/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/array-cav19/array_init_pair_sum_const.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:01:06,050 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:01:06,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:01:06,087 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:01:06,087 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:01:06,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:01:06,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:01:06,093 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:01:06,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:01:06,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:01:06,097 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:01:06,099 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:01:06,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:01:06,100 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:01:06,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:01:06,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:01:06,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:01:06,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:01:06,107 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:01:06,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:01:06,111 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:01:06,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:01:06,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:01:06,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:01:06,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:01:06,147 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:01:06,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:01:06,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:01:06,155 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:01:06,204 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:01:06,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:01:06,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:01:06,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:01:06,208 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:01:06,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:01:06,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:01:06,209 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:01:06,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:01:06,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:01:06,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:01:06,210 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:01:06,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:01:06,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:01:06,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:01:06,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:01:06,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:01:06,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:01:06,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:01:06,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:01:06,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:01:06,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:01:06,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:01:06,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:01:06,214 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:01:06,214 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:01:06,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:01:06,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:01:06,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:01:06,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:01:06,692 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:01:06,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-01-06 11:01:06,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/72e783ea1/78f6ce7fd5424cafbbedfc3cc66c07ea/FLAGed08615c5 [2021-01-06 11:01:07,413 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:01:07,413 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c [2021-01-06 11:01:07,424 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/72e783ea1/78f6ce7fd5424cafbbedfc3cc66c07ea/FLAGed08615c5 [2021-01-06 11:01:07,744 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/72e783ea1/78f6ce7fd5424cafbbedfc3cc66c07ea [2021-01-06 11:01:07,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:01:07,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:01:07,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:01:07,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:01:07,759 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:01:07,761 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:01:07" (1/1) ... [2021-01-06 11:01:07,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bbc4bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:07, skipping insertion in model container [2021-01-06 11:01:07,764 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:01:07" (1/1) ... [2021-01-06 11:01:07,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:01:07,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:01:07,974 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~c~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:01:07,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:01:08,006 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:01:08,021 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_pair_sum_const.c[416,429] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#c~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#c~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 11:01:08,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:01:08,052 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:01:08,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08 WrapperNode [2021-01-06 11:01:08,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:01:08,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:01:08,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:01:08,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:01:08,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,076 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:01:08,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:01:08,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:01:08,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:01:08,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... [2021-01-06 11:01:08,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:01:08,135 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:01:08,136 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:01:08,136 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:01:08,137 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:08,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:01:08,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:01:08,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:01:08,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:01:08,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:01:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:01:08,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:01:08,744 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:01:08,745 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 11:01:08,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:01:08 BoogieIcfgContainer [2021-01-06 11:01:08,750 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:01:08,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:01:08,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:01:08,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:01:08,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:01:07" (1/3) ... [2021-01-06 11:01:08,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2770f3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:01:08, skipping insertion in model container [2021-01-06 11:01:08,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:01:08" (2/3) ... [2021-01-06 11:01:08,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2770f3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:01:08, skipping insertion in model container [2021-01-06 11:01:08,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:01:08" (3/3) ... [2021-01-06 11:01:08,771 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_pair_sum_const.c [2021-01-06 11:01:08,789 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:01:08,803 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:01:08,856 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:01:08,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:01:08,909 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:01:08,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:01:08,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:01:08,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:01:08,910 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:01:08,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:01:08,910 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:01:08,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-01-06 11:01:08,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 11:01:08,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:08,937 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:08,938 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:08,945 INFO L82 PathProgramCache]: Analyzing trace with hash -2016449835, now seen corresponding path program 1 times [2021-01-06 11:01:08,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:08,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721147318] [2021-01-06 11:01:08,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:09,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:01:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721147318] [2021-01-06 