgramCache]: Analyzing trace with hash -2016295915, now seen corresponding path program 1 times [2019-11-23 20:31:41,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144945743] [2019-11-23 20:31:41,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,326 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 20:31:41,327 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144945743] [2019-11-23 20:31:41,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:31:41,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:31:41,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254699104] [2019-11-23 20:31:41,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:31:41,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:31:41,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:31:41,331 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2019-11-23 20:31:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,386 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2019-11-23 20:31:41,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:31:41,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:31:41,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,388 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:31:41,388 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 20:31:41,389 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 20:31:41,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 20:31:41,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2019-11-23 20:31:41,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-23 20:31:41,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2019-11-23 20:31:41,396 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2019-11-23 20:31:41,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,396 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2019-11-23 20:31:41,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:31:41,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2019-11-23 20:31:41,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:31:41,398 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,398 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,398 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash -324137903, now seen corresponding path program 1 times [2019-11-23 20:31:41,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942589727] [2019-11-23 20:31:41,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:41,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942589727] [2019-11-23 20:31:41,469 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838968910] [2019-11-23 20:31:41,470 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 20:31:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:41,553 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:31:41,559 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:41,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:31:41,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:41,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:31:41,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988029620] [2019-11-23 20:31:41,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:31:41,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:41,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:31:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:31:41,604 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2019-11-23 20:31:41,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:41,676 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2019-11-23 20:31:41,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:31:41,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:31:41,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:41,677 INFO L225 Difference]: With dead ends: 51 [2019-11-23 20:31:41,677 INFO L226 Difference]: Without dead ends: 32 [2019-11-23 20:31:41,678 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 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 20:31:41,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-23 20:31:41,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2019-11-23 20:31:41,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:31:41,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-23 20:31:41,684 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 14 [2019-11-23 20:31:41,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:41,684 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-23 20:31:41,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:31:41,685 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-23 20:31:41,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:31:41,685 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:41,686 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:41,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:41,889 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1735604177, now seen corresponding path program 2 times [2019-11-23 20:31:41,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:41,891 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280356039] [2019-11-23 20:31:41,891 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:42,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280356039] [2019-11-23 20:31:42,010 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674228077] [2019-11-23 20:31:42,010 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 20:31:42,069 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:42,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:42,071 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:31:42,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:31:42,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848202561] [2019-11-23 20:31:42,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:31:42,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:31:42,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:31:42,091 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 6 states. [2019-11-23 20:31:42,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,175 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2019-11-23 20:31:42,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:31:42,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-23 20:31:42,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,177 INFO L225 Difference]: With dead ends: 59 [2019-11-23 20:31:42,178 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:31:42,178 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 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 20:31:42,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:31:42,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2019-11-23 20:31:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:31:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-23 20:31:42,185 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2019-11-23 20:31:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,186 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-23 20:31:42,186 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:31:42,186 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-23 20:31:42,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:31:42,187 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,187 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,392 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,393 INFO L82 PathProgramCache]: Analyzing trace with hash 962598037, now seen corresponding path program 3 times [2019-11-23 20:31:42,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060182221] [2019-11-23 20:31:42,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:31:42,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060182221] [2019-11-23 20:31:42,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615521291] [2019-11-23 20:31:42,508 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 20:31:42,587 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:31:42,588 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:42,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:31:42,593 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:31:42,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:42,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:31:42,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602270084] [2019-11-23 20:31:42,612 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:31:42,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:42,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:31:42,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:31:42,613 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 7 states. [2019-11-23 20:31:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:42,692 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2019-11-23 20:31:42,693 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:31:42,693 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2019-11-23 20:31:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:42,693 INFO L225 Difference]: With dead ends: 67 [2019-11-23 20:31:42,693 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:31:42,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 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 20:31:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:31:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2019-11-23 20:31:42,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:31:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2019-11-23 20:31:42,699 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 24 [2019-11-23 