/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-lopstr16/flag_loopdep_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:05:38,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:05:38,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:05:38,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 11:05:38,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:05:38,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:05:38,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:05:38,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:05:38,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:05:38,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:05:38,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:05:38,157 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:05:38,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:05:38,165 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:05:38,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:05:38,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:05:38,179 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:05:38,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:05:38,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:05:38,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:05:38,213 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 11:05:38,274 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:05:38,274 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:05:38,276 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:05:38,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:05:38,277 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:05:38,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:05:38,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:05:38,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:05:38,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:05:38,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:05:38,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:05:38,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:05:38,279 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:05:38,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:05:38,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:05:38,280 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:05:38,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:05:38,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:05:38,281 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:05:38,281 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:05:38,281 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:05:38,281 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:05:38,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:05:38,282 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:05:38,282 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:05:38,282 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:05:38,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:05:38,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:05:38,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:05:38,843 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:05:38,844 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:05:38,845 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-01-06 11:05:38,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15f46baf4/f1433bc5c66c4e4791f870723728088f/FLAG627e68c0e [2021-01-06 11:05:39,763 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:05:39,765 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2021-01-06 11:05:39,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15f46baf4/f1433bc5c66c4e4791f870723728088f/FLAG627e68c0e [2021-01-06 11:05:40,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/15f46baf4/f1433bc5c66c4e4791f870723728088f [2021-01-06 11:05:40,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:05:40,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:05:40,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:40,082 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:05:40,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:05:40,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@369cfe10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40, skipping insertion in model container [2021-01-06 11:05:40,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:05:40,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 11:05:40,298 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-lopstr16/flag_loopdep_simple.i[812,825] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2021-01-06 11:05:40,327 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:40,339 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 11:05:40,356 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-lopstr16/flag_loopdep_simple.i[812,825] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~a,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~a,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] left hand side expression in assignment: lhs: VariableLHS[~flag~0,] left hand side expression in assignment: lhs: VariableLHS[~i~1,] [2021-01-06 11:05:40,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:05:40,387 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:05:40,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40 WrapperNode [2021-01-06 11:05:40,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:05:40,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:40,390 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:05:40,390 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:05:40,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,438 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:05:40,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:05:40,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:05:40,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:05:40,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,459 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,467 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (1/1) ... [2021-01-06 11:05:40,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:05:40,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:05:40,472 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:05:40,472 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:05:40,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (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 11:05:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:05:40,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:05:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 11:05:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:05:40,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:05:40,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 11:05:40,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 11:05:40,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:05:40,958 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-01-06 11:05:40,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:40 BoogieIcfgContainer [2021-01-06 11:05:40,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:05:41,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:05:41,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:05:41,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:05:41,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:05:40" (1/3) ... [2021-01-06 11:05:41,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f374c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:41, skipping insertion in model container [2021-01-06 11:05:41,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:05:40" (2/3) ... [2021-01-06 11:05:41,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f374c72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:05:41, skipping insertion in model container [2021-01-06 11:05:41,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:05:40" (3/3) ... [2021-01-06 11:05:41,030 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2021-01-06 11:05:41,050 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:05:41,084 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:05:41,130 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:05:41,163 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:05:41,163 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:05:41,163 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:05:41,164 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:05:41,164 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:05:41,164 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:05:41,164 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:05:41,164 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:05:41,181 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2021-01-06 11:05:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 11:05:41,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:41,189 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:41,189 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:41,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:41,197 INFO L82 PathProgramCache]: Analyzing trace with hash -2060710478, now seen corresponding path program 1 times [2021-01-06 11:05:41,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:41,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78064822] [2021-01-06 11:05:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:41,399 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 11:05:41,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78064822] [2021-01-06 11:05:41,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:41,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 11:05:41,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367303717] [2021-01-06 11:05:41,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 11:05:41,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:41,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 11:05:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:05:41,433 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2021-01-06 11:05:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:41,457 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2021-01-06 11:05:41,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 11:05:41,459 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2021-01-06 11:05:41,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:41,470 INFO L225 Difference]: With dead ends: 36 [2021-01-06 11:05:41,470 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 11:05:41,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 11:05:41,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 11:05:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 11:05:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 11:05:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2021-01-06 11:05:41,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 10 [2021-01-06 11:05:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:41,521 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2021-01-06 11:05:41,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 11:05:41,521 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2021-01-06 11:05:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 11:05:41,522 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:41,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:41,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:05:41,523 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:41,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1919336157, now seen corresponding path program 1 times [2021-01-06 11:05:41,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:41,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285986407] [2021-01-06 11:05:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:41,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:41,656 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 11:05:41,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285986407] [2021-01-06 11:05:41,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:41,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:41,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173475218] [2021-01-06 11:05:41,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:41,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:41,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:41,665 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand 3 states. [2021-01-06 11:05:41,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:41,715 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2021-01-06 11:05:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:41,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 11:05:41,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:41,719 INFO L225 Difference]: With dead ends: 30 [2021-01-06 11:05:41,719 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 11:05:41,721 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 11:05:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 11:05:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 11:05:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 11:05:41,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-01-06 11:05:41,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-01-06 11:05:41,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:41,737 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-01-06 11:05:41,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-01-06 11:05:41,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 11:05:41,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:41,741 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:41,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:05:41,743 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1264138591, now seen corresponding path program 1 times [2021-01-06 11:05:41,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:41,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138153420] [2021-01-06 11:05:41,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:41,840 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 11:05:41,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138153420] [2021-01-06 11:05:41,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:41,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:41,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359999279] [2021-01-06 11:05:41,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:41,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:41,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:41,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:41,845 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2021-01-06 11:05:41,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:41,894 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-01-06 11:05:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:41,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2021-01-06 11:05:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:41,896 INFO L225 Difference]: With dead ends: 35 [2021-01-06 11:05:41,897 INFO L226 Difference]: Without dead ends: 27 [2021-01-06 11:05:41,898 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 11:05:41,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-01-06 11:05:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2021-01-06 11:05:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 11:05:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-01-06 11:05:41,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 12 [2021-01-06 11:05:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:41,904 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-01-06 11:05:41,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-01-06 11:05:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:05:41,905 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:41,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:41,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:05:41,906 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1458340319, now seen corresponding path program 1 times [2021-01-06 11:05:41,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:41,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422711148] [2021-01-06 11:05:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:41,976 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 11:05:41,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422711148] [2021-01-06 11:05:41,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187929721] [2021-01-06 11:05:41,977 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 11:05:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 11:05:42,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 11:05:42,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 11:05:42,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 11:05:42,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048586310] [2021-01-06 11:05:42,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:42,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:05:42,168 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand 3 states. [2021-01-06 11:05:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:42,188 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2021-01-06 11:05:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:42,189 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 11:05:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:42,190 INFO L225 Difference]: With dead ends: 32 [2021-01-06 11:05:42,191 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 11:05:42,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 11:05:42,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 11:05:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-01-06 11:05:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 11:05:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-01-06 11:05:42,196 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 15 [2021-01-06 11:05:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:42,197 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-01-06 11:05:42,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-01-06 11:05:42,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:05:42,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:42,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:42,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:42,414 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash 2027280351, now seen corresponding path program 1 times [2021-01-06 11:05:42,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:42,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066504148] [2021-01-06 11:05:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,498 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 11:05:42,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066504148] [2021-01-06 11:05:42,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294936947] [2021-01-06 11:05:42,500 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 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 11:05:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:05:42,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:42,768 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 11:05:42,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:42,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 11:05:42,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132319506] [2021-01-06 11:05:42,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 11:05:42,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:42,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 11:05:42,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:05:42,776 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 6 states. [2021-01-06 11:05:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:42,894 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2021-01-06 11:05:42,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 11:05:42,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 11:05:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:42,902 INFO L225 Difference]: With dead ends: 53 [2021-01-06 11:05:42,902 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 11:05:42,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 11:05:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 11:05:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-01-06 11:05:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-01-06 