11:01:09,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:01:09,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:01:09,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603331504] [2021-01-06 11:01:09,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:01:09,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:01:09,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:01:09,243 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 3 states. [2021-01-06 11:01:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:09,330 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-01-06 11:01:09,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:01:09,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 11:01:09,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:09,341 INFO L225 Difference]: With dead ends: 34 [2021-01-06 11:01:09,342 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 11:01:09,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:01:09,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 11:01:09,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 11:01:09,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 11:01:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 11:01:09,390 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-01-06 11:01:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:09,391 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 11:01:09,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:01:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 11:01:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 11:01:09,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:09,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:09,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:01:09,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:09,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:09,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1564645395, now seen corresponding path program 1 times [2021-01-06 11:01:09,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:09,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420129394] [2021-01-06 11:01:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:09,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:01:09,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420129394] [2021-01-06 11:01:09,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:01:09,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 11:01:09,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840103100] [2021-01-06 11:01:09,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 11:01:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 11:01:09,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:01:09,545 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2021-01-06 11:01:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:09,601 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-01-06 11:01:09,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:01:09,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2021-01-06 11:01:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:09,603 INFO L225 Difference]: With dead ends: 25 [2021-01-06 11:01:09,603 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 11:01:09,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-01-06 11:01:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 11:01:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2021-01-06 11:01:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 11:01:09,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-01-06 11:01:09,610 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2021-01-06 11:01:09,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:09,610 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-01-06 11:01:09,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 11:01:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-01-06 11:01:09,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 11:01:09,611 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:09,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:09,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:01:09,612 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2031054225, now seen corresponding path program 1 times [2021-01-06 11:01:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:09,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116838197] [2021-01-06 11:01:09,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:01:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116838197] [2021-01-06 11:01:09,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501142428] [2021-01-06 11:01:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:09,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:01:09,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:01:09,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:09,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 11:01:09,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949302654] [2021-01-06 11:01:09,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:01:09,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:09,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:01:09,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:01:09,920 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2021-01-06 11:01:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:09,969 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-01-06 11:01:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 11:01:09,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2021-01-06 11:01:09,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:09,971 INFO L225 Difference]: With dead ends: 30 [2021-01-06 11:01:09,971 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 11:01:09,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:01:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 11:01:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 11:01:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 11:01:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 11:01:09,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2021-01-06 11:01:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:09,977 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 11:01:09,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:01:09,977 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 11:01:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:01:09,978 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:09,978 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:10,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 11:01:10,194 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:10,195 INFO L82 PathProgramCache]: Analyzing trace with hash -628241457, now seen corresponding path program 2 times [2021-01-06 11:01:10,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:10,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417327212] [2021-01-06 11:01:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:01:10,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417327212] [2021-01-06 11:01:10,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144481346] [2021-01-06 11:01:10,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:10,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:01:10,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:10,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:01:10,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:01:10,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:10,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 11:01:10,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277022514] [2021-01-06 11:01:10,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:01:10,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:10,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:01:10,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:01:10,537 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 8 states. [2021-01-06 11:01:10,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:10,631 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-01-06 11:01:10,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:01:10,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2021-01-06 11:01:10,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:10,632 INFO L225 Difference]: With dead ends: 32 [2021-01-06 11:01:10,633 INFO L226 Difference]: Without dead ends: 21 [2021-01-06 11:01:10,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:01:10,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-01-06 11:01:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-01-06 11:01:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 11:01:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-01-06 11:01:10,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2021-01-06 11:01:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:10,639 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-01-06 11:01:10,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:01:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-01-06 11:01:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:01:10,640 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:10,640 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:10,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:10,854 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:10,855 INFO L82 PathProgramCache]: Analyzing trace with hash -705850739, now seen corresponding path program 3 times [2021-01-06 11:01:10,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:10,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232233029] [2021-01-06 11:01:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:01:10,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232233029] [2021-01-06 