/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-examples/standard_copyInit_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 09:47:16,367 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 09:47:16,371 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 09:47:16,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 09:47:16,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 09:47:16,428 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 09:47:16,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 09:47:16,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 09:47:16,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 09:47:16,447 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 09:47:16,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 09:47:16,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 09:47:16,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 09:47:16,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 09:47:16,459 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 09:47:16,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 09:47:16,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 09:47:16,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 09:47:16,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 09:47:16,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 09:47:16,487 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 09:47:16,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 09:47:16,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 09:47:16,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 09:47:16,494 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 09:47:16,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 09:47:16,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 09:47:16,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 09:47:16,506 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 09:47:16,534 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 09:47:16,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 09:47:16,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 09:47:16,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 09:47:16,536 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 09:47:16,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 09:47:16,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 09:47:16,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 09:47:16,537 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 09:47:16,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 09:47:16,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 09:47:16,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 09:47:16,538 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 09:47:16,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 09:47:16,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 09:47:16,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 09:47:16,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 09:47:16,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 09:47:16,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 09:47:16,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 09:47:16,540 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 09:47:16,540 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 09:47:16,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 09:47:16,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 09:47:16,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 09:47:16,540 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 09:47:16,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 09:47:16,983 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 09:47:16,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 09:47:16,987 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 09:47:16,988 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 09:47:16,989 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInit_ground.i [2021-01-06 09:47:17,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b9c48780/3d16a7ff0e614c29ad6b0b5e605604da/FLAGac7716701 [2021-01-06 09:47:17,709 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 09:47:17,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInit_ground.i [2021-01-06 09:47:17,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b9c48780/3d16a7ff0e614c29ad6b0b5e605604da/FLAGac7716701 [2021-01-06 09:47:18,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b9c48780/3d16a7ff0e614c29ad6b0b5e605604da [2021-01-06 09:47:18,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 09:47:18,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 09:47:18,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:18,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 09:47:18,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 09:47:18,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717ded63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18, skipping insertion in model container [2021-01-06 09:47:18,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 09:47:18,126 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 09:47:18,282 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-examples/standard_copyInit_ground.i[817,830] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~b~0,],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:18,302 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:18,312 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 09:47:18,326 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-examples/standard_copyInit_ground.i[817,830] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#b~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#b~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: lhs: VariableLHS[~x~0,] [2021-01-06 09:47:18,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 09:47:18,352 INFO L208 MainTranslator]: Completed translation [2021-01-06 09:47:18,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18 WrapperNode [2021-01-06 09:47:18,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 09:47:18,354 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:18,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 09:47:18,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 09:47:18,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,370 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,390 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 09:47:18,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 09:47:18,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 09:47:18,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 09:47:18,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (1/1) ... [2021-01-06 09:47:18,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 09:47:18,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 09:47:18,421 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 09:47:18,421 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 09:47:18,422 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (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 09:47:18,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 09:47:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 09:47:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 09:47:18,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 09:47:18,554 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 09:47:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 09:47:18,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 09:47:18,879 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 09:47:18,880 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-01-06 09:47:18,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:18 BoogieIcfgContainer [2021-01-06 09:47:18,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 09:47:18,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 09:47:18,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 09:47:18,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 09:47:18,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 09:47:18" (1/3) ... [2021-01-06 09:47:18,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf11e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:18, skipping insertion in model container [2021-01-06 09:47:18,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 09:47:18" (2/3) ... [2021-01-06 09:47:18,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecf11e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 09:47:18, skipping insertion in model container [2021-01-06 09:47:18,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 09:47:18" (3/3) ... [2021-01-06 09:47:18,915 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copyInit_ground.i [2021-01-06 09:47:18,923 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 09:47:18,929 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 09:47:18,955 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 09:47:18,994 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 09:47:18,994 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 09:47:18,995 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 09:47:18,995 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 09:47:18,995 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 09:47:18,995 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 09:47:18,996 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 09:47:18,996 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 09:47:19,022 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2021-01-06 09:47:19,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 09:47:19,041 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:19,042 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:19,046 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:19,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1158529610, now seen corresponding path program 1 times [2021-01-06 09:47:19,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:19,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081567761] [2021-01-06 