11:05:42,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-01-06 11:05:42,919 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2021-01-06 11:05:42,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:42,920 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-01-06 11:05:42,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 11:05:42,920 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-01-06 11:05:42,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:05:42,921 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:42,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:43,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:43,136 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:43,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:43,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2139127327, now seen corresponding path program 2 times [2021-01-06 11:05:43,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:43,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443758892] [2021-01-06 11:05:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 11:05:43,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443758892] [2021-01-06 11:05:43,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470086867] [2021-01-06 11:05:43,283 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 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 11:05:43,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:43,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:43,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:05:43,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 11:05:43,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:43,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 11:05:43,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248552282] [2021-01-06 11:05:43,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 11:05:43,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 11:05:43,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:05:43,468 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 8 states. [2021-01-06 11:05:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:43,495 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-01-06 11:05:43,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 11:05:43,496 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2021-01-06 11:05:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:43,496 INFO L225 Difference]: With dead ends: 42 [2021-01-06 11:05:43,497 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 11:05:43,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-01-06 11:05:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 11:05:43,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 11:05:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 11:05:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-01-06 11:05:43,502 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-01-06 11:05:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:43,502 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-01-06 11:05:43,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 11:05:43,503 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-01-06 11:05:43,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 11:05:43,504 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:43,504 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:43,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:43,719 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:43,720 INFO L82 PathProgramCache]: Analyzing trace with hash -331071005, now seen corresponding path program 3 times [2021-01-06 11:05:43,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:43,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635904781] [2021-01-06 11:05:43,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-01-06 11:05:43,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635904781] [2021-01-06 11:05:43,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784788579] [2021-01-06 11:05:43,797 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 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 11:05:43,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 11:05:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:43,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 11:05:43,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:43,934 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 11:05:43,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:43,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-01-06 11:05:43,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388759802] [2021-01-06 11:05:43,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 11:05:43,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:43,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 11:05:43,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:05:43,937 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 9 states. [2021-01-06 11:05:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:44,011 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2021-01-06 11:05:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 11:05:44,012 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2021-01-06 11:05:44,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:44,013 INFO L225 Difference]: With dead ends: 70 [2021-01-06 11:05:44,013 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:05:44,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-01-06 11:05:44,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:05:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 30. [2021-01-06 11:05:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 11:05:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-01-06 11:05:44,020 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2021-01-06 11:05:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:44,021 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-01-06 11:05:44,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 11:05:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-01-06 11:05:44,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 11:05:44,022 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:44,022 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:44,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:44,237 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:44,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:44,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1534672359, now seen corresponding path program 4 times [2021-01-06 11:05:44,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:44,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863568294] [2021-01-06 11:05:44,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-01-06 11:05:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863568294] [2021-01-06 11:05:44,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493803141] [2021-01-06 11:05:44,385 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 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 11:05:44,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:44,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 11:05:44,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 11:05:44,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:44,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 11:05:44,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369275128] [2021-01-06 11:05:44,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 11:05:44,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:44,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 11:05:44,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:05:44,536 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 11 states. [2021-01-06 11:05:44,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:44,660 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2021-01-06 11:05:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:05:44,661 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2021-01-06 11:05:44,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:44,662 INFO L225 Difference]: With dead ends: 85 [2021-01-06 11:05:44,662 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 11:05:44,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 11:05:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 11:05:44,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 35. [2021-01-06 11:05:44,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 11:05:44,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2021-01-06 11:05:44,670 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 27 [2021-01-06 11:05:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:44,671 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2021-01-06 11:05:44,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 11:05:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2021-01-06 11:05:44,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-01-06 11:05:44,672 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:44,672 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:44,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:44,888 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:44,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1766720103, now seen corresponding path program 5 times [2021-01-06 11:05:44,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:44,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428712758] [2021-01-06 11:05:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-01-06 11:05:45,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428712758] [2021-01-06 11:05:45,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471531039] [2021-01-06 11:05:45,075 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 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 11:05:45,146 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 11:05:45,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:45,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 11:05:45,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:45,285 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 11:05:45,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:45,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-01-06 11:05:45,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443856260] [2021-01-06 11:05:45,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 11:05:45,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:45,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 11:05:45,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:05:45,288 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 13 states. [2021-01-06 11:05:45,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:45,417 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2021-01-06 11:05:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 11:05:45,418 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2021-01-06 11:05:45,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:45,419 INFO L225 Difference]: With dead ends: 100 [2021-01-06 11:05:45,419 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 11:05:45,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-01-06 11:05:45,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 11:05:45,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 40. [2021-01-06 11:05:45,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 11:05:45,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-01-06 11:05:45,426 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 32 [2021-01-06 11:05:45,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:45,426 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-01-06 11:05:45,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 11:05:45,426 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-01-06 11:05:45,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 11:05:45,427 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:45,427 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:45,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:45,643 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:45,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:45,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1089794667, now seen corresponding path program 6 times [2021-01-06 11:05:45,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:45,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773708859] [2021-01-06 11:05:45,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-01-06 11:05:45,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773708859] [2021-01-06 11:05:45,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975244836] [2021-01-06 11:05:45,808 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 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 11:05:45,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 11:05:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:45,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:05:45,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-01-06 11:05:46,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:46,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-01-06 11:05:46,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512986837] [2021-01-06 11:05:46,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 11:05:46,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:46,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 11:05:46,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-01-06 11:05:46,043 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 15 states. [2021-01-06 11:05:46,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:46,393 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-01-06 11:05:46,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:05:46,393 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2021-01-06 11:05:46,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:46,394 INFO L225 Difference]: With dead ends: 77 [2021-01-06 11:05:46,394 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 11:05:46,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2021-01-06 11:05:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 11:05:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2021-01-06 11:05:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:05:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2021-01-06 11:05:46,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2021-01-06 11:05:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:46,402 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2021-01-06 11:05:46,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 11:05:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2021-01-06 11:05:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 11:05:46,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:46,404 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:46,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 11:05:46,619 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:46,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1351978204, now seen corresponding path program 1 times [2021-01-06 11:05:46,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:46,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464158559] [2021-01-06 11:05:46,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:46,672 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 11:05:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464158559] [2021-01-06 11:05:46,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:05:46,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:05:46,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525929276] [2021-01-06 11:05:46,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:05:46,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:46,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:05:46,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:05:46,676 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 3 states. [2021-01-06 11:05:46,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:46,680 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-01-06 11:05:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:05:46,681 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-01-06 11:05:46,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:46,682 INFO L225 Difference]: With dead ends: 52 [2021-01-06 11:05:46,683 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 11:05:46,683 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 11:05:46,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 11:05:46,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-01-06 11:05:46,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 11:05:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 11:05:46,690 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2021-01-06 11:05:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:46,690 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 11:05:46,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:05:46,691 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 11:05:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 11:05:46,692 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:46,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:46,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 11:05:46,693 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:46,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:46,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2040020590, now seen corresponding path program 1 times [2021-01-06 11:05:46,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:46,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751193369] [2021-01-06 11:05:46,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 11:05:46,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751193369] [2021-01-06 11:05:46,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966577740] [2021-01-06 11:05:46,857 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 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 11:05:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:46,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:05:46,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 11:05:47,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:47,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-01-06 11:05:47,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458167290] [2021-01-06 11:05:47,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:05:47,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:47,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:05:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:47,207 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 18 states. [2021-01-06 11:05:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:47,250 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-01-06 11:05:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 11:05:47,251 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2021-01-06 11:05:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:47,251 INFO L225 Difference]: With dead ends: 76 [2021-01-06 11:05:47,252 INFO L226 Difference]: Without dead ends: 48 [2021-01-06 11:05:47,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-01-06 11:05:47,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-01-06 11:05:47,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 11:05:47,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2021-01-06 11:05:47,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 44 [2021-01-06 11:05:47,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:47,259 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2021-01-06 11:05:47,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:05:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2021-01-06 11:05:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-01-06 11:05:47,260 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:47,260 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:47,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 11:05:47,475 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:47,476 INFO L82 PathProgramCache]: Analyzing trace with hash 461215856, now seen corresponding path program 2 times [2021-01-06 11:05:47,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:47,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253217697] [2021-01-06 11:05:47,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:47,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 