11:01:10,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002064615] [2021-01-06 11:01:10,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:11,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 11:01:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:01:11,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:11,175 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 11:01:11,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:11,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 11:01:11,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487398652] [2021-01-06 11:01:11,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:01:11,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:11,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:01:11,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:01:11,178 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2021-01-06 11:01:11,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:11,339 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-01-06 11:01:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:01:11,340 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2021-01-06 11:01:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:11,341 INFO L225 Difference]: With dead ends: 59 [2021-01-06 11:01:11,342 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:01:11,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:01:11,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:01:11,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 28. [2021-01-06 11:01:11,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 11:01:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-01-06 11:01:11,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2021-01-06 11:01:11,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:11,350 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-01-06 11:01:11,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:01:11,350 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-01-06 11:01:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 11:01:11,351 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:11,351 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:11,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:11,564 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:11,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash -318070331, now seen corresponding path program 4 times [2021-01-06 11:01:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:11,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197668448] [2021-01-06 11:01:11,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:01:11,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197668448] [2021-01-06 11:01:11,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042506348] [2021-01-06 11:01:11,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:11,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:01:11,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:11,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:01:11,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:12,062 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:01:12,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:12,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-01-06 11:01:12,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649000342] [2021-01-06 11:01:12,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 11:01:12,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:12,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 11:01:12,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:01:12,065 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 12 states. [2021-01-06 11:01:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:12,164 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2021-01-06 11:01:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 11:01:12,165 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2021-01-06 11:01:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:12,166 INFO L225 Difference]: With dead ends: 48 [2021-01-06 11:01:12,166 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 11:01:12,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=72, Unknown=0, NotChecked=0, Total=132 [2021-01-06 11:01:12,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 11:01:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 11:01:12,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:01:12,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 11:01:12,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2021-01-06 11:01:12,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:12,175 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 11:01:12,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 11:01:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 11:01:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 11:01:12,177 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:12,177 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:12,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:12,392 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash -509111549, now seen corresponding path program 5 times [2021-01-06 11:01:12,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:12,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385419049] [2021-01-06 11:01:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:01:12,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385419049] [2021-01-06 11:01:12,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626271186] [2021-01-06 11:01:12,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:13,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:01:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:13,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:01:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 11:01:13,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:13,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-01-06 11:01:13,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131847722] [2021-01-06 11:01:13,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 11:01:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 11:01:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-01-06 11:01:13,188 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 14 states. [2021-01-06 11:01:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:13,336 INFO L93 Difference]: Finished difference Result 85 states and 91 transitions. [2021-01-06 11:01:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:01:13,337 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2021-01-06 11:01:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:13,339 INFO L225 Difference]: With dead ends: 85 [2021-01-06 11:01:13,339 INFO L226 Difference]: Without dead ends: 68 [2021-01-06 11:01:13,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:01:13,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-01-06 11:01:13,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 36. [2021-01-06 11:01:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 11:01:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 11:01:13,348 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 27 [2021-01-06 11:01:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:13,348 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 11:01:13,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 11:01:13,349 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 11:01:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 11:01:13,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:13,350 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:13,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 11:01:13,565 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -189699779, now seen corresponding path program 6 times [2021-01-06 11:01:13,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:13,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678099818] [2021-01-06 11:01:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:13,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 11:01:13,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678099818] [2021-01-06 11:01:13,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946151759] [2021-01-06 11:01:13,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:13,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 11:01:13,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:01:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:14,091 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 11:01:14,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:14,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-01-06 11:01:14,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628385327] [2021-01-06 11:01:14,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 11:01:14,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:14,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 11:01:14,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:01:14,096 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 17 states. [2021-01-06 11:01:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:14,247 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-01-06 11:01:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:01:14,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2021-01-06 11:01:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:14,249 INFO L225 Difference]: With dead ends: 99 [2021-01-06 11:01:14,249 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 11:01:14,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-01-06 11:01:14,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 11:01:14,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 40. [2021-01-06 11:01:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:01:14,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-01-06 