/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive/Ackermann04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 06:58:07,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 06:58:07,071 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 06:58:07,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 06:58:07,164 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 06:58:07,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 06:58:07,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 06:58:07,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 06:58:07,185 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 06:58:07,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 06:58:07,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 06:58:07,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 06:58:07,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 06:58:07,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 06:58:07,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 06:58:07,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 06:58:07,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 06:58:07,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 06:58:07,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 06:58:07,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 06:58:07,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 06:58:07,299 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 06:58:07,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 06:58:07,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 06:58:07,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 06:58:07,305 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 06:58:07,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 06:58:07,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 06:58:07,306 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 06:58:07,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 06:58:07,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 06:58:07,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 06:58:07,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 06:58:07,309 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 06:58:07,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 06:58:07,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 06:58:07,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 06:58:07,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 06:58:07,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 06:58:07,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 06:58:07,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 06:58:07,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 06:58:07,311 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 06:58:07,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 06:58:07,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 06:58:07,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 06:58:07,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 06:58:07,789 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 06:58:07,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 06:58:07,845 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 06:58:07,847 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 06:58:07,848 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 06:58:07,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann04.c [2020-12-22 06:58:07,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9e6c0d6/3bab831b10c64c6ab29dc73fb9b8aac9/FLAG71668b443 [2020-12-22 06:58:08,569 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 06:58:08,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c [2020-12-22 06:58:08,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9e6c0d6/3bab831b10c64c6ab29dc73fb9b8aac9/FLAG71668b443 [2020-12-22 06:58:08,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca9e6c0d6/3bab831b10c64c6ab29dc73fb9b8aac9 [2020-12-22 06:58:08,931 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 06:58:08,933 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 06:58:08,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:08,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 06:58:08,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 06:58:08,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:08" (1/1) ... [2020-12-22 06:58:08,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f5e3814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:08, skipping insertion in model container [2020-12-22 06:58:08,948 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 06:58:08" (1/1) ... [2020-12-22 06:58:08,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 06:58:08,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 06:58:09,127 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2020-12-22 06:58:09,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:09,141 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 06:58:09,160 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2020-12-22 06:58:09,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 06:58:09,177 INFO L208 MainTranslator]: Completed translation [2020-12-22 06:58:09,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09 WrapperNode [2020-12-22 06:58:09,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 06:58:09,179 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:09,180 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 06:58:09,180 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 06:58:09,189 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,218 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 06:58:09,219 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 06:58:09,219 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 06:58:09,219 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 06:58:09,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,236 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (1/1) ... [2020-12-22 06:58:09,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 06:58:09,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 06:58:09,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 06:58:09,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 06:58:09,244 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (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 [2020-12-22 06:58:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 06:58:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 06:58:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-12-22 06:58:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-12-22 06:58:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 06:58:09,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 06:58:09,750 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 06:58:09,750 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 06:58:09,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:09 BoogieIcfgContainer [2020-12-22 06:58:09,752 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 06:58:09,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 06:58:09,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 06:58:09,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 06:58:09,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 06:58:08" (1/3) ... [2020-12-22 06:58:09,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a28a3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:09, skipping insertion in model container [2020-12-22 06:58:09,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 06:58:09" (2/3) ... [2020-12-22 06:58:09,772 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a28a3a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 06:58:09, skipping insertion in model container [2020-12-22 06:58:09,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:09" (3/3) ... [2020-12-22 06:58:09,775 INFO L111 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2020-12-22 06:58:09,791 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 