11:05:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253217697] [2021-01-06 11:05:47,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394891281] [2021-01-06 11:05:47,621 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 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 11:05:47,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:47,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:47,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:05:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 11:05:47,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:47,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-01-06 11:05:47,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482402967] [2021-01-06 11:05:47,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:05:47,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:47,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:05:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:47,969 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 20 states. [2021-01-06 11:05:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:48,021 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2021-01-06 11:05:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 11:05:48,024 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2021-01-06 11:05:48,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:48,024 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:05:48,025 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 11:05:48,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 11:05:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-01-06 11:05:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 11:05:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-01-06 11:05:48,032 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2021-01-06 11:05:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:48,032 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-01-06 11:05:48,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:05:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-01-06 11:05:48,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 11:05:48,033 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:48,034 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:48,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:48,248 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash -646678030, now seen corresponding path program 3 times [2021-01-06 11:05:48,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:48,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214039733] [2021-01-06 11:05:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:48,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 11:05:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214039733] [2021-01-06 11:05:48,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023525661] [2021-01-06 11:05:48,537 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 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 11:05:48,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 11:05:48,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 11:05:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-01-06 11:05:48,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:48,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 11:05:48,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089826004] [2021-01-06 11:05:48,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 11:05:48,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:48,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 11:05:48,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:48,778 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 18 states. [2021-01-06 11:05:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:48,922 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-01-06 11:05:48,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 11:05:48,923 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2021-01-06 11:05:48,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:48,923 INFO L225 Difference]: With dead ends: 122 [2021-01-06 11:05:48,924 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 11:05:48,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-01-06 11:05:48,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 11:05:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 54. [2021-01-06 11:05:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 11:05:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 11:05:48,932 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2021-01-06 11:05:48,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:48,933 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 11:05:48,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 11:05:48,933 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 11:05:48,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-01-06 11:05:48,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:48,934 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:49,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:49,147 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:49,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:49,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1330435568, now seen corresponding path program 4 times [2021-01-06 11:05:49,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:49,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106115202] [2021-01-06 11:05:49,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-01-06 11:05:49,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106115202] [2021-01-06 11:05:49,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309432043] [2021-01-06 11:05:49,329 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 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 11:05:49,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:49,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:49,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 11:05:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 11:05:49,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:49,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2021-01-06 11:05:49,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869691116] [2021-01-06 11:05:49,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 11:05:49,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 11:05:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:49,600 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 20 states. [2021-01-06 11:05:49,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:49,765 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2021-01-06 11:05:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 11:05:49,766 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 53 [2021-01-06 11:05:49,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:49,767 INFO L225 Difference]: With dead ends: 137 [2021-01-06 11:05:49,767 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 11:05:49,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-01-06 11:05:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 11:05:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 59. [2021-01-06 11:05:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 11:05:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-01-06 11:05:49,798 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 53 [2021-01-06 11:05:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:49,798 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-01-06 11:05:49,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 11:05:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-01-06 11:05:49,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 11:05:49,802 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:49,802 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:50,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 11:05:50,003 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:50,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:50,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2088027254, now seen corresponding path program 5 times [2021-01-06 11:05:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:50,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268885626] [2021-01-06 11:05:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 11:05:50,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268885626] [2021-01-06 11:05:50,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668963472] [2021-01-06 11:05:50,231 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 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 11:05:50,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 11:05:50,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:50,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 11:05:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-01-06 11:05:50,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:50,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-01-06 11:05:50,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418607360] [2021-01-06 11:05:50,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 11:05:50,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 11:05:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:05:50,636 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 22 states. [2021-01-06 11:05:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:50,826 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2021-01-06 11:05:50,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:05:50,826 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2021-01-06 11:05:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:50,827 INFO L225 Difference]: With dead ends: 152 [2021-01-06 11:05:50,827 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 11:05:50,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=327, Unknown=0, NotChecked=0, Total=462 [2021-01-06 11:05:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 11:05:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2021-01-06 11:05:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 11:05:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2021-01-06 11:05:50,834 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2021-01-06 11:05:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:50,834 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2021-01-06 11:05:50,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 11:05:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2021-01-06 11:05:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 11:05:50,835 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:50,836 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:51,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 11:05:51,050 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:51,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1964209268, now seen corresponding path program 6 times [2021-01-06 11:05:51,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:51,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453779729] [2021-01-06 11:05:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2021-01-06 11:05:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453779729] [2021-01-06 11:05:51,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239373967] [2021-01-06 11:05:51,298 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 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 11:05:51,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 11:05:51,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:51,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 11:05:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2021-01-06 11:05:51,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:51,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2021-01-06 11:05:51,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713273894] [2021-01-06 11:05:51,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 11:05:51,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:51,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 11:05:51,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2021-01-06 11:05:51,862 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand 26 states. [2021-01-06 11:05:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:52,506 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-01-06 11:05:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:05:52,507 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 63 [2021-01-06 11:05:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:52,508 INFO L225 Difference]: With dead ends: 113 [2021-01-06 11:05:52,508 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 11:05:52,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=375, Invalid=1347, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 11:05:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 11:05:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2021-01-06 11:05:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 11:05:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-01-06 11:05:52,515 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 63 [2021-01-06 11:05:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:52,516 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-01-06 11:05:52,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 11:05:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-01-06 11:05:52,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-01-06 11:05:52,517 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:52,518 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:52,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 11:05:52,732 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:52,733 INFO L82 PathProgramCache]: Analyzing trace with hash 601482327, now seen corresponding path program 7 times [2021-01-06 11:05:52,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:52,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694649140] [2021-01-06 11:05:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:52,997 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 11:05:52,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694649140] [2021-01-06 11:05:53,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957069184] [2021-01-06 11:05:53,007 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 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 11:05:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:53,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:05:53,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 11:05:53,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:53,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-01-06 11:05:53,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627435540] [2021-01-06 11:05:53,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 11:05:53,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 11:05:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2021-01-06 11:05:53,592 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 30 states. [2021-01-06 11:05:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:53,673 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2021-01-06 11:05:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 11:05:53,679 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 70 [2021-01-06 11:05:53,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:53,679 INFO L225 Difference]: With dead ends: 116 [2021-01-06 11:05:53,680 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 11:05:53,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=344, Invalid=526, Unknown=0, NotChecked=0, Total=870 [2021-01-06 11:05:53,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 11:05:53,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-01-06 11:05:53,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 11:05:53,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2021-01-06 11:05:53,689 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 70 [2021-01-06 11:05:53,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:53,690 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2021-01-06 11:05:53,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 11:05:53,690 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2021-01-06 11:05:53,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 11:05:53,691 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:53,691 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:53,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:53,906 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1946476505, now seen corresponding path program 8 times [2021-01-06 11:05:53,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:53,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817210492] [2021-01-06 11:05:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 11:05:54,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817210492] [2021-01-06 11:05:54,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085556931] [2021-01-06 11:05:54,160 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 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 11:05:54,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:05:54,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:54,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:05:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:54,856 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 11:05:54,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:54,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-01-06 11:05:54,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137243693] [2021-01-06 11:05:54,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 11:05:54,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 11:05:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:05:54,859 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 32 states. [2021-01-06 11:05:54,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:54,940 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2021-01-06 11:05:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 11:05:54,941 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2021-01-06 11:05:54,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:54,941 INFO L225 Difference]: With dead ends: 118 [2021-01-06 11:05:54,942 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 11:05:54,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:05:54,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 11:05:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 11:05:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 11:05:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-01-06 11:05:54,949 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 72 [2021-01-06 11:05:54,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:54,949 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-01-06 11:05:54,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 11:05:54,950 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-01-06 11:05:54,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 11:05:54,950 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:54,951 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 8, 8, 8, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:55,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:55,161 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:55,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:55,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1700725467, now seen corresponding path program 9 times [2021-01-06 11:05:55,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:55,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124130833] [2021-01-06 11:05:55,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-01-06 11:05:55,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124130833] [2021-01-06 11:05:55,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131368835] [2021-01-06 11:05:55,500 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 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 11:05:55,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 11:05:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 11:05:55,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2021-01-06 11:05:55,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:55,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 27 [2021-01-06 