20:31:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:42,701 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2019-11-23 20:31:42,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:31:42,701 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2019-11-23 20:31:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:31:42,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:42,704 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:42,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:42,908 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:42,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:42,908 INFO L82 PathProgramCache]: Analyzing trace with hash 668967821, now seen corresponding path program 4 times [2019-11-23 20:31:42,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:42,910 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543690849] [2019-11-23 20:31:42,910 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,048 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:43,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543690849] [2019-11-23 20:31:43,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410780544] [2019-11-23 20:31:43,049 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 20:31:43,112 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:43,112 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,113 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-11-23 20:31:43,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:43,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-23 20:31:43,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155764421] [2019-11-23 20:31:43,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:31:43,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:43,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:31:43,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:31:43,140 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand 8 states. [2019-11-23 20:31:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:43,246 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2019-11-23 20:31:43,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:31:43,247 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-23 20:31:43,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:43,248 INFO L225 Difference]: With dead ends: 75 [2019-11-23 20:31:43,248 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:31:43,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 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 20:31:43,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:31:43,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2019-11-23 20:31:43,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:31:43,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2019-11-23 20:31:43,265 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 29 [2019-11-23 20:31:43,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:43,265 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2019-11-23 20:31:43,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:31:43,265 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2019-11-23 20:31:43,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:31:43,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:43,266 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:43,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:43,474 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:43,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1015235801, now seen corresponding path program 5 times [2019-11-23 20:31:43,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:43,475 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190210124] [2019-11-23 20:31:43,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:43,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190210124] [2019-11-23 20:31:43,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220754881] [2019-11-23 20:31:43,596 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 20:31:43,980 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:31:43,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:43,982 INFO L255 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:31:43,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-23 20:31:44,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-11-23 20:31:44,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842442743] [2019-11-23 20:31:44,002 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:31:44,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:31:44,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:31:44,003 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand 9 states. [2019-11-23 20:31:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,100 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2019-11-23 20:31:44,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:31:44,101 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2019-11-23 20:31:44,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,102 INFO L225 Difference]: With dead ends: 83 [2019-11-23 20:31:44,102 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:31:44,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 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 20:31:44,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:31:44,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2019-11-23 20:31:44,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:31:44,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2019-11-23 20:31:44,114 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 34 [2019-11-23 20:31:44,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,115 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2019-11-23 20:31:44,115 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:31:44,115 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2019-11-23 20:31:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:31:44,118 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,119 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:44,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:44,320 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:44,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:44,321 INFO L82 PathProgramCache]: Analyzing trace with hash 169789257, now seen corresponding path program 6 times [2019-11-23 20:31:44,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:44,322 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083655169] [2019-11-23 20:31:44,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-11-23 20:31:44,506 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083655169] [2019-11-23 20:31:44,507 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130551087] [2019-11-23 20:31:44,507 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 20:31:44,750 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:31:44,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:44,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:31:44,754 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:44,780 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:31:44,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:44,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:31:44,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7733480] [2019-11-23 20:31:44,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:31:44,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:44,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:31:44,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:31:44,783 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand 10 states. [2019-11-23 20:31:44,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:44,891 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2019-11-23 20:31:44,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:31:44,892 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-11-23 20:31:44,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:44,892 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:31:44,893 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:31:44,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 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 20:31:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:31:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2019-11-23 20:31:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:31:44,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2019-11-23 20:31:44,899 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 39 [2019-11-23 20:31:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:44,900 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2019-11-23 20:31:44,900 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:31:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2019-11-23 20:31:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:31:44,901 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:44,901 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:45,101 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:45,102 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash 244309277, now seen corresponding path program 7 times [2019-11-23 20:31:45,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:45,103 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679635148] [2019-11-23 20:31:45,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:45,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679635148] [2019-11-23 20:31:45,222 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733182998] [2019-11-23 