06:58:09,813 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 06:58:09,858 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 06:58:09,897 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 06:58:09,897 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 06:58:09,897 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 06:58:09,897 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 06:58:09,897 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 06:58:09,898 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 06:58:09,898 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 06:58:09,898 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 06:58:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 06:58:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 06:58:09,928 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:09,929 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:09,929 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:09,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2020-12-22 06:58:09,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:09,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046132388] [2020-12-22 06:58:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 06:58:10,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046132388] [2020-12-22 06:58:10,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 06:58:10,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 06:58:10,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877462920] [2020-12-22 06:58:10,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 06:58:10,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 06:58:10,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 06:58:10,245 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2020-12-22 06:58:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:10,417 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-12-22 06:58:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:58:10,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-12-22 06:58:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:10,430 INFO L225 Difference]: With dead ends: 51 [2020-12-22 06:58:10,431 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 06:58:10,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 06:58:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 06:58:10,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-12-22 06:58:10,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-22 06:58:10,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2020-12-22 06:58:10,486 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2020-12-22 06:58:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:10,486 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2020-12-22 06:58:10,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 06:58:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2020-12-22 06:58:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 06:58:10,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:10,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:10,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 06:58:10,490 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:10,491 INFO L82 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2020-12-22 06:58:10,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:10,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735724120] [2020-12-22 06:58:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:10,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:10,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:10,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:10,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 06:58:10,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735724120] [2020-12-22 06:58:10,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884717100] [2020-12-22 06:58:10,612 INFO L95 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 [2020-12-22 06:58:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:10,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 06:58:10,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:10,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 06:58:10,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:10,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 06:58:10,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810680008] [2020-12-22 06:58:10,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:58:10,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:58:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:58:10,797 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 8 states. [2020-12-22 06:58:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:10,919 INFO L93 Difference]: Finished difference Result 49 states and 74 transitions. [2020-12-22 06:58:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 06:58:10,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-12-22 06:58:10,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:10,923 INFO L225 Difference]: With dead ends: 49 [2020-12-22 06:58:10,923 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 06:58:10,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:58:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 06:58:10,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 06:58:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 06:58:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2020-12-22 06:58:10,935 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 19 [2020-12-22 06:58:10,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:10,935 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2020-12-22 06:58:10,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:58:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2020-12-22 06:58:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-22 06:58:10,938 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:10,938 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:11,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 06:58:11,155 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:11,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:11,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1893657534, now seen corresponding path program 1 times [2020-12-22 06:58:11,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:11,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138488240] [2020-12-22 06:58:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:11,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:11,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:11,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:11,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 06:58:11,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138488240] [2020-12-22 06:58:11,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410226254] [2020-12-22 06:58:11,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 06:58:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:11,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 06:58:11,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 06:58:11,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:11,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-22 06:58:11,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549830779] [2020-12-22 06:58:11,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 06:58:11,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 06:58:11,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 06:58:11,622 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 8 states. [2020-12-22 06:58:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:11,838 INFO L93 Difference]: Finished difference Result 74 states and 134 transitions. [2020-12-22 06:58:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 06:58:11,839 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-12-22 06:58:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:11,849 INFO L225 Difference]: With dead