09:47:19,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:19,467 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 09:47:19,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081567761] [2021-01-06 09:47:19,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 09:47:19,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 09:47:19,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992726007] [2021-01-06 09:47:19,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 09:47:19,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 09:47:19,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 09:47:19,505 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2021-01-06 09:47:19,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:19,561 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2021-01-06 09:47:19,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 09:47:19,564 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 09:47:19,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:19,574 INFO L225 Difference]: With dead ends: 34 [2021-01-06 09:47:19,574 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 09:47:19,578 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 09:47:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 09:47:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-01-06 09:47:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-01-06 09:47:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-01-06 09:47:19,621 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-01-06 09:47:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:19,621 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-01-06 09:47:19,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 09:47:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-01-06 09:47:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 09:47:19,622 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:19,623 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:19,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 09:47:19,623 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:19,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:19,625 INFO L82 PathProgramCache]: Analyzing trace with hash -795085041, now seen corresponding path program 1 times [2021-01-06 09:47:19,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:19,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092623113] [2021-01-06 09:47:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:19,701 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 09:47:19,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092623113] [2021-01-06 09:47:19,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991247594] [2021-01-06 09:47:19,702 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 09:47:19,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:19,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 09:47:19,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:19,882 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 09:47:19,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:19,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 09:47:19,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869383475] [2021-01-06 09:47:19,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 09:47:19,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:19,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 09:47:19,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:19,888 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2021-01-06 09:47:19,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:19,926 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2021-01-06 09:47:19,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 09:47:19,927 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-01-06 09:47:19,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:19,928 INFO L225 Difference]: With dead ends: 30 [2021-01-06 09:47:19,928 INFO L226 Difference]: Without dead ends: 19 [2021-01-06 09:47:19,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 09:47:19,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-01-06 09:47:19,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-01-06 09:47:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 09:47:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-01-06 09:47:19,935 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2021-01-06 09:47:19,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:19,935 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-01-06 09:47:19,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 09:47:19,936 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-01-06 09:47:19,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 09:47:19,936 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:19,936 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:20,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 09:47:20,151 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:20,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash 697974482, now seen corresponding path program 2 times [2021-01-06 09:47:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:20,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142851405] [2021-01-06 09:47:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:47:20,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142851405] [2021-01-06 09:47:20,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336278143] [2021-01-06 09:47:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:20,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:20,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:20,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 09:47:20,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:20,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 09:47:20,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:20,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 09:47:20,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923639149] [2021-01-06 09:47:20,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 09:47:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:20,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 09:47:20,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:20,390 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 6 states. [2021-01-06 09:47:20,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:20,436 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-01-06 09:47:20,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 09:47:20,437 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2021-01-06 09:47:20,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:20,438 INFO L225 Difference]: With dead ends: 35 [2021-01-06 09:47:20,438 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 09:47:20,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 09:47:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 09:47:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-01-06 09:47:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-01-06 09:47:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-01-06 09:47:20,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2021-01-06 09:47:20,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:20,446 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-01-06 09:47:20,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 09:47:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-01-06 09:47:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 09:47:20,447 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:20,447 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:20,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:20,662 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:20,664 INFO L82 PathProgramCache]: Analyzing trace with hash 648374507, now seen corresponding path program 3 times [2021-01-06 09:47:20,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:20,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259047118] [2021-01-06 09:47:20,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:47:20,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259047118] [2021-01-06 09:47:20,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77003130] [2021-01-06 09:47:20,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:20,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 09:47:20,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 09:47:20,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-01-06 09:47:20,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:20,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 09:47:20,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036399981] [2021-01-06 09:47:20,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 09:47:20,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:20,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 09:47:20,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:20,982 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2021-01-06 09:47:21,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:21,032 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2021-01-06 09:47:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 09:47:21,033 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 09:47:21,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:21,034 INFO L225 Difference]: With dead ends: 40 [2021-01-06 09:47:21,034 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 09:47:21,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 09:47:21,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 09:47:21,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 09:47:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 09:47:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-01-06 09:47:21,041 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 18 [2021-01-06 09:47:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:21,041 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-01-06 09:47:21,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 