11:01:14,257 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 33 [2021-01-06 11:01:14,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:14,258 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-01-06 11:01:14,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 11:01:14,258 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-01-06 11:01:14,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:01:14,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:14,259 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:14,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:14,473 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:14,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:14,474 INFO L82 PathProgramCache]: Analyzing trace with hash 760584185, now seen corresponding path program 7 times [2021-01-06 11:01:14,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:14,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795043735] [2021-01-06 11:01:14,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:01:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795043735] [2021-01-06 11:01:14,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360821636] [2021-01-06 11:01:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:14,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:14,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:01:14,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:14,858 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:01:14,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:14,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 11:01:14,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962816067] [2021-01-06 11:01:14,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:01:14,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:14,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:01:14,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:01:14,861 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 18 states. [2021-01-06 11:01:14,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:14,956 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2021-01-06 11:01:14,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:01:14,956 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2021-01-06 11:01:14,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:14,957 INFO L225 Difference]: With dead ends: 66 [2021-01-06 11:01:14,957 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 11:01:14,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:01:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 11:01:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 11:01:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 11:01:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 11:01:14,964 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2021-01-06 11:01:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:14,965 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 11:01:14,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:01:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 11:01:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 11:01:14,966 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:14,966 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:15,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:15,180 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:15,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:15,180 INFO L82 PathProgramCache]: Analyzing trace with hash 885824567, now seen corresponding path program 8 times [2021-01-06 11:01:15,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:15,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155547925] [2021-01-06 11:01:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:01:15,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155547925] [2021-01-06 11:01:15,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238098400] [2021-01-06 11:01:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:15,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:01:15,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:01:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:15,634 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:01:15,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:15,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 11:01:15,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869480454] [2021-01-06 11:01:15,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:01:15,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:15,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:01:15,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:01:15,637 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2021-01-06 11:01:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:15,751 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-01-06 11:01:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:01:15,752 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2021-01-06 11:01:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:15,753 INFO L225 Difference]: With dead ends: 68 [2021-01-06 11:01:15,753 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 11:01:15,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:01:15,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 11:01:15,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2021-01-06 11:01:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 11:01:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-01-06 11:01:15,760 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 39 [2021-01-06 11:01:15,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:15,760 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-01-06 11:01:15,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:01:15,760 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-01-06 11:01:15,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-01-06 11:01:15,761 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:15,762 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:15,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:01:15,976 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash 982747381, now seen corresponding path program 9 times [2021-01-06 11:01:15,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185529519] [2021-01-06 11:01:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 11:01:16,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185529519] [2021-01-06 11:01:16,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224003283] [2021-01-06 11:01:16,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 11:01:16,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 11:01:16,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:16,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:01:16,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 11:01:16,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:16,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-01-06 11:01:16,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832137128] [2021-01-06 11:01:16,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 11:01:16,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:16,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 11:01:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-01-06 11:01:16,791 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 21 states. [2021-01-06 11:01:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:17,010 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2021-01-06 11:01:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:01:17,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2021-01-06 11:01:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:17,012 INFO L225 Difference]: With dead ends: 131 [2021-01-06 11:01:17,012 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 11:01:17,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-01-06 11:01:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 11:01:17,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 52. [2021-01-06 11:01:17,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:01:17,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-01-06 11:01:17,021 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2021-01-06 11:01:17,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:17,021 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-01-06 11:01:17,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 11:01:17,021 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-01-06 11:01:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 11:01:17,022 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:17,023 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:17,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:17,236 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:17,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:17,237 INFO L82 PathProgramCache]: Analyzing trace with hash 407457837, now seen corresponding path program 10 times [2021-01-06 11:01:17,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:17,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085177850] [2021-01-06 11:01:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:17,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:01:17,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085177850] [2021-01-06 11:01:17,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763074797] [2021-01-06 11:01:17,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:18,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:01:18,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:18,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:01:18,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:01:19,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:19,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-01-06 