ends: 74 [2020-12-22 06:58:11,849 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 06:58:11,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:58:11,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 06:58:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-22 06:58:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 06:58:11,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2020-12-22 06:58:11,890 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 32 [2020-12-22 06:58:11,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:11,894 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2020-12-22 06:58:11,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 06:58:11,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2020-12-22 06:58:11,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 06:58:11,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:11,902 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:12,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:12,104 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:12,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:12,105 INFO L82 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 2 times [2020-12-22 06:58:12,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:12,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779810722] [2020-12-22 06:58:12,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:12,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:12,355 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 06:58:12,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779810722] [2020-12-22 06:58:12,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336455997] [2020-12-22 06:58:12,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-22 06:58:12,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 06:58:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:12,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 06:58:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 06:58:12,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:12,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2020-12-22 06:58:12,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239920360] [2020-12-22 06:58:12,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 06:58:12,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:12,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 06:58:12,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-22 06:58:12,563 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand 9 states. [2020-12-22 06:58:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:12,752 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2020-12-22 06:58:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 06:58:12,753 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2020-12-22 06:58:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:12,755 INFO L225 Difference]: With dead ends: 120 [2020-12-22 06:58:12,756 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 06:58:12,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 06:58:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 06:58:12,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-12-22 06:58:12,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 06:58:12,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2020-12-22 06:58:12,771 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2020-12-22 06:58:12,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:12,771 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2020-12-22 06:58:12,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 06:58:12,772 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2020-12-22 06:58:12,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-12-22 06:58:12,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:12,775 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:12,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:12,991 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash -749766204, now seen corresponding path program 3 times [2020-12-22 06:58:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:12,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947426943] [2020-12-22 06:58:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:13,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-12-22 06:58:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 101 proven. 59 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-12-22 06:58:13,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947426943] [2020-12-22 06:58:13,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6444963] [2020-12-22 06:58:13,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-22 06:58:13,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 06:58:13,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:13,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 06:58:13,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 98 proven. 19 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-12-22 06:58:13,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:13,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 18 [2020-12-22 06:58:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306671278] [2020-12-22 06:58:13,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 06:58:13,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:13,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 06:58:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-12-22 06:58:13,707 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand 18 states. [2020-12-22 06:58:14,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:14,362 INFO L93 Difference]: Finished difference Result 119 states and 222 transitions. [2020-12-22 06:58:14,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 06:58:14,363 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-12-22 06:58:14,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:14,366 INFO L225 Difference]: With dead ends: 119 [2020-12-22 06:58:14,366 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 06:58:14,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 06:58:14,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 06:58:14,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-12-22 06:58:14,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 06:58:14,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2020-12-22 06:58:14,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 79 [2020-12-22 06:58:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:14,383 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2020-12-22 06:58:14,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 06:58:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2020-12-22 06:58:14,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 06:58:14,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:14,389 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:14,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:14,600 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:14,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:14,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1092184431, now seen corresponding path program 4 times [2020-12-22 06:58:14,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:14,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314944719] [2020-12-22 06:58:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:14,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:14,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-12-22 06:58:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-12-22 06:58:15,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 305 proven. 238 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2020-12-22 06:58:15,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314944719] [2020-12-22 06:58:15,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268316826] [2020-12-22 06:58:15,200 INFO L93 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 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 [2020-12-22 06:58:15,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 06:58:15,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:15,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 06:58:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:15,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1245 backedges. 