09:47:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-01-06 09:47:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 09:47:21,043 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:21,043 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:21,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:21,258 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:21,259 INFO L82 PathProgramCache]: Analyzing trace with hash -114341394, now seen corresponding path program 4 times [2021-01-06 09:47:21,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:21,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497448968] [2021-01-06 09:47:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 09:47:21,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497448968] [2021-01-06 09:47:21,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092850647] [2021-01-06 09:47:21,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:21,411 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:21,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:21,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 09:47:21,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-01-06 09:47:21,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:21,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 09:47:21,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386196506] [2021-01-06 09:47:21,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 09:47:21,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:21,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 09:47:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:21,473 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2021-01-06 09:47:21,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:21,531 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2021-01-06 09:47:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 09:47:21,532 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 09:47:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:21,533 INFO L225 Difference]: With dead ends: 45 [2021-01-06 09:47:21,533 INFO L226 Difference]: Without dead ends: 28 [2021-01-06 09:47:21,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 09:47:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-01-06 09:47:21,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-01-06 09:47:21,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 09:47:21,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-01-06 09:47:21,539 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2021-01-06 09:47:21,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:21,540 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-01-06 09:47:21,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 09:47:21,540 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-01-06 09:47:21,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 09:47:21,541 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:21,541 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:21,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:21,755 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:21,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:21,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1545825081, now seen corresponding path program 5 times [2021-01-06 09:47:21,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:21,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496096697] [2021-01-06 09:47:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-01-06 09:47:21,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496096697] [2021-01-06 09:47:21,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077806958] [2021-01-06 09:47:21,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:22,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 09:47:22,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 09:47:22,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 09:47:22,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:22,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 09:47:22,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470253450] [2021-01-06 09:47:22,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 09:47:22,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:22,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 09:47:22,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:22,110 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 9 states. [2021-01-06 09:47:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:22,169 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-01-06 09:47:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 09:47:22,169 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2021-01-06 09:47:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:22,170 INFO L225 Difference]: With dead ends: 50 [2021-01-06 09:47:22,170 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 09:47:22,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 09:47:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 09:47:22,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 09:47:22,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 09:47:22,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-01-06 09:47:22,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2021-01-06 09:47:22,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:22,177 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-01-06 09:47:22,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 09:47:22,178 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-01-06 09:47:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 09:47:22,179 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:22,179 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:22,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 09:47:22,393 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:22,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:22,394 INFO L82 PathProgramCache]: Analyzing trace with hash -503161078, now seen corresponding path program 6 times [2021-01-06 09:47:22,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:22,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138942559] [2021-01-06 09:47:22,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:22,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:22,488 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-01-06 09:47:22,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138942559] [2021-01-06 09:47:22,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052695926] [2021-01-06 09:47:22,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:22,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 09:47:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:22,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 09:47:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-01-06 09:47:22,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:22,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 09:47:22,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647939064] [2021-01-06 09:47:22,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 09:47:22,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:22,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 09:47:22,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:22,674 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2021-01-06 09:47:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:22,752 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-01-06 09:47:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 09:47:22,753 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2021-01-06 09:47:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:22,754 INFO L225 Difference]: With dead ends: 55 [2021-01-06 09:47:22,754 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 09:47:22,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 09:47:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 09:47:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-01-06 09:47:22,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-01-06 09:47:22,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-01-06 09:47:22,771 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2021-01-06 09:47:22,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:22,772 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-01-06 09:47:22,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 09:47:22,772 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-01-06 09:47:22,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-01-06 09:47:22,773 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:22,774 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:22,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:22,988 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1423017309, now seen corresponding path program 7 times [2021-01-06 09:47:22,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:22,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878583918] [2021-01-06 09:47:22,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 09:47:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878583918] [2021-01-06 09:47:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628567351] [2021-01-06 09:47:23,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:23,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 09:47:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:23,250 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-01-06 09:47:23,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:23,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 09:47:23,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160603626] [2021-01-06 09:47:23,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 09:47:23,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:23,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 09:47:23,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:23,253 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 11 states. [2021-01-06 09:47:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:23,321 