20:31:45,222 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 20:31:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:31:45,297 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:45,320 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-23 20:31:45,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:45,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:31:45,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365779022] [2019-11-23 20:31:45,321 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:31:45,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:45,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:31:45,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:31:45,325 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 11 states. [2019-11-23 20:31:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:45,420 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2019-11-23 20:31:45,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:31:45,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2019-11-23 20:31:45,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:45,421 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:31:45,421 INFO L226 Difference]: Without dead ends: 62 [2019-11-23 20:31:45,424 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 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 20:31:45,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-23 20:31:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2019-11-23 20:31:45,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:31:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2019-11-23 20:31:45,438 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 44 [2019-11-23 20:31:45,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:45,439 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2019-11-23 20:31:45,439 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:31:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2019-11-23 20:31:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:31:45,440 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:45,440 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:45,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:45,647 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1422367995, now seen corresponding path program 8 times [2019-11-23 20:31:45,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:45,648 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88173321] [2019-11-23 20:31:45,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:45,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88173321] [2019-11-23 20:31:45,799 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783362733] [2019-11-23 20:31:45,799 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 20:31:45,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:31:45,869 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:45,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:31:45,881 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-11-23 20:31:45,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:45,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-11-23 20:31:45,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223028183] [2019-11-23 20:31:45,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:31:45,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:31:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:31:45,921 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand 12 states. [2019-11-23 20:31:46,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:46,070 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2019-11-23 20:31:46,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:31:46,070 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2019-11-23 20:31:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:46,071 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:31:46,071 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:31:46,074 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 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 20:31:46,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:31:46,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2019-11-23 20:31:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:31:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-11-23 20:31:46,085 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 49 [2019-11-23 20:31:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:46,085 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-11-23 20:31:46,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:31:46,086 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-11-23 20:31:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:31:46,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:46,087 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:46,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:46,292 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:46,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:46,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1308499297, now seen corresponding path program 9 times [2019-11-23 20:31:46,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:46,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266600308] [2019-11-23 20:31:46,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:46,418 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:46,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266600308] [2019-11-23 20:31:46,419 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496886360] [2019-11-23 20:31:46,419 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 20:31:48,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 20:31:48,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:48,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:31:48,259 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:48,277 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 20:31:48,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:48,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:31:48,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87161397] [2019-11-23 20:31:48,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:31:48,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:48,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:31:48,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:31:48,279 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 13 states. [2019-11-23 20:31:48,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:48,430 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2019-11-23 20:31:48,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:31:48,430 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2019-11-23 20:31:48,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:48,431 INFO L225 Difference]: With dead ends: 115 [2019-11-23 20:31:48,431 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:31:48,432 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 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 20:31:48,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:31:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2019-11-23 20:31:48,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:31:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2019-11-23 20:31:48,437 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 54 [2019-11-23 20:31:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:48,438 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2019-11-23 20:31:48,438 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:31:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2019-11-23 20:31:48,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:31:48,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:48,439 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:48,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:48,645 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:48,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1077163713, now seen corresponding path program 10 times [2019-11-23 20:31:48,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:48,646 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891292910] [2019-11-23 20:31:48,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:48,797 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:48,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891292910] [2019-11-23 20:31:48,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549609917] [2019-11-23 20:31:48,798 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 20:31:48,917 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:31:48,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:48,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:31:48,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-11-23 20:31:48,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:48,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2019-11-23 20:31:48,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129084044] [2019-11-23 20:31:48,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 20:31:48,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 20:31:48,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-23 20:31:48,966 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand 14 states. [2019-11-23 20:31:49,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:49,100 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2019-11-23 20:31:49,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:31:49,101 