11:05:55,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761869130] [2021-01-06 11:05:55,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 11:05:55,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:55,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 11:05:55,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:05:55,852 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 27 states. [2021-01-06 11:05:56,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:56,102 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2021-01-06 11:05:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 11:05:56,103 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 74 [2021-01-06 11:05:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:56,104 INFO L225 Difference]: With dead ends: 176 [2021-01-06 11:05:56,104 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 11:05:56,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2021-01-06 11:05:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 11:05:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 80. [2021-01-06 11:05:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 11:05:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2021-01-06 11:05:56,112 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 74 [2021-01-06 11:05:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:56,112 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2021-01-06 11:05:56,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 11:05:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2021-01-06 11:05:56,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 11:05:56,113 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:56,113 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 9, 9, 9, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:56,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:56,327 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:56,328 INFO L82 PathProgramCache]: Analyzing trace with hash 605502177, now seen corresponding path program 10 times [2021-01-06 11:05:56,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:56,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143529053] [2021-01-06 11:05:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-01-06 11:05:56,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143529053] [2021-01-06 11:05:56,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232387966] [2021-01-06 11:05:56,673 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 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 [2021-01-06 11:05:56,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:05:56,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:56,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 11:05:56,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2021-01-06 11:05:57,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:57,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 29 [2021-01-06 11:05:57,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424299028] [2021-01-06 11:05:57,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 11:05:57,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:57,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 11:05:57,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:05:57,043 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 29 states. [2021-01-06 11:05:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:57,282 INFO L93 Difference]: Finished difference Result 191 states and 196 transitions. [2021-01-06 11:05:57,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 11:05:57,282 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 79 [2021-01-06 11:05:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:57,284 INFO L225 Difference]: With dead ends: 191 [2021-01-06 11:05:57,284 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 11:05:57,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-01-06 11:05:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 11:05:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 85. [2021-01-06 11:05:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 11:05:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-01-06 11:05:57,291 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2021-01-06 11:05:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:57,291 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-01-06 11:05:57,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 11:05:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-01-06 11:05:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 11:05:57,292 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:57,292 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 10, 10, 10, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:57,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 11:05:57,506 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:57,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:57,506 INFO L82 PathProgramCache]: Analyzing trace with hash -956491937, now seen corresponding path program 11 times [2021-01-06 11:05:57,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:57,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168362527] [2021-01-06 11:05:57,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-01-06 11:05:57,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168362527] [2021-01-06 11:05:57,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051314534] [2021-01-06 11:05:57,858 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:05:58,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 11:05:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:05:58,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 11:05:58,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:05:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-01-06 11:05:58,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:05:58,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 13] total 31 [2021-01-06 11:05:58,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418791000] [2021-01-06 11:05:58,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 11:05:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:05:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 11:05:58,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:05:58,806 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 31 states. [2021-01-06 11:05:59,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:05:59,091 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2021-01-06 11:05:59,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 11:05:59,091 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 84 [2021-01-06 11:05:59,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:05:59,093 INFO L225 Difference]: With dead ends: 206 [2021-01-06 11:05:59,093 INFO L226 Difference]: Without dead ends: 158 [2021-01-06 11:05:59,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=663, Unknown=0, NotChecked=0, Total=930 [2021-01-06 11:05:59,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-01-06 11:05:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2021-01-06 11:05:59,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 11:05:59,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2021-01-06 11:05:59,100 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 84 [2021-01-06 11:05:59,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:05:59,101 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2021-01-06 11:05:59,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 11:05:59,101 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2021-01-06 11:05:59,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 11:05:59,102 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:05:59,102 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 11, 11, 11, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:05:59,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 11:05:59,316 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:05:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:05:59,316 INFO L82 PathProgramCache]: Analyzing trace with hash 251556445, now seen corresponding path program 12 times [2021-01-06 11:05:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:05:59,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062252008] [2021-01-06 11:05:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:05:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:05:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 11:05:59,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062252008] [2021-01-06 11:05:59,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045829602] [2021-01-06 11:05:59,758 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:00,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 11:06:00,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 11:06:00,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:00,614 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-01-06 11:06:00,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:00,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 13] total 32 [2021-01-06 11:06:00,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698173899] [2021-01-06 11:06:00,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 11:06:00,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:00,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 11:06:00,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=753, Unknown=0, NotChecked=0, Total=992 [2021-01-06 11:06:00,616 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand 32 states. [2021-01-06 11:06:01,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:01,204 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2021-01-06 11:06:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 11:06:01,205 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2021-01-06 11:06:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:01,206 INFO L225 Difference]: With dead ends: 153 [2021-01-06 11:06:01,206 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 11:06:01,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:06:01,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 11:06:01,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2021-01-06 11:06:01,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 11:06:01,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2021-01-06 11:06:01,213 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 89 [2021-01-06 11:06:01,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:01,214 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2021-01-06 11:06:01,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 11:06:01,214 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2021-01-06 11:06:01,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 11:06:01,215 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:01,215 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:01,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 11:06:01,429 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:01,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1233500582, now seen corresponding path program 13 times [2021-01-06 11:06:01,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:01,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026564826] [2021-01-06 11:06:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:06:01,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026564826] [2021-01-06 11:06:01,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464023392] [2021-01-06 11:06:01,828 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:01,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 11:06:01,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:06:02,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:02,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-01-06 11:06:02,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683955643] [2021-01-06 11:06:02,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 11:06:02,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:02,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 11:06:02,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 11:06:02,769 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand 42 states. [2021-01-06 11:06:02,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:02,865 INFO L93 Difference]: Finished difference Result 156 states and 160 transitions. [2021-01-06 11:06:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 11:06:02,865 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 96 [2021-01-06 11:06:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:02,866 INFO L225 Difference]: With dead ends: 156 [2021-01-06 11:06:02,866 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 11:06:02,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=671, Invalid=1051, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 11:06:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 11:06:02,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-01-06 11:06:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 11:06:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2021-01-06 11:06:02,872 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 96 [2021-01-06 11:06:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:02,872 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2021-01-06 11:06:02,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 11:06:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2021-01-06 11:06:02,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 11:06:02,874 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:02,874 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:03,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 11:06:03,089 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:03,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash -272140632, now seen corresponding path program 14 times [2021-01-06 11:06:03,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:03,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132950426] [2021-01-06 11:06:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:03,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:06:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132950426] [2021-01-06 11:06:03,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092980577] [2021-01-06 11:06:03,560 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:03,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:06:03,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:03,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:06:03,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:06:04,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:04,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-01-06 11:06:04,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767635996] [2021-01-06 11:06:04,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 11:06:04,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 11:06:04,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 11:06:04,650 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 44 states. [2021-01-06 11:06:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:04,767 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2021-01-06 11:06:04,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 11:06:04,776 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 98 [2021-01-06 11:06:04,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:04,777 INFO L225 Difference]: With dead ends: 158 [2021-01-06 11:06:04,777 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 11:06:04,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=736, Invalid=1156, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 11:06:04,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 11:06:04,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-01-06 11:06:04,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 11:06:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-01-06 11:06:04,783 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2021-01-06 11:06:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:04,784 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-01-06 11:06:04,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 11:06:04,784 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-01-06 11:06:04,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-01-06 11:06:04,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:04,785 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 11, 11, 11, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:04,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 11:06:05,000 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:05,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:05,001 INFO L82 PathProgramCache]: Analyzing trace with hash 210631466, now seen corresponding path program 15 times [2021-01-06 11:06:05,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:05,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489721145] [2021-01-06 11:06:05,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-01-06 11:06:05,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489721145] [2021-01-06 11:06:05,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300107710] [2021-01-06 11:06:05,502 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:05,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 11:06:05,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:05,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 11:06:05,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-01-06 11:06:06,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:06,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 14] total 36 [2021-01-06 11:06:06,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947953779] [2021-01-06 11:06:06,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 11:06:06,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:06,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 11:06:06,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:06:06,071 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 36 states. [2021-01-06 11:06:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:06,356 INFO L93 Difference]: Finished difference Result 230 states and 235 transitions. [2021-01-06 11:06:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 11:06:06,356 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 100 [2021-01-06 11:06:06,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:06,357 INFO L225 Difference]: With dead ends: 230 [2021-01-06 11:06:06,358 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 11:06:06,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 11:06:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 11:06:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 106. [2021-01-06 11:06:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2021-01-06 11:06:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2021-01-06 11:06:06,366 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2021-01-06 11:06:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:06,366 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2021-01-06 11:06:06,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 11:06:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2021-01-06 11:06:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-01-06 11:06:06,367 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:06,367 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 12, 12, 12, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:06,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:06,582 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:06,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1180537624, now seen corresponding path program 16 times [2021-01-06 11:06:06,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:06,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798701540] [2021-01-06 11:06:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2021-01-06 11:06:07,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798701540] [2021-01-06 11:06:07,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224031993] [2021-01-06 11:06:07,152 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:07,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:06:07,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:07,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 11:06:07,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 11:06:07,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:07,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 