268 proven. 468 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2020-12-22 06:58:15,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:15,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2020-12-22 06:58:15,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912792351] [2020-12-22 06:58:15,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 06:58:15,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:15,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 06:58:15,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:58:15,731 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 24 states. [2020-12-22 06:58:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:20,225 INFO L93 Difference]: Finished difference Result 183 states and 436 transitions. [2020-12-22 06:58:20,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 06:58:20,227 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 158 [2020-12-22 06:58:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:20,230 INFO L225 Difference]: With dead ends: 183 [2020-12-22 06:58:20,230 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 06:58:20,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1647, Invalid=8253, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 06:58:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 06:58:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2020-12-22 06:58:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 06:58:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 160 transitions. [2020-12-22 06:58:20,266 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 160 transitions. Word has length 158 [2020-12-22 06:58:20,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:20,266 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 160 transitions. [2020-12-22 06:58:20,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 06:58:20,266 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 160 transitions. [2020-12-22 06:58:20,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 06:58:20,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:20,269 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:20,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 06:58:20,484 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1294012555, now seen corresponding path program 5 times [2020-12-22 06:58:20,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:20,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755157210] [2020-12-22 06:58:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:20,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-12-22 06:58:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:20,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:21,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 158 proven. 354 refuted. 0 times theorem prover too weak. 518 trivial. 0 not checked. [2020-12-22 06:58:21,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755157210] [2020-12-22 06:58:21,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993463188] [2020-12-22 06:58:21,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-12-22 06:58:21,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 06:58:21,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:21,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 06:58:21,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2020-12-22 06:58:21,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:21,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-12-22 06:58:21,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951722809] [2020-12-22 06:58:21,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 06:58:21,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:21,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 06:58:21,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-12-22 06:58:21,426 INFO L87 Difference]: Start difference. First operand 100 states and 160 transitions. Second operand 18 states. [2020-12-22 06:58:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:22,110 INFO L93 Difference]: Finished difference Result 209 states and 364 transitions. [2020-12-22 06:58:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 06:58:22,110 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 144 [2020-12-22 06:58:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:22,113 INFO L225 Difference]: With dead ends: 209 [2020-12-22 06:58:22,113 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 06:58:22,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 06:58:22,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 06:58:22,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-12-22 06:58:22,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 06:58:22,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2020-12-22 06:58:22,138 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 144 [2020-12-22 06:58:22,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:22,139 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2020-12-22 06:58:22,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 06:58:22,139 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2020-12-22 06:58:22,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 06:58:22,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:22,142 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:22,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:22,356 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:22,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 6 times [2020-12-22 06:58:22,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:22,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224874863] [2020-12-22 06:58:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:22,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:22,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-12-22 06:58:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:22,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:22,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:22,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-12-22 06:58:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224874863] [2020-12-22 06:58:23,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097304903] [2020-12-22 06:58:23,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-12-22 06:58:23,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-12-22 06:58:23,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 06:58:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-12-22 06:58:23,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:23,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-12-22 06:58:23,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464875537] [2020-12-22 06:58:23,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 06:58:23,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 06:58:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-12-22 06:58:23,416 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand 24 states. [2020-12-22 06:58:24,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:24,585 INFO L93 Difference]: Finished difference Result 224 states and 399 transitions. [2020-12-22 06:58:24,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 06:58:24,586 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 157 [2020-12-22 06:58:24,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:24,590 INFO L225 Difference]: With dead ends: 224 [2020-12-22 06:58:24,590 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 06:58:24,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 06:58:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 06:58:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2020-12-22 