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-01-06 09:47:23,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 09:47:23,321 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2021-01-06 09:47:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:23,322 INFO L225 Difference]: With dead ends: 60 [2021-01-06 09:47:23,322 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 09:47:23,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 09:47:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 09:47:23,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-01-06 09:47:23,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-01-06 09:47:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-01-06 09:47:23,328 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 30 [2021-01-06 09:47:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:23,328 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-01-06 09:47:23,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 09:47:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-01-06 09:47:23,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 09:47:23,330 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:23,330 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:23,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:23,540 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:23,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2023457242, now seen corresponding path program 8 times [2021-01-06 09:47:23,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:23,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945359841] [2021-01-06 09:47:23,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:47:23,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945359841] [2021-01-06 09:47:23,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101178126] [2021-01-06 09:47:23,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:23,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:23,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 09:47:23,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 09:47:23,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:23,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 09:47:23,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492132794] [2021-01-06 09:47:23,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 09:47:23,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 09:47:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:23,894 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 12 states. [2021-01-06 09:47:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:23,991 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2021-01-06 09:47:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 09:47:23,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2021-01-06 09:47:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:23,995 INFO L225 Difference]: With dead ends: 65 [2021-01-06 09:47:23,996 INFO L226 Difference]: Without dead ends: 40 [2021-01-06 09:47:23,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 09:47:23,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-01-06 09:47:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-01-06 09:47:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-01-06 09:47:24,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2021-01-06 09:47:24,011 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 33 [2021-01-06 09:47:24,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:24,011 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2021-01-06 09:47:24,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 09:47:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2021-01-06 09:47:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 09:47:24,014 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:24,014 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:24,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 09:47:24,228 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:24,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:24,229 INFO L82 PathProgramCache]: Analyzing trace with hash 898112127, now seen corresponding path program 9 times [2021-01-06 09:47:24,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:24,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653818333] [2021-01-06 09:47:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:47:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653818333] [2021-01-06 09:47:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871522669] [2021-01-06 09:47:24,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:24,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 09:47:24,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 09:47:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-01-06 09:47:24,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:24,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 09:47:24,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146590182] [2021-01-06 09:47:24,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 09:47:24,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:24,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 09:47:24,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:24,626 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 13 states. [2021-01-06 09:47:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:24,714 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-01-06 09:47:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 09:47:24,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2021-01-06 09:47:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:24,720 INFO L225 Difference]: With dead ends: 70 [2021-01-06 09:47:24,720 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 09:47:24,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 09:47:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 09:47:24,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-01-06 09:47:24,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 09:47:24,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-01-06 09:47:24,739 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 36 [2021-01-06 09:47:24,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:24,739 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-01-06 09:47:24,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 09:47:24,739 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-01-06 09:47:24,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 09:47:24,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:24,740 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:24,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:24,942 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:24,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1470539586, now seen corresponding path program 10 times [2021-01-06 09:47:24,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:24,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774069921] [2021-01-06 09:47:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 09:47:25,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774069921] [2021-01-06 09:47:25,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345395989] [2021-01-06 09:47:25,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:25,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:25,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 09:47:25,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-01-06 09:47:25,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:25,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 09:47:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95953761] [2021-01-06 09:47:25,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 09:47:25,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 09:47:25,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:25,277 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2021-01-06 09:47:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:25,357 INFO L93 Difference]: Finished difference Result 75 states and 80 transitions. [2021-01-06 09:47:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 09:47:25,358 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 39 [2021-01-06 09:47:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:25,359 INFO L225 Difference]: With dead ends: 75 [2021-01-06 09:47:25,359 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 09:47:25,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 09:47:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 09:47:25,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-01-06 09:47:25,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-01-06 09:47:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2021-01-06 09:47:25,369 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 39 [2021-01-06 09:47:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:25,369 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2021-01-06 09:47:25,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 09:47:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2021-01-06 09:47:25,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 09:47:25,370 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:25,370 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:25,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:25,577 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:25,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:25,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1909879899, now seen corresponding path program 11 times [2021-01-06 09:47:25,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:25,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137953597] [2021-01-06 09:47:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-01-06 09:47:25,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137953597] [2021-01-06 09:47:25,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273196889] [2021-01-06 09:47:25,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:29,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 