38 [2021-01-06 11:06:07,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723039188] [2021-01-06 11:06:07,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 11:06:07,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 11:06:07,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 11:06:07,642 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand 38 states. [2021-01-06 11:06:07,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:07,959 INFO L93 Difference]: Finished difference Result 245 states and 250 transitions. [2021-01-06 11:06:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 11:06:07,959 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 105 [2021-01-06 11:06:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:07,961 INFO L225 Difference]: With dead ends: 245 [2021-01-06 11:06:07,961 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 11:06:07,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=404, Invalid=1002, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 11:06:07,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 11:06:07,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 111. [2021-01-06 11:06:07,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 11:06:07,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2021-01-06 11:06:07,969 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2021-01-06 11:06:07,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:07,969 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2021-01-06 11:06:07,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 11:06:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2021-01-06 11:06:07,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-01-06 11:06:07,970 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:07,970 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 13, 13, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:08,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 11:06:08,186 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:08,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:08,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1538188882, now seen corresponding path program 17 times [2021-01-06 11:06:08,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:08,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88629753] [2021-01-06 11:06:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:08,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:08,761 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2021-01-06 11:06:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88629753] [2021-01-06 11:06:08,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033483824] [2021-01-06 11:06:08,762 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:09,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 11:06:09,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:09,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 11:06:09,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 800 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 11:06:09,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:09,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 40 [2021-01-06 11:06:09,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045629286] [2021-01-06 11:06:09,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 11:06:09,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:09,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 11:06:09,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:06:09,883 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 40 states. [2021-01-06 11:06:10,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:10,172 INFO L93 Difference]: Finished difference Result 260 states and 265 transitions. [2021-01-06 11:06:10,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 11:06:10,172 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 110 [2021-01-06 11:06:10,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:10,174 INFO L225 Difference]: With dead ends: 260 [2021-01-06 11:06:10,174 INFO L226 Difference]: Without dead ends: 198 [2021-01-06 11:06:10,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 11:06:10,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-01-06 11:06:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 116. [2021-01-06 11:06:10,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 11:06:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-01-06 11:06:10,183 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 110 [2021-01-06 11:06:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:10,184 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-01-06 11:06:10,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 11:06:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-01-06 11:06:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-01-06 11:06:10,185 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:10,185 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 14, 14, 14, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:10,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:10,398 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:10,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:10,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1240768364, now seen corresponding path program 18 times [2021-01-06 11:06:10,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:10,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916428852] [2021-01-06 11:06:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 311 trivial. 0 not checked. [2021-01-06 11:06:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916428852] [2021-01-06 11:06:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694134804] [2021-01-06 11:06:11,022 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:12,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-01-06 11:06:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 11:06:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:13,110 INFO L134 CoverageAnalysis]: Checked inductivity of 887 backedges. 0 proven. 203 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2021-01-06 11:06:13,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:13,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 39 [2021-01-06 11:06:13,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027927502] [2021-01-06 11:06:13,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 11:06:13,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:13,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 11:06:13,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=1098, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 11:06:13,113 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 39 states. [2021-01-06 11:06:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:13,892 INFO L93 Difference]: Finished difference Result 193 states and 198 transitions. [2021-01-06 11:06:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 11:06:13,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 115 [2021-01-06 11:06:13,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:13,893 INFO L225 Difference]: With dead ends: 193 [2021-01-06 11:06:13,893 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 11:06:13,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=399, Invalid=1323, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 11:06:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 11:06:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2021-01-06 11:06:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 11:06:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2021-01-06 11:06:13,902 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 115 [2021-01-06 11:06:13,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:13,902 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2021-01-06 11:06:13,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 11:06:13,902 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2021-01-06 11:06:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 11:06:13,903 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:13,904 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:14,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 11:06:14,113 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:14,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:14,114 INFO L82 PathProgramCache]: Analyzing trace with hash 528635727, now seen corresponding path program 19 times [2021-01-06 11:06:14,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:14,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335575300] [2021-01-06 11:06:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-01-06 11:06:14,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335575300] [2021-01-06 11:06:14,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154018261] [2021-01-06 11:06:14,774 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:14,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 11:06:14,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-01-06 11:06:16,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:16,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-01-06 11:06:16,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664683850] [2021-01-06 11:06:16,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 11:06:16,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 11:06:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 11:06:16,400 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 54 states. [2021-01-06 11:06:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:16,528 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2021-01-06 11:06:16,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 11:06:16,529 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 122 [2021-01-06 11:06:16,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:16,530 INFO L225 Difference]: With dead ends: 196 [2021-01-06 11:06:16,530 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 11:06:16,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=1756, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 11:06:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 11:06:16,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-01-06 11:06:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 11:06:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2021-01-06 11:06:16,539 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2021-01-06 11:06:16,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:16,539 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2021-01-06 11:06:16,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 11:06:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2021-01-06 11:06:16,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-01-06 11:06:16,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:16,541 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:16,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:16,754 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:16,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:16,755 INFO L82 PathProgramCache]: Analyzing trace with hash -763103791, now seen corresponding path program 20 times [2021-01-06 11:06:16,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:16,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570726520] [2021-01-06 11:06:16,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-01-06 11:06:17,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570726520] [2021-01-06 11:06:17,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020018021] [2021-01-06 11:06:17,433 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:17,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:06:17,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:17,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 11:06:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1005 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-01-06 11:06:19,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:19,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2021-01-06 11:06:19,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039697238] [2021-01-06 11:06:19,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 11:06:19,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:19,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 11:06:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 11:06:19,171 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand 56 states. [2021-01-06 11:06:19,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:19,339 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2021-01-06 11:06:19,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 11:06:19,340 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 124 [2021-01-06 11:06:19,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:19,341 INFO L225 Difference]: With dead ends: 198 [2021-01-06 11:06:19,341 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 11:06:19,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1189, Invalid=1891, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 11:06:19,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 11:06:19,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-01-06 11:06:19,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2021-01-06 11:06:19,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2021-01-06 11:06:19,349 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2021-01-06 11:06:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:19,349 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2021-01-06 11:06:19,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 11:06:19,349 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2021-01-06 11:06:19,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 11:06:19,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:19,351 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 14, 14, 14, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:19,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 11:06:19,564 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:19,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:19,565 INFO L82 PathProgramCache]: Analyzing trace with hash -879232045, now seen corresponding path program 21 times [2021-01-06 11:06:19,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:19,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947692354] [2021-01-06 11:06:19,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 329 trivial. 0 not checked. [2021-01-06 11:06:20,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947692354] [2021-01-06 11:06:20,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129095385] [2021-01-06 11:06:20,325 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:20,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-01-06 11:06:20,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:20,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 11:06:20,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:21,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 771 trivial. 0 not checked. [2021-01-06 11:06:21,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:21,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17] total 45 [2021-01-06 11:06:21,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526095239] [2021-01-06 11:06:21,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 11:06:21,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:21,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 11:06:21,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 11:06:21,088 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 45 states. [2021-01-06 11:06:21,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:21,432 INFO L93 Difference]: Finished difference Result 284 states and 289 transitions. [2021-01-06 11:06:21,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 11:06:21,432 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 126 [2021-01-06 11:06:21,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:21,434 INFO L225 Difference]: With dead ends: 284 [2021-01-06 11:06:21,434 INFO L226 Difference]: Without dead ends: 214 [2021-01-06 11:06:21,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=1410, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 11:06:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-01-06 11:06:21,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 132. [2021-01-06 11:06:21,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 11:06:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2021-01-06 11:06:21,445 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 126 [2021-01-06 11:06:21,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:21,445 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2021-01-06 11:06:21,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 11:06:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2021-01-06 11:06:21,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 11:06:21,446 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:21,446 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 15, 15, 15, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:21,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:21,661 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash -935507031, now seen corresponding path program 22 times [2021-01-06 11:06:21,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:21,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853370296] [2021-01-06 11:06:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:21,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-01-06 11:06:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853370296] [2021-01-06 11:06:22,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428080100] [2021-01-06 11:06:22,430 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:22,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:06:22,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:22,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 11:06:22,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2021-01-06 11:06:23,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:23,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 18] total 47 [2021-01-06 11:06:23,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751258095] [2021-01-06 11:06:23,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 11:06:23,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:23,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 11:06:23,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 11:06:23,206 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 47 states. [2021-01-06 11:06:23,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:23,591 INFO L93 Difference]: Finished difference Result 299 states and 304 transitions. [2021-01-06 11:06:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 11:06:23,591 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 131 [2021-01-06 11:06:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:23,593 INFO L225 Difference]: With dead ends: 299 [2021-01-06 11:06:23,594 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 11:06:23,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 11:06:23,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 11:06:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 137. [2021-01-06 11:06:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 11:06:23,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-01-06 11:06:23,603 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 131 [2021-01-06 11:06:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:23,604 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-01-06 11:06:23,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 11:06:23,604 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-01-06 11:06:23,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-01-06 11:06:23,605 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:23,605 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 16, 16, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:23,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 11:06:23,821 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash -739810217, now seen corresponding path program 23 times [2021-01-06 11:06:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:23,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563822759] [2021-01-06 11:06:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 418 trivial. 