11:01:19,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937516849] [2021-01-06 11:01:19,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 11:01:19,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:19,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 11:01:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:01:19,051 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 24 states. [2021-01-06 11:01:19,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:19,189 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-01-06 11:01:19,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:01:19,190 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 49 [2021-01-06 11:01:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:19,191 INFO L225 Difference]: With dead ends: 84 [2021-01-06 11:01:19,191 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 11:01:19,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=321, Unknown=0, NotChecked=0, Total=552 [2021-01-06 11:01:19,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 11:01:19,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 11:01:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 11:01:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 11:01:19,199 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 49 [2021-01-06 11:01:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:19,199 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 11:01:19,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 11:01:19,199 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 11:01:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 11:01:19,200 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:19,200 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:19,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:19,416 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:19,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:19,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1964369771, now seen corresponding path program 11 times [2021-01-06 11:01:19,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:19,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476314935] [2021-01-06 11:01:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:01:19,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476314935] [2021-01-06 11:01:19,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662282877] [2021-01-06 11:01:19,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:39,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:01:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:39,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:01:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:01:39,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:39,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-01-06 11:01:39,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039708975] [2021-01-06 11:01:39,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 11:01:39,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 11:01:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:01:39,850 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 26 states. [2021-01-06 11:01:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:39,959 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-01-06 11:01:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 11:01:39,959 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2021-01-06 11:01:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:39,960 INFO L225 Difference]: With dead ends: 86 [2021-01-06 11:01:39,960 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 11:01:39,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=380, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:01:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 11:01:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 11:01:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 11:01:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 11:01:39,968 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2021-01-06 11:01:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:39,968 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 11:01:39,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 11:01:39,968 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 11:01:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:01:39,969 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:39,969 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:40,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 11:01:40,183 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:40,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:40,184 INFO L82 PathProgramCache]: Analyzing trace with hash -786847959, now seen corresponding path program 12 times [2021-01-06 11:01:40,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:40,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125626589] [2021-01-06 11:01:40,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 11:01:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125626589] [2021-01-06 11:01:40,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340424138] [2021-01-06 11:01:40,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:42,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 11:01:42,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:01:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 11:01:42,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:42,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-01-06 11:01:42,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956701781] [2021-01-06 11:01:42,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:01:42,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:42,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:01:42,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=408, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:01:42,920 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 27 states. [2021-01-06 11:01:43,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:43,190 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2021-01-06 11:01:43,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:01:43,190 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 53 [2021-01-06 11:01:43,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:43,192 INFO L225 Difference]: With dead ends: 167 [2021-01-06 11:01:43,192 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 11:01:43,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:01:43,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 11:01:43,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 64. [2021-01-06 11:01:43,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 11:01:43,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 11:01:43,200 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2021-01-06 11:01:43,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:43,201 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 11:01:43,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:01:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 11:01:43,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 11:01:43,202 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:43,202 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:43,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 11:01:43,415 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1380005279, now seen corresponding path program 13 times [2021-01-06 11:01:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:43,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731844532] [2021-01-06 11:01:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:43,654 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:01:43,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731844532] [2021-01-06 11:01:43,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521519445] [2021-01-06 11:01:43,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:01:43,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:44,009 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:01:44,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:44,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-01-06 11:01:44,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641544496] [2021-01-06 11:01:44,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 11:01:44,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:44,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 11:01:44,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2021-01-06 11:01:44,013 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 30 states. [2021-01-06 11:01:44,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:44,182 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2021-01-06 11:01:44,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:01:44,182 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 61 [2021-01-06 11:01:44,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:44,183 INFO L225 Difference]: With dead ends: 102 [2021-01-06 11:01:44,184 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 11:01:44,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2021-01-06 11:01:44,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 11:01:44,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 11:01:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 11:01:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 11:01:44,191 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 61 [2021-01-06 11:01:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:44,191 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 11:01:44,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 11:01:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 11:01:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 