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2019-11-23 20:31:49,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:49,103 INFO L225 Difference]: With dead ends: 123 [2019-11-23 20:31:49,103 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 20:31:49,104 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 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 20:31:49,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 20:31:49,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2019-11-23 20:31:49,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-23 20:31:49,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2019-11-23 20:31:49,109 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 59 [2019-11-23 20:31:49,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:49,110 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2019-11-23 20:31:49,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 20:31:49,110 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2019-11-23 20:31:49,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 20:31:49,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:49,111 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:49,315 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:49,316 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash -481933915, now seen corresponding path program 11 times [2019-11-23 20:31:49,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:49,317 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673072437] [2019-11-23 20:31:49,317 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:49,453 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673072437] [2019-11-23 20:31:49,454 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330161387] [2019-11-23 20:31:49,454 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 [2019-11-23 20:31:59,370 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 20:31:59,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:31:59,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:31:59,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:31:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-11-23 20:31:59,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:31:59,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:31:59,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637310685] [2019-11-23 20:31:59,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:31:59,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:31:59,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:31:59,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:59,408 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand 15 states. [2019-11-23 20:31:59,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:31:59,575 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2019-11-23 20:31:59,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-23 20:31:59,576 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2019-11-23 20:31:59,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:31:59,577 INFO L225 Difference]: With dead ends: 131 [2019-11-23 20:31:59,577 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:31:59,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:31:59,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:31:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2019-11-23 20:31:59,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 20:31:59,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2019-11-23 20:31:59,583 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 64 [2019-11-23 20:31:59,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:31:59,583 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2019-11-23 20:31:59,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:31:59,583 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2019-11-23 20:31:59,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:31:59,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:31:59,585 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:31:59,785 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:31:59,786 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:31:59,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:31:59,786 INFO L82 PathProgramCache]: Analyzing trace with hash -770047363, now seen corresponding path program 12 times [2019-11-23 20:31:59,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:31:59,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085567271] [2019-11-23 20:31:59,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:31:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:31:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-11-23 20:31:59,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085567271] [2019-11-23 20:31:59,950 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872007729] [2019-11-23 20:31:59,950 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:18,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:32:18,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:18,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:32:18,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-11-23 20:32:18,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:18,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:32:18,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697143302] [2019-11-23 20:32:18,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:32:18,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:18,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:32:18,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:32:18,591 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 16 states. [2019-11-23 20:32:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:18,745 INFO L93 Difference]: Finished difference Result 139 states and 172 transitions. [2019-11-23 20:32:18,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:32:18,746 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2019-11-23 20:32:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:18,747 INFO L225 Difference]: With dead ends: 139 [2019-11-23 20:32:18,747 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:32:18,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:32:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:32:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-11-23 20:32:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:32:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2019-11-23 20:32:18,755 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 69 [2019-11-23 20:32:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:18,755 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2019-11-23 20:32:18,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:32:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2019-11-23 20:32:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 20:32:18,757 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:18,762 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:18,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:18,963 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:18,964 INFO L82 PathProgramCache]: Analyzing trace with hash -991914519, now seen corresponding path program 13 times [2019-11-23 20:32:18,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:18,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354167037] [2019-11-23 20:32:18,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:18,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:32:19,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354167037] [2019-11-23 20:32:19,137 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637191638] [2019-11-23 20:32:19,138 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:19,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:32:19,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-11-23 20:32:19,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:19,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-11-23 20:32:19,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441973934] [2019-11-23 20:32:19,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:32:19,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:19,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:32:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:32:19,293 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 17 states. [2019-11-23 20:32:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:19,473 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2019-11-23 20:32:19,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:32:19,474 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2019-11-23 20:32:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:19,475 INFO L225 Difference]: With dead ends: 147 [2019-11-23 20:32:19,475 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:32:19,476 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:32:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:32:19,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 89. [2019-11-23 20:32:19,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-23 20:32:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2019-11-23 20:32:19,487 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 74 [2019-11-23 20:32:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:19,488 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2019-11-23 20:32:19,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:32:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2019-11-23 20:32:19,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:32:19,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:19,490 