0 not checked. [2021-01-06 11:06:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563822759] [2021-01-06 11:06:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518138439] [2021-01-06 11:06:24,670 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:25,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 11:06:25,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 11:06:25,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:26,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1259 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-01-06 11:06:26,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:26,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 19] total 49 [2021-01-06 11:06:26,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916015913] [2021-01-06 11:06:26,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 11:06:26,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:26,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 11:06:26,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:06:26,265 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 49 states. [2021-01-06 11:06:26,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:26,596 INFO L93 Difference]: Finished difference Result 314 states and 319 transitions. [2021-01-06 11:06:26,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 11:06:26,597 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 136 [2021-01-06 11:06:26,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:26,599 INFO L225 Difference]: With dead ends: 314 [2021-01-06 11:06:26,600 INFO L226 Difference]: Without dead ends: 238 [2021-01-06 11:06:26,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1686, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 11:06:26,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-01-06 11:06:26,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 142. [2021-01-06 11:06:26,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 11:06:26,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2021-01-06 11:06:26,611 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2021-01-06 11:06:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:26,611 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2021-01-06 11:06:26,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 11:06:26,611 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2021-01-06 11:06:26,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 11:06:26,612 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:26,612 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 17, 17, 17, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:26,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:26,825 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:26,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1877634853, now seen corresponding path program 24 times [2021-01-06 11:06:26,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:26,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837716593] [2021-01-06 11:06:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:27,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-01-06 11:06:27,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837716593] [2021-01-06 11:06:27,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436679180] [2021-01-06 11:06:27,731 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:29,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-01-06 11:06:29,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:29,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 11:06:29,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:30,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1367 backedges. 86 proven. 469 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2021-01-06 11:06:30,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:30,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24] total 54 [2021-01-06 11:06:30,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386874590] [2021-01-06 11:06:30,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 11:06:30,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:30,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 11:06:30,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2077, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 11:06:30,304 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand 54 states. [2021-01-06 11:06:31,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:31,621 INFO L93 Difference]: Finished difference Result 234 states and 240 transitions. [2021-01-06 11:06:31,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 11:06:31,621 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2021-01-06 11:06:31,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:31,623 INFO L225 Difference]: With dead ends: 234 [2021-01-06 11:06:31,623 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 11:06:31,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=916, Invalid=3776, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 11:06:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 11:06:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2021-01-06 11:06:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2021-01-06 11:06:31,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2021-01-06 11:06:31,635 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 141 [2021-01-06 11:06:31,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:31,635 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2021-01-06 11:06:31,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 11:06:31,636 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2021-01-06 11:06:31,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-01-06 11:06:31,636 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:31,636 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:31,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 11:06:31,850 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:31,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:31,850 INFO L82 PathProgramCache]: Analyzing trace with hash -954155808, now seen corresponding path program 25 times [2021-01-06 11:06:31,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:31,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994471157] [2021-01-06 11:06:31,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-01-06 11:06:32,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994471157] [2021-01-06 11:06:32,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322736230] [2021-01-06 11:06:32,865 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:32,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 11:06:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-01-06 11:06:35,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:35,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2021-01-06 11:06:35,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885645553] [2021-01-06 11:06:35,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 11:06:35,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:35,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 11:06:35,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:06:35,352 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 68 states. [2021-01-06 11:06:35,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:35,535 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2021-01-06 11:06:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 11:06:35,535 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 150 [2021-01-06 11:06:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:35,536 INFO L225 Difference]: With dead ends: 238 [2021-01-06 11:06:35,536 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 11:06:35,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1750, Invalid=2806, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:06:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 11:06:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-01-06 11:06:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2021-01-06 11:06:35,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 155 transitions. [2021-01-06 11:06:35,552 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 155 transitions. Word has length 150 [2021-01-06 11:06:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:35,552 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 155 transitions. [2021-01-06 11:06:35,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 11:06:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 155 transitions. [2021-01-06 11:06:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-01-06 11:06:35,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:35,554 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:35,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-01-06 11:06:35,767 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:35,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:35,768 INFO L82 PathProgramCache]: Analyzing trace with hash 674980962, now seen corresponding path program 26 times [2021-01-06 11:06:35,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:35,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747680451] [2021-01-06 11:06:35,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:36,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-01-06 11:06:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747680451] [2021-01-06 11:06:36,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656570057] [2021-01-06 11:06:36,822 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:36,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:06:36,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:36,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 11:06:36,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1579 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-01-06 11:06:39,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:39,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2021-01-06 11:06:39,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267441990] [2021-01-06 11:06:39,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 11:06:39,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:39,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 11:06:39,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 11:06:39,520 INFO L87 Difference]: Start difference. First operand 153 states and 155 transitions. Second operand 70 states. [2021-01-06 11:06:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:39,704 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2021-01-06 11:06:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 11:06:39,705 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 152 [2021-01-06 11:06:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:39,706 INFO L225 Difference]: With dead ends: 240 [2021-01-06 11:06:39,706 INFO L226 Difference]: Without dead ends: 156 [2021-01-06 11:06:39,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1854, Invalid=2976, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 11:06:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-01-06 11:06:39,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-01-06 11:06:39,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 11:06:39,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2021-01-06 11:06:39,718 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 152 [2021-01-06 11:06:39,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:39,719 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2021-01-06 11:06:39,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 11:06:39,719 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2021-01-06 11:06:39,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 11:06:39,720 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:39,720 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 17, 17, 17, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:39,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 11:06:39,935 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:39,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1387646108, now seen corresponding path program 27 times [2021-01-06 11:06:39,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:39,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397067927] [2021-01-06 11:06:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2021-01-06 11:06:41,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397067927] [2021-01-06 11:06:41,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6703511] [2021-01-06 11:06:41,004 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:41,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-01-06 11:06:41,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 11:06:41,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2021-01-06 11:06:42,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:42,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 20] total 55 [2021-01-06 11:06:42,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380659195] [2021-01-06 11:06:42,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 11:06:42,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 11:06:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=855, Invalid=2115, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:06:42,191 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 55 states. [2021-01-06 11:06:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:42,709 INFO L93 Difference]: Finished difference Result 340 states and 345 transitions. [2021-01-06 11:06:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 11:06:42,710 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 154 [2021-01-06 11:06:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:42,712 INFO L225 Difference]: With dead ends: 340 [2021-01-06 11:06:42,712 INFO L226 Difference]: Without dead ends: 256 [2021-01-06 11:06:42,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=855, Invalid=2115, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:06:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-01-06 11:06:42,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 160. [2021-01-06 11:06:42,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2021-01-06 11:06:42,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2021-01-06 11:06:42,724 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 154 [2021-01-06 11:06:42,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:42,725 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2021-01-06 11:06:42,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 11:06:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2021-01-06 11:06:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-01-06 11:06:42,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:42,726 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 18, 18, 18, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:42,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 11:06:42,941 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:42,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:42,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1495693730, now seen corresponding path program 28 times [2021-01-06 11:06:42,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:42,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526291928] [2021-01-06 11:06:42,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2021-01-06 11:06:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526291928] [2021-01-06 11:06:44,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81497259] [2021-01-06 11:06:44,161 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:06:44,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:06:44,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:06:44,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 11:06:44,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:06:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1767 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 1290 trivial. 0 not checked. [2021-01-06 11:06:45,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:06:45,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 21] total 57 [2021-01-06 11:06:45,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179941111] [2021-01-06 11:06:45,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 11:06:45,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:06:45,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 11:06:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=2280, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 11:06:45,245 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand 57 states. [2021-01-06 11:06:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:06:45,806 INFO L93 Difference]: Finished difference Result 355 states and 360 transitions. [2021-01-06 11:06:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 11:06:45,806 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 159 [2021-01-06 11:06:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:06:45,808 INFO L225 Difference]: With dead ends: 355 [2021-01-06 11:06:45,808 INFO L226 Difference]: Without dead ends: 268 [2021-01-06 11:06:45,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=912, Invalid=2280, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 11:06:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-01-06 11:06:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 165. [2021-01-06 11:06:45,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2021-01-06 11:06:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2021-01-06 11:06:45,821 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 159 [2021-01-06 11:06:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:06:45,821 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2021-01-06 11:06:45,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 11:06:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2021-01-06 11:06:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-01-06 11:06:45,823 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:06:45,823 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 19, 19, 19, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:06:46,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 11:06:46,037 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:06:46,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:06:46,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1539323032, now seen corresponding path program 29 times [2021-01-06 11:06:46,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:06:46,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843628814] [2021-01-06 11:06:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:06:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:06:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2021-01-06 11:06:47,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843628814] [2021-01-06 11:06:47,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916932126] [2021-01-06 11:06:47,311 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:01,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-01-06 11:07:01,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 11:07:01,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 1361 trivial. 