11:01:44,192 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:44,192 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:44,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:01:44,406 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1159492767, now seen corresponding path program 14 times [2021-01-06 11:01:44,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:44,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574491879] [2021-01-06 11:01:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:01:44,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574491879] [2021-01-06 11:01:44,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442922336] [2021-01-06 11:01:44,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:44,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:01:44,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:44,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:01:44,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:01:45,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:45,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 11:01:45,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088639218] [2021-01-06 11:01:45,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 11:01:45,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:45,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 11:01:45,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:01:45,057 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 32 states. [2021-01-06 11:01:45,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:45,160 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2021-01-06 11:01:45,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:01:45,160 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 63 [2021-01-06 11:01:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:45,161 INFO L225 Difference]: With dead ends: 104 [2021-01-06 11:01:45,161 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 11:01:45,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=587, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:01:45,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 11:01:45,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 11:01:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 11:01:45,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 11:01:45,167 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2021-01-06 11:01:45,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:45,167 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 11:01:45,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 11:01:45,168 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 11:01:45,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-01-06 11:01:45,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:45,169 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:45,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:45,382 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:45,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:45,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2075690845, now seen corresponding path program 15 times [2021-01-06 11:01:45,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:45,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644890197] [2021-01-06 11:01:45,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 11:01:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644890197] [2021-01-06 11:01:45,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619381462] [2021-01-06 11:01:45,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:01:51,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-01-06 11:01:51,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:01:51,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:01:51,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:01:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 11:01:51,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:01:51,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 33 [2021-01-06 11:01:51,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813660258] [2021-01-06 11:01:51,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 11:01:51,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:01:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 11:01:51,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=621, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 11:01:51,742 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 33 states. [2021-01-06 11:01:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:01:52,124 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2021-01-06 11:01:52,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:01:52,125 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 65 [2021-01-06 11:01:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:01:52,126 INFO L225 Difference]: With dead ends: 203 [2021-01-06 11:01:52,127 INFO L226 Difference]: Without dead ends: 168 [2021-01-06 11:01:52,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 11:01:52,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-01-06 11:01:52,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 76. [2021-01-06 11:01:52,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 11:01:52,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2021-01-06 11:01:52,135 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 65 [2021-01-06 11:01:52,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:01:52,136 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2021-01-06 11:01:52,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 11:01:52,136 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2021-01-06 11:01:52,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-01-06 11:01:52,140 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:01:52,140 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:01:52,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:01:52,341 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:01:52,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:01:52,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1894840683, now seen corresponding path program 16 times [2021-01-06 11:01:52,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:01:52,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534296942] [2021-01-06 11:01:52,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:01:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:01:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 11:01:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534296942] [2021-01-06 11:01:52,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524267834] [2021-01-06 11:01:52,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:02:02,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:02:02,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:02:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:02:02,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:02:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 11:02:03,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:02:03,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-01-06 11:02:03,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010192935] [2021-01-06 11:02:03,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 11:02:03,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:02:03,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 11:02:03,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:02:03,289 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 36 states. [2021-01-06 11:02:03,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:02:03,502 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2021-01-06 11:02:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 11:02:03,503 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 73 [2021-01-06 11:02:03,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:02:03,504 INFO L225 Difference]: With dead ends: 120 [2021-01-06 11:02:03,504 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 11:02:03,505 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=510, Invalid=750, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:02:03,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 11:02:03,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 11:02:03,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 11:02:03,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-01-06 11:02:03,511 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 73 [2021-01-06 11:02:03,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:02:03,511 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-01-06 11:02:03,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 11:02:03,512 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-01-06 11:02:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 11:02:03,512 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:02:03,529 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:02:03,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 11:02:03,730 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:02:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:02:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -923188269, now seen corresponding path program 17 times [2021-01-06 11:02:03,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:02:03,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602911109] [2021-01-06 11:02:03,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:02:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:02:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 11:02:04,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602911109] [2021-01-06 11:02:04,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900002779] [2021-01-06 11:02:04,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true