09:47:29,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:29,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 09:47:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-01-06 09:47:29,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:29,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 09:47:29,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550820763] [2021-01-06 09:47:29,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 09:47:29,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:29,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 09:47:29,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:29,449 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 15 states. [2021-01-06 09:47:29,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:29,523 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-01-06 09:47:29,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 09:47:29,523 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2021-01-06 09:47:29,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:29,524 INFO L225 Difference]: With dead ends: 80 [2021-01-06 09:47:29,524 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 09:47:29,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 09:47:29,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 09:47:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 09:47:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 09:47:29,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-01-06 09:47:29,529 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 42 [2021-01-06 09:47:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:29,530 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-01-06 09:47:29,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 09:47:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-01-06 09:47:29,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 09:47:29,531 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:29,531 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 09:47:29,745 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1813633630, now seen corresponding path program 12 times [2021-01-06 09:47:29,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:29,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443926220] [2021-01-06 09:47:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 09:47:29,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443926220] [2021-01-06 09:47:29,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676396381] [2021-01-06 09:47:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:31,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 09:47:31,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:31,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 09:47:31,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-01-06 09:47:31,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:31,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 09:47:31,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911797124] [2021-01-06 09:47:31,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 09:47:31,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:31,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 09:47:31,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:31,573 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 16 states. [2021-01-06 09:47:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:31,654 INFO L93 Difference]: Finished difference Result 85 states and 90 transitions. [2021-01-06 09:47:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 09:47:31,654 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2021-01-06 09:47:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:31,655 INFO L225 Difference]: With dead ends: 85 [2021-01-06 09:47:31,655 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 09:47:31,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 09:47:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 09:47:31,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-01-06 09:47:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 09:47:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-01-06 09:47:31,661 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 45 [2021-01-06 09:47:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:31,662 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-01-06 09:47:31,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 09:47:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-01-06 09:47:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 09:47:31,663 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:31,663 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:31,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 09:47:31,879 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:31,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1694926903, now seen corresponding path program 13 times [2021-01-06 09:47:31,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:31,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471769401] [2021-01-06 09:47:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 09:47:32,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471769401] [2021-01-06 09:47:32,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795935413] [2021-01-06 09:47:32,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 09:47:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:32,317 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 09:47:32,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:32,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 09:47:32,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328577134] [2021-01-06 09:47:32,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 09:47:32,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:32,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 09:47:32,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:32,320 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 17 states. [2021-01-06 09:47:32,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:32,415 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-01-06 09:47:32,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 09:47:32,416 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2021-01-06 09:47:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:32,416 INFO L225 Difference]: With dead ends: 90 [2021-01-06 09:47:32,417 INFO L226 Difference]: Without dead ends: 55 [2021-01-06 09:47:32,418 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 09:47:32,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-01-06 09:47:32,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-01-06 09:47:32,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 09:47:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-01-06 09:47:32,423 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 48 [2021-01-06 09:47:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:32,423 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-01-06 09:47:32,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 09:47:32,424 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-01-06 09:47:32,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 09:47:32,424 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:32,425 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:32,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 09:47:32,636 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1762596730, now seen corresponding path program 14 times [2021-01-06 09:47:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:32,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237188231] [2021-01-06 09:47:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:47:32,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237188231] [2021-01-06 09:47:32,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430292324] [2021-01-06 09:47:32,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:32,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:47:32,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 09:47:32,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 09:47:32,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:32,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 09:47:32,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277703468] [2021-01-06 09:47:32,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 09:47:32,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:32,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 09:47:32,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:32,993 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 18 states. [2021-01-06 09:47:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:33,097 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-01-06 09:47:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 09:47:33,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2021-01-06 09:47:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:33,098 INFO L225 Difference]: With dead ends: 95 [2021-01-06 09:47:33,098 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 09:47:33,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 09:47:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 09:47:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-01-06 09:47:33,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 09:47:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2021-01-06 09:47:33,104 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 51 [2021-01-06 09:47:33,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:33,105 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2021-01-06 09:47:33,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 09:47:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2021-01-06 09:47:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 09:47:33,106 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:33,106 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:33,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:33,321 