0 not checked. [2021-01-06 11:07:02,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:02,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22] total 59 [2021-01-06 11:07:02,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966695342] [2021-01-06 11:07:02,433 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 11:07:02,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:02,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 11:07:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=2451, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 11:07:02,436 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand 59 states. [2021-01-06 11:07:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:03,018 INFO L93 Difference]: Finished difference Result 370 states and 375 transitions. [2021-01-06 11:07:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 11:07:03,019 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 164 [2021-01-06 11:07:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:03,022 INFO L225 Difference]: With dead ends: 370 [2021-01-06 11:07:03,023 INFO L226 Difference]: Without dead ends: 280 [2021-01-06 11:07:03,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=971, Invalid=2451, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 11:07:03,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-01-06 11:07:03,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 170. [2021-01-06 11:07:03,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 11:07:03,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 172 transitions. [2021-01-06 11:07:03,039 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 172 transitions. Word has length 164 [2021-01-06 11:07:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:03,039 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 172 transitions. [2021-01-06 11:07:03,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 11:07:03,039 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 172 transitions. [2021-01-06 11:07:03,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 11:07:03,040 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:03,040 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 20, 20, 20, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:03,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 11:07:03,255 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:03,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1789425062, now seen corresponding path program 30 times [2021-01-06 11:07:03,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:03,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895196396] [2021-01-06 11:07:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:03,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2021-01-06 11:07:04,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895196396] [2021-01-06 11:07:04,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313258176] [2021-01-06 11:07:04,596 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:22,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2021-01-06 11:07:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 11:07:22,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 1670 trivial. 0 not checked. [2021-01-06 11:07:23,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:23,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2021-01-06 11:07:23,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101606376] [2021-01-06 11:07:23,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 11:07:23,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:23,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 11:07:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=2148, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 11:07:23,098 INFO L87 Difference]: Start difference. First operand 170 states and 172 transitions. Second operand 55 states. [2021-01-06 11:07:24,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:24,837 INFO L93 Difference]: Finished difference Result 275 states and 280 transitions. [2021-01-06 11:07:24,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 11:07:24,841 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 169 [2021-01-06 11:07:24,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:24,842 INFO L225 Difference]: With dead ends: 275 [2021-01-06 11:07:24,842 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 11:07:24,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=837, Invalid=2469, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 11:07:24,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 11:07:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 177. [2021-01-06 11:07:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2021-01-06 11:07:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2021-01-06 11:07:24,856 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 169 [2021-01-06 11:07:24,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:24,856 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2021-01-06 11:07:24,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 11:07:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2021-01-06 11:07:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-01-06 11:07:24,857 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:24,857 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:25,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-01-06 11:07:25,073 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:25,073 INFO L82 PathProgramCache]: Analyzing trace with hash 698926025, now seen corresponding path program 31 times [2021-01-06 11:07:25,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:25,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825999111] [2021-01-06 11:07:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-01-06 11:07:26,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825999111] [2021-01-06 11:07:26,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958190612] [2021-01-06 11:07:26,668 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:26,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 11:07:26,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:30,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-01-06 11:07:30,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:30,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2021-01-06 11:07:30,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945210990] [2021-01-06 11:07:30,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 11:07:30,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:30,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 11:07:30,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 11:07:30,287 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 80 states. [2021-01-06 11:07:30,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:30,504 INFO L93 Difference]: Finished difference Result 278 states and 282 transitions. [2021-01-06 11:07:30,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 11:07:30,505 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 176 [2021-01-06 11:07:30,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:30,506 INFO L225 Difference]: With dead ends: 278 [2021-01-06 11:07:30,506 INFO L226 Difference]: Without dead ends: 180 [2021-01-06 11:07:30,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2419, Invalid=3901, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 11:07:30,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-01-06 11:07:30,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-01-06 11:07:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 11:07:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2021-01-06 11:07:30,519 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 176 [2021-01-06 11:07:30,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:30,520 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2021-01-06 11:07:30,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 11:07:30,520 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2021-01-06 11:07:30,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 11:07:30,521 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:30,521 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:30,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:30,737 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:30,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:30,737 INFO L82 PathProgramCache]: Analyzing trace with hash -77910837, now seen corresponding path program 32 times [2021-01-06 11:07:30,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:30,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101246442] [2021-01-06 11:07:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-01-06 11:07:32,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101246442] [2021-01-06 11:07:32,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909855189] [2021-01-06 11:07:32,258 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:32,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:07:32,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 11:07:32,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2204 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-01-06 11:07:36,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:36,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2021-01-06 11:07:36,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569251134] [2021-01-06 11:07:36,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 11:07:36,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:36,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 11:07:36,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 11:07:36,003 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 82 states. [2021-01-06 11:07:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:36,240 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2021-01-06 11:07:36,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 11:07:36,241 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 178 [2021-01-06 11:07:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:36,241 INFO L225 Difference]: With dead ends: 280 [2021-01-06 11:07:36,242 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 11:07:36,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2541, Invalid=4101, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 11:07:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 11:07:36,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-01-06 11:07:36,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 11:07:36,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 183 transitions. [2021-01-06 11:07:36,254 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 183 transitions. Word has length 178 [2021-01-06 11:07:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:36,254 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 183 transitions. [2021-01-06 11:07:36,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 11:07:36,255 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 183 transitions. [2021-01-06 11:07:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-01-06 11:07:36,256 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:36,256 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 20, 20, 20, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:36,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:36,470 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:36,470 INFO L82 PathProgramCache]: Analyzing trace with hash 706174285, now seen corresponding path program 33 times [2021-01-06 11:07:36,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:36,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613818664] [2021-01-06 11:07:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:36,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:38,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 683 trivial. 0 not checked. [2021-01-06 11:07:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613818664] [2021-01-06 11:07:38,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283468208] [2021-01-06 11:07:38,181 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:38,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-01-06 11:07:38,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:38,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 11:07:38,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 1693 trivial. 0 not checked. [2021-01-06 11:07:40,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:40,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2021-01-06 11:07:40,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860620738] [2021-01-06 11:07:40,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 11:07:40,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:40,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 11:07:40,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 11:07:40,070 INFO L87 Difference]: Start difference. First operand 181 states and 183 transitions. Second operand 64 states. [2021-01-06 11:07:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:40,762 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2021-01-06 11:07:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 11:07:40,763 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 180 [2021-01-06 11:07:40,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:40,765 INFO L225 Difference]: With dead ends: 394 [2021-01-06 11:07:40,766 INFO L226 Difference]: Without dead ends: 296 [2021-01-06 11:07:40,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1155, Invalid=2877, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 11:07:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-01-06 11:07:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 186. [2021-01-06 11:07:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 11:07:40,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2021-01-06 11:07:40,777 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 180 [2021-01-06 11:07:40,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:40,778 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2021-01-06 11:07:40,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 11:07:40,778 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2021-01-06 11:07:40,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 11:07:40,779 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:40,779 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 21, 21, 21, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:40,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:40,980 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:40,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:40,981 INFO L82 PathProgramCache]: Analyzing trace with hash 262194479, now seen corresponding path program 34 times [2021-01-06 11:07:40,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:40,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555874118] [2021-01-06 11:07:40,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 744 trivial. 0 not checked. [2021-01-06 11:07:42,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555874118] [2021-01-06 11:07:42,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918105941] [2021-01-06 11:07:42,809 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:42,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:07:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:42,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 11:07:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:07:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 1774 trivial. 0 not checked. [2021-01-06 11:07:44,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:07:44,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 24] total 66 [2021-01-06 11:07:44,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924375516] [2021-01-06 11:07:44,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 11:07:44,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:07:44,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 11:07:44,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 11:07:44,330 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 66 states. [2021-01-06 11:07:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:07:45,050 INFO L93 Difference]: Finished difference Result 409 states and 414 transitions. [2021-01-06 11:07:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 11:07:45,050 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 185 [2021-01-06 11:07:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:07:45,052 INFO L225 Difference]: With dead ends: 409 [2021-01-06 11:07:45,053 INFO L226 Difference]: Without dead ends: 308 [2021-01-06 11:07:45,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1221, Invalid=3069, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 11:07:45,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-01-06 11:07:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 191. [2021-01-06 11:07:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2021-01-06 11:07:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2021-01-06 11:07:45,067 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2021-01-06 11:07:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:07:45,067 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2021-01-06 11:07:45,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 11:07:45,068 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2021-01-06 11:07:45,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-01-06 11:07:45,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:07:45,069 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 22, 22, 22, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:07:45,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 11:07:45,283 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:07:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:07:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2065965231, now seen corresponding path program 35 times [2021-01-06 11:07:45,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:07:45,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421509366] [2021-01-06 11:07:45,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:07:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:07:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 808 trivial. 0 not checked. [2021-01-06 11:07:47,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421509366] [2021-01-06 11:07:47,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936106088] [2021-01-06 11:07:47,129 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:07:58,961 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-01-06 11:07:58,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:07:58,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 11:07:58,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:08:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1857 trivial. 0 not checked. [2021-01-06 11:08:00,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:08:00,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 25] total 68 [2021-01-06 11:08:00,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521970938] [2021-01-06 11:08:00,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 11:08:00,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:08:00,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 11:08:00,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:08:00,455 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 68 states. [2021-01-06 11:08:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:08:01,031 INFO L93 Difference]: Finished difference Result 424 states and 429 transitions. [2021-01-06 11:08:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 11:08:01,033 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 190 [2021-01-06 11:08:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:08:01,035 INFO L225 Difference]: With dead ends: 424 [2021-01-06 11:08:01,035 INFO L226 Difference]: Without dead ends: 320 [2021-01-06 11:08:01,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1289, Invalid=3267, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 11:08:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-01-06 11:08:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 196. [2021-01-06 11:08:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2021-01-06 11:08:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 198 transitions. [2021-01-06 11:08:01,050 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 198 transitions. Word has length 190 [2021-01-06 11:08:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:08:01,051 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 198 transitions. [2021-01-06 11:08:01,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 11:08:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 198 transitions. [2021-01-06 11:08:01,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-01-06 11:08:01,052 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:08:01,052 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 23, 23, 23, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:08:01,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:01,267 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:08:01,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:08:01,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1135574827, now seen corresponding path program 36 times [2021-01-06 11:08:01,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:08:01,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469438712] [2021-01-06 11:08:01,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:08:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 875 trivial. 