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:19,694 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:19,695 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:19,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:19,695 INFO L82 PathProgramCache]: Analyzing trace with hash 2045871673, now seen corresponding path program 14 times [2019-11-23 20:32:19,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:19,696 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645513153] [2019-11-23 20:32:19,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:19,998 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645513153] [2019-11-23 20:32:19,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314275862] [2019-11-23 20:32:19,999 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:20,116 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:32:20,117 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:20,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:32:20,121 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:20,141 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-11-23 20:32:20,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:20,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-11-23 20:32:20,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764812985] [2019-11-23 20:32:20,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:32:20,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:32:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:32:20,144 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 18 states. [2019-11-23 20:32:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:20,293 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2019-11-23 20:32:20,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:32:20,293 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2019-11-23 20:32:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:20,295 INFO L225 Difference]: With dead ends: 155 [2019-11-23 20:32:20,295 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:32:20,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:32:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:32:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-11-23 20:32:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-11-23 20:32:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2019-11-23 20:32:20,300 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 79 [2019-11-23 20:32:20,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:20,301 INFO L462 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2019-11-23 20:32:20,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:32:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2019-11-23 20:32:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2019-11-23 20:32:20,303 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:20,303 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:20,507 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:20,507 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:20,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:20,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1153085907, now seen corresponding path program 15 times [2019-11-23 20:32:20,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:20,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887577077] [2019-11-23 20:32:20,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:20,701 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-11-23 20:32:20,701 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887577077] [2019-11-23 20:32:20,702 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412308407] [2019-11-23 20:32:20,702 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:57,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 20:32:57,371 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:57,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:32:57,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2019-11-23 20:32:57,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:57,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:32:57,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707859774] [2019-11-23 20:32:57,431 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:32:57,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:32:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:32:57,432 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 19 states. [2019-11-23 20:32:57,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:57,598 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2019-11-23 20:32:57,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:32:57,599 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2019-11-23 20:32:57,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:57,600 INFO L225 Difference]: With dead ends: 163 [2019-11-23 20:32:57,600 INFO L226 Difference]: Without dead ends: 102 [2019-11-23 20:32:57,601 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:32:57,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-11-23 20:32:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2019-11-23 20:32:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-11-23 20:32:57,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2019-11-23 20:32:57,606 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 84 [2019-11-23 20:32:57,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:57,606 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2019-11-23 20:32:57,606 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:32:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2019-11-23 20:32:57,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-11-23 20:32:57,607 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:57,607 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:57,816 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:57,816 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1664974347, now seen corresponding path program 16 times [2019-11-23 20:32:57,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:57,818 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672882533] [2019-11-23 20:32:57,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:57,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672882533] [2019-11-23 20:32:57,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504249286] [2019-11-23 20:32:57,997 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:32:58,154 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:32:58,157 INFO L255 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-23 20:32:58,159 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:32:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2019-11-23 20:32:58,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:32:58,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-11-23 20:32:58,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744624863] [2019-11-23 20:32:58,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:32:58,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:32:58,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:32:58,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:32:58,188 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand 20 states. [2019-11-23 20:32:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:32:58,377 INFO L93 Difference]: Finished difference Result 171 states and 212 transitions. [2019-11-23 20:32:58,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:32:58,377 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2019-11-23 20:32:58,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:32:58,378 INFO L225 Difference]: With dead ends: 171 [2019-11-23 20:32:58,378 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:32:58,379 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:32:58,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:32:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2019-11-23 20:32:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-11-23 20:32:58,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2019-11-23 20:32:58,384 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 89 [2019-11-23 20:32:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:32:58,384 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2019-11-23 20:32:58,384 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:32:58,384 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2019-11-23 20:32:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-11-23 20:32:58,385 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:32:58,385 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:32:58,589 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:32:58,590 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:32:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:32:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash 619490929, now seen corresponding path program 17 times [2019-11-23 20:32:58,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:32:58,591 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59995587] [2019-11-23 20:32:58,591 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:32:58,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:32:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2019-11-23 20:32:58,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59995587] [2019-11-23 20:32:58,829 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26115889] [2019-11-23 20:32:58,829 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true