06:58:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 06:58:24,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2020-12-22 06:58:24,618 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2020-12-22 06:58:24,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:24,619 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2020-12-22 06:58:24,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 06:58:24,619 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2020-12-22 06:58:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-22 06:58:24,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:24,622 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:24,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:24,836 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 7 times [2020-12-22 06:58:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727602590] [2020-12-22 06:58:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:24,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:24,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:25,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-12-22 06:58:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:25,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-12-22 06:58:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-12-22 06:58:25,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727602590] [2020-12-22 06:58:25,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178072906] [2020-12-22 06:58:25,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2020-12-22 06:58:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:25,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 06:58:25,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:25,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-12-22 06:58:25,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:25,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-12-22 06:58:25,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969795281] [2020-12-22 06:58:25,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 06:58:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:25,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 06:58:25,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-12-22 06:58:25,913 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand 25 states. [2020-12-22 06:58:27,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:27,319 INFO L93 Difference]: Finished difference Result 263 states and 497 transitions. [2020-12-22 06:58:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 06:58:27,320 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 170 [2020-12-22 06:58:27,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:27,324 INFO L225 Difference]: With dead ends: 263 [2020-12-22 06:58:27,325 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 06:58:27,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=670, Invalid=3236, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 06:58:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 06:58:27,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2020-12-22 06:58:27,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 06:58:27,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 218 transitions. [2020-12-22 06:58:27,357 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 218 transitions. Word has length 170 [2020-12-22 06:58:27,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:27,358 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 218 transitions. [2020-12-22 06:58:27,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 06:58:27,359 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 218 transitions. [2020-12-22 06:58:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-12-22 06:58:27,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 06:58:27,362 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 06:58:27,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 06:58:27,577 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 06:58:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 06:58:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 8 times [2020-12-22 06:58:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 06:58:27,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579948191] [2020-12-22 06:58:27,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 06:58:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-22 06:58:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-12-22 06:58:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-12-22 06:58:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:27,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-22 06:58:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 06:58:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-12-22 06:58:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-12-22 06:58:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-12-22 06:58:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-12-22 06:58:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 06:58:28,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-12-22 06:58:28,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579948191] [2020-12-22 06:58:28,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324745581] [2020-12-22 06:58:28,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-22 06:58:28,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 06:58:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 06:58:28,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 06:58:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 06:58:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-12-22 06:58:28,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 06:58:28,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 26 [2020-12-22 06:58:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476021427] [2020-12-22 06:58:28,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 06:58:28,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 06:58:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 06:58:28,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-12-22 06:58:28,746 INFO L87 Difference]: Start difference. First operand 130 states and 218 transitions. Second operand 26 states. [2020-12-22 06:58:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 06:58:29,949 INFO L93 Difference]: Finished difference Result 166 states and 274 transitions. [2020-12-22 06:58:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 06:58:29,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 183 [2020-12-22 06:58:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 06:58:29,951 INFO L225 Difference]: With dead ends: 166 [2020-12-22 06:58:29,951 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 06:58:29,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=527, Invalid=2443, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 06:58:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 06:58:29,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 06:58:29,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 06:58:29,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 06:58:29,956 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 183 [2020-12-22 06:58:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 06:58:29,956 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 06:58:29,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 06:58:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 06:58:29,956 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 06:58:30,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 06:58:30,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-22 06:58:30,517 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2020-12-22 06:58:30,813 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2020-12-22 06:58:31,848 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 80 [2020-12-22 06:58:33,640 WARN L197 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 125 DAG size of output: 48 [2020-12-22 06:58:33,746 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-22 06:58:33,747 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-22 06:58:33,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-22 06:58:33,747 INFO L189 CegarLoopUtils]: For program point L29(lines 29 33) no Hoare annotation was computed. [2020-12-22 06:58:33,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-22 06:58:33,747 INFO L192 CegarLoopUtils]: At program point L27(lines 27 47) the Hoare annotation is: true [2020-12-22 06:58:33,747 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2020-12-22 06:58:33,748 INFO L189 CegarLoopUtils]: For program point L45(line 45) no Hoare annotation was computed. [2020-12-22 06:58:33,748 INFO L189 CegarLoopUtils]: For program point L42(lines 42 46) no Hoare annotation was computed. [2020-12-22 06:58:33,748 INFO L192 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: true [2020-12-22 06:58:33,748 INFO L189 CegarLoopUtils]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-12-22 06:58:33,748 INFO L189 CegarLoopUtils]: For program point L35(lines 35 40) no Hoare annotation was computed. [2020-12-22 06:58:33,748 INFO L189 CegarLoopUtils]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2020-12-22 06:58:33,748 INFO L185 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (or (not (<= |ackermann_#in~m| 0)) (not (<= 0 |ackermann_#in~m|)) (not (<= |ackermann_#in~n| 1)))) [2020-12-22 06:58:33,749 INFO L189 CegarLoopUtils]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-12-22 06:58:33,749 INFO L192 CegarLoopUtils]: At program point ackermannENTRY(lines 16 24) the Hoare annotation is: true [2020-12-22 06:58:33,749 INFO L185 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|)) [2020-12-22 06:58:33,749 INFO L185 CegarLoopUtils]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (= |ackermann_#in~m| 0)) (.cse3 (<= |ackermann_#in~n| 2)) (.cse6 (<= 3 |ackermann_#t~ret8|)) (.cse4 (<= 5 |ackermann_#t~ret8|)) (.cse7 (<= 6 |ackermann_#t~ret8|)) (.cse8 (not (<= 1 |ackermann_#in~m|)))) (and (or (not (<= |ackermann_#in~m| 0)) (and (= ackermann_~m |ackermann_#in~m|) .cse0 .cse1)) (let ((.cse2 (<= |ackermann_#in~m| ackermann_~m)) (.cse5 (<= ackermann_~m |ackermann_#in~m|))) (or (and (<= 2 |ackermann_#t~ret8|) (<= ackermann_~m 1) .cse0 .cse2) (and (<= |ackermann_#in~m| 2) .cse3 .cse2 .cse4 .cse0 .cse5) (and (<= |ackermann_#in~n| 1) .cse6 .cse0 .cse2 .cse5) (and .cse7 .cse2 .cse0 .cse5) .cse8)) (or (not (<= |ackermann_#in~n| 0)) .cse1) (or (= |ackermann_#in~n| 1) (and .cse3 .cse6) (and .cse4 (<= |ackermann_#in~n| 4)) .cse7 (and (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret8|)) .cse8))) [2020-12-22 06:58:33,750 INFO L189 CegarLoopUtils]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-12-22 06:58:33,750 INFO L189 CegarLoopUtils]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-12-22 06:58:33,750 INFO L189 CegarLoopUtils]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-12-22 06:58:33,750 INFO L189 CegarLoopUtils]: For program point L17(lines 17 19) no Hoare annotation was computed. [2020-12-22 06:58:33,750 INFO L189 CegarLoopUtils]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2020-12-22 06:58:33,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 06:58:33 BoogieIcfgContainer [2020-12-22 06:58:33,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 06:58:33,762 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 06:58:33,762 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 06:58:33,762 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 06:58:33,763 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 06:58:09" (3/4) ... [2020-12-22 06:58:33,766 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 06:58:33,774 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2020-12-22 06:58:33,779 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-12-22 06:58:33,779 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-22 06:58:33,780 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 06:58:33,780 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 06:58:33,824 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive/Ackermann04.c-witness.graphml [2020-12-22 06:58:33,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 06:58:33,826 INFO L168 Benchmark]: Toolchain (without parser) took 24892.27 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 131.4 MB in the beginning and 344.0 MB in the end (delta: -212.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,826 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 06:58:33,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.72 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.69 ms. Allocated memory is still 155.2 MB. Free memory was 121.5 MB in the beginning and 120.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,828 INFO L168 Benchmark]: Boogie Preprocessor took 23.22 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 119.1 MB in the end (delta: 936.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,828 INFO L168 Benchmark]: RCFGBuilder took 508.88 ms. Allocated memory is still 155.2 MB. Free memory was 119.1 MB in the beginning and 106.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,829 INFO L168 Benchmark]: TraceAbstraction took 24004.56 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 105.8 MB in the beginning and 346.7 MB in the end (delta: -240.9 MB). Peak memory consumption was 201.8 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,830 INFO L168 Benchmark]: Witness Printer took 62.50 ms. Allocated memory is still 389.0 MB. Free memory was 346.7 MB in the beginning and 344.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 06:58:33,833 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 155.2 MB. Free memory is still 126.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 240.72 ms. Allocated memory is still 155.2 MB. Free memory was 131.1 MB in the beginning and 121.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 38.69 ms. Allocated memory is still 155.2 MB. Free memory was 121.5 MB in the beginning and 120.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.22 ms. Allocated memory is still 155.2 MB. Free memory was 120.1 MB in the beginning and 119.1 MB in the end (delta: 936.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 508.88 ms. Allocated memory is still 155.2 MB. Free memory was 119.1 MB in the beginning and 106.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 24004.56 ms. Allocated memory was 155.2 MB in the beginning and 389.0 MB in the end (delta: 233.8 MB). Free memory was 105.8 MB in the beginning and 346.7 MB in the end (delta: -240.9 MB). Peak memory consumption was 201.8 MB. Max. memory is 8.0 GB. * Witness Printer took 62.50 ms. Allocated memory is still 389.0 MB. Free memory was 346.7 MB in the beginning and 344.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 20.2s, OverallIterations: 10, TraceHistogramMax: 27, AutomataDifference: 10.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 248 SDtfs, 416 SDslu, 1210 SDs, 0 SdLazy, 4189 SolverSat, 1335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1650 GetRequests, 1279 SyntacticMatches, 0 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5492 ImplicationChecksByTransitivity, 7.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=130occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 98 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 534 PreInvPairs, 1300 NumberOfFragments, 155 HoareAnnotationTreeSize, 534 FomulaSimplifications, 194754 FormulaSimplificationTreeSizeReduction, 2.2s HoareSimplificationTime, 6 FomulaSimplificationsInter, 4122 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 6.0s InterpolantComputationTime, 1986 NumberOfCodeBlocks, 1878 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1967 ConstructedInterpolants, 0 QuantifiedInterpolants, 515331 SizeOfPredicates, 65 NumberOfNonLiveVariables, 2787 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 11448/14212 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...