0 not checked. [2021-01-06 11:08:03,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469438712] [2021-01-06 11:08:03,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274062144] [2021-01-06 11:08:03,287 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:20,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2021-01-06 11:08:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:08:21,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 11:08:21,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:08:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2724 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 2241 trivial. 0 not checked. [2021-01-06 11:08:22,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:08:22,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 23] total 67 [2021-01-06 11:08:22,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25771492] [2021-01-06 11:08:22,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 11:08:22,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:08:22,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 11:08:22,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1118, Invalid=3304, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 11:08:22,994 INFO L87 Difference]: Start difference. First operand 196 states and 198 transitions. Second operand 67 states. [2021-01-06 11:08:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:08:28,183 INFO L93 Difference]: Finished difference Result 315 states and 320 transitions. [2021-01-06 11:08:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 11:08:28,184 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 195 [2021-01-06 11:08:28,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:08:28,186 INFO L225 Difference]: With dead ends: 315 [2021-01-06 11:08:28,186 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 11:08:28,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2583 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=3213, Invalid=9897, Unknown=0, NotChecked=0, Total=13110 [2021-01-06 11:08:28,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 11:08:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 203. [2021-01-06 11:08:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-01-06 11:08:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2021-01-06 11:08:28,201 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 195 [2021-01-06 11:08:28,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:08:28,202 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2021-01-06 11:08:28,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 11:08:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2021-01-06 11:08:28,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 11:08:28,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:08:28,203 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:08:28,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:28,419 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:08:28,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:08:28,420 INFO L82 PathProgramCache]: Analyzing trace with hash -90608872, now seen corresponding path program 37 times [2021-01-06 11:08:28,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:08:28,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007079405] [2021-01-06 11:08:28,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:08:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:30,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-01-06 11:08:30,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007079405] [2021-01-06 11:08:30,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742607608] [2021-01-06 11:08:30,475 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 11:08:30,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:08:35,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2844 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-01-06 11:08:35,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:08:35,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2021-01-06 11:08:35,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468281490] [2021-01-06 11:08:35,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-01-06 11:08:35,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:08:35,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-01-06 11:08:35,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 11:08:35,478 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 92 states. [2021-01-06 11:08:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:08:35,767 INFO L93 Difference]: Finished difference Result 318 states and 322 transitions. [2021-01-06 11:08:35,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 11:08:35,768 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 202 [2021-01-06 11:08:35,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:08:35,769 INFO L225 Difference]: With dead ends: 318 [2021-01-06 11:08:35,769 INFO L226 Difference]: Without dead ends: 206 [2021-01-06 11:08:35,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=3196, Invalid=5176, Unknown=0, NotChecked=0, Total=8372 [2021-01-06 11:08:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-01-06 11:08:35,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-01-06 11:08:35,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2021-01-06 11:08:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 207 transitions. [2021-01-06 11:08:35,780 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 207 transitions. Word has length 202 [2021-01-06 11:08:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:08:35,781 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 207 transitions. [2021-01-06 11:08:35,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2021-01-06 11:08:35,781 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 207 transitions. [2021-01-06 11:08:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-01-06 11:08:35,781 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:08:35,782 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:08:35,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-01-06 11:08:35,982 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:08:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:08:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash -464734822, now seen corresponding path program 38 times [2021-01-06 11:08:35,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:08:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507928329] [2021-01-06 11:08:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:08:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:38,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-01-06 11:08:38,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507928329] [2021-01-06 11:08:38,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91929670] [2021-01-06 11:08:38,132 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:38,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 11:08:38,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:08:38,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 11:08:38,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:08:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2933 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-01-06 11:08:43,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:08:43,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2021-01-06 11:08:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123267455] [2021-01-06 11:08:43,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-01-06 11:08:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:08:43,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-01-06 11:08:43,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 11:08:43,405 INFO L87 Difference]: Start difference. First operand 205 states and 207 transitions. Second operand 94 states. [2021-01-06 11:08:43,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:08:43,717 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2021-01-06 11:08:43,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 11:08:43,718 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 204 [2021-01-06 11:08:43,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:08:43,719 INFO L225 Difference]: With dead ends: 320 [2021-01-06 11:08:43,719 INFO L226 Difference]: Without dead ends: 208 [2021-01-06 11:08:43,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3336, Invalid=5406, Unknown=0, NotChecked=0, Total=8742 [2021-01-06 11:08:43,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-01-06 11:08:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-01-06 11:08:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2021-01-06 11:08:43,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2021-01-06 11:08:43,730 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 204 [2021-01-06 11:08:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:08:43,731 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2021-01-06 11:08:43,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 94 states. [2021-01-06 11:08:43,731 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2021-01-06 11:08:43,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-01-06 11:08:43,732 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:08:43,732 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 23, 23, 23, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:08:43,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 11:08:43,932 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:08:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:08:43,933 INFO L82 PathProgramCache]: Analyzing trace with hash 777480092, now seen corresponding path program 39 times [2021-01-06 11:08:43,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:08:43,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569133741] [2021-01-06 11:08:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:08:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:46,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 908 trivial. 0 not checked. [2021-01-06 11:08:46,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569133741] [2021-01-06 11:08:46,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807968957] [2021-01-06 11:08:46,138 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:47,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-01-06 11:08:47,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:08:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 11:08:47,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:08:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 2242 trivial. 0 not checked. [2021-01-06 11:08:49,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:08:49,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 26] total 73 [2021-01-06 11:08:49,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806222833] [2021-01-06 11:08:49,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 11:08:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:08:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 11:08:49,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 11:08:49,315 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 73 states. [2021-01-06 11:08:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:08:50,151 INFO L93 Difference]: Finished difference Result 448 states and 453 transitions. [2021-01-06 11:08:50,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 11:08:50,153 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 206 [2021-01-06 11:08:50,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:08:50,155 INFO L225 Difference]: With dead ends: 448 [2021-01-06 11:08:50,155 INFO L226 Difference]: Without dead ends: 336 [2021-01-06 11:08:50,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1500, Invalid=3756, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 11:08:50,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-01-06 11:08:50,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 212. [2021-01-06 11:08:50,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2021-01-06 11:08:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 214 transitions. [2021-01-06 11:08:50,171 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 214 transitions. Word has length 206 [2021-01-06 11:08:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:08:50,171 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 214 transitions. [2021-01-06 11:08:50,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 11:08:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 214 transitions. [2021-01-06 11:08:50,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-01-06 11:08:50,173 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:08:50,173 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 24, 24, 24, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:08:50,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 11:08:50,388 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:08:50,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:08:50,388 INFO L82 PathProgramCache]: Analyzing trace with hash -26444698, now seen corresponding path program 40 times [2021-01-06 11:08:50,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:08:50,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758862367] [2021-01-06 11:08:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:08:50,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 978 trivial. 0 not checked. [2021-01-06 11:08:52,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758862367] [2021-01-06 11:08:52,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401473456] [2021-01-06 11:08:52,660 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:52,827 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 11:08:52,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:08:52,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 11:08:52,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:08:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3187 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 2335 trivial. 0 not checked. [2021-01-06 11:08:54,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:08:54,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 27] total 75 [2021-01-06 11:08:54,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365027589] [2021-01-06 11:08:54,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 11:08:54,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:08:54,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 11:08:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 11:08:54,619 INFO L87 Difference]: Start difference. First operand 212 states and 214 transitions. Second operand 75 states. [2021-01-06 11:08:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:08:55,443 INFO L93 Difference]: Finished difference Result 463 states and 468 transitions. [2021-01-06 11:08:55,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 11:08:55,444 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 211 [2021-01-06 11:08:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:08:55,446 INFO L225 Difference]: With dead ends: 463 [2021-01-06 11:08:55,446 INFO L226 Difference]: Without dead ends: 348 [2021-01-06 11:08:55,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1575, Invalid=3975, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 11:08:55,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-01-06 11:08:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 217. [2021-01-06 11:08:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2021-01-06 11:08:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 219 transitions. [2021-01-06 11:08:55,460 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 219 transitions. Word has length 211 [2021-01-06 11:08:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:08:55,460 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 219 transitions. [2021-01-06 11:08:55,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 11:08:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 219 transitions. [2021-01-06 11:08:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-01-06 11:08:55,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:08:55,462 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 25, 25, 25, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:08:55,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:08:55,677 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:08:55,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:08:55,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1995828320, now seen corresponding path program 41 times [2021-01-06 11:08:55,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:08:55,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728433162] [2021-01-06 11:08:55,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:08:55,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:08:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 1051 trivial. 0 not checked. [2021-01-06 11:08:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728433162] [2021-01-06 11:08:58,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042435247] [2021-01-06 11:08:58,058 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:21,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-01-06 11:09:21,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 11:09:21,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 11:09:21,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 11:09:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3355 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 2430 trivial. 0 not checked. [2021-01-06 11:09:23,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 11:09:23,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 28] total 77 [2021-01-06 11:09:23,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009883330] [2021-01-06 11:09:23,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 11:09:23,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:09:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 11:09:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 11:09:23,736 INFO L87 Difference]: Start difference. First operand 217 states and 219 transitions. Second operand 77 states. [2021-01-06 11:09:24,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:09:24,702 INFO L93 Difference]: Finished difference Result 478 states and 483 transitions. [2021-01-06 11:09:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 11:09:24,703 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 216 [2021-01-06 11:09:24,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:09:24,705 INFO L225 Difference]: With dead ends: 478 [2021-01-06 11:09:24,705 INFO L226 Difference]: Without dead ends: 360 [2021-01-06 11:09:24,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1652, Invalid=4200, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 11:09:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-01-06 11:09:24,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 222. [2021-01-06 11:09:24,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2021-01-06 11:09:24,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2021-01-06 11:09:24,723 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 216 [2021-01-06 11:09:24,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:09:24,723 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2021-01-06 11:09:24,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 11:09:24,723 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2021-01-06 11:09:24,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-01-06 11:09:24,725 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:09:24,725 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 26, 26, 26, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:09:24,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 11:09:24,939 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:09:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:09:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1098077086, now seen corresponding path program 42 times [2021-01-06 11:09:24,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:09:24,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250327240] [2021-01-06 11:09:24,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:09:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:09:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 1127 trivial. 0 not checked. [2021-01-06 11:09:27,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250327240] [2021-01-06 11:09:27,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86996001] [2021-01-06 11:09:27,611 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true