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:33,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:33,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1979361773, now seen corresponding path program 15 times [2021-01-06 09:47:33,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:33,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476863573] [2021-01-06 09:47:33,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:47:33,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476863573] [2021-01-06 09:47:33,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077011646] [2021-01-06 09:47:33,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:34,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 09:47:34,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:34,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 09:47:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:34,711 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-01-06 09:47:34,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:34,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 09:47:34,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454344068] [2021-01-06 09:47:34,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 09:47:34,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:34,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 09:47:34,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:34,715 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 19 states. [2021-01-06 09:47:34,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:34,819 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-01-06 09:47:34,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 09:47:34,819 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 54 [2021-01-06 09:47:34,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:34,820 INFO L225 Difference]: With dead ends: 100 [2021-01-06 09:47:34,820 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 09:47:34,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 09:47:34,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 09:47:34,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-01-06 09:47:34,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 09:47:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-01-06 09:47:34,825 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 54 [2021-01-06 09:47:34,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:34,826 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-01-06 09:47:34,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 09:47:34,826 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-01-06 09:47:34,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 09:47:34,827 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:34,827 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:35,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 09:47:35,037 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:35,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:35,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1574395542, now seen corresponding path program 16 times [2021-01-06 09:47:35,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:35,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049954205] [2021-01-06 09:47:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 09:47:35,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049954205] [2021-01-06 09:47:35,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57616902] [2021-01-06 09:47:35,277 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:47:35,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:47:35,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:47:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 09:47:35,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:47:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2021-01-06 09:47:35,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:47:35,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 09:47:35,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276865519] [2021-01-06 09:47:35,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 09:47:35,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:47:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 09:47:35,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:35,453 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 20 states. [2021-01-06 09:47:35,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:47:35,535 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-01-06 09:47:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 09:47:35,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 57 [2021-01-06 09:47:35,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:47:35,536 INFO L225 Difference]: With dead ends: 105 [2021-01-06 09:47:35,536 INFO L226 Difference]: Without dead ends: 64 [2021-01-06 09:47:35,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 09:47:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-01-06 09:47:35,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-01-06 09:47:35,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 09:47:35,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-01-06 09:47:35,548 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2021-01-06 09:47:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:47:35,548 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-01-06 09:47:35,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 09:47:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-01-06 09:47:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 09:47:35,549 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:47:35,549 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:47:35,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 09:47:35,763 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:47:35,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:47:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1908399599, now seen corresponding path program 17 times [2021-01-06 09:47:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:47:35,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683008995] [2021-01-06 09:47:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:47:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:47:36,007 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 09:47:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683008995] [2021-01-06 09:47:36,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490065243] [2021-01-06 09:47:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:12,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 09:48:12,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:12,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 09:48:12,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:12,810 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-01-06 09:48:12,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:12,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 09:48:12,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74570744] [2021-01-06 09:48:12,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 09:48:12,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:12,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 09:48:12,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:48:12,812 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 21 states. [2021-01-06 09:48:12,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:12,925 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-01-06 09:48:12,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 09:48:12,925 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2021-01-06 09:48:12,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:12,926 INFO L225 Difference]: With dead ends: 110 [2021-01-06 09:48:12,926 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 09:48:12,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 09:48:12,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 09:48:12,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2021-01-06 09:48:12,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 09:48:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-01-06 09:48:12,931 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 60 [2021-01-06 09:48:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:12,932 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-01-06 09:48:12,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 09:48:12,932 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-01-06 09:48:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 09:48:12,932 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:12,933 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:13,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 09:48:13,146 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:13,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:13,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1530679374, now seen corresponding path program 18 times [2021-01-06 09:48:13,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:13,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849500347] [2021-01-06 09:48:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 09:48:13,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849500347] [2021-01-06 09:48:13,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059123248] [2021-01-06 09:48:13,466 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 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 09:48:23,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 09:48:23,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 09:48:23,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:23,179 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-01-06 09:48:23,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:23,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 09:48:23,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106367763] [2021-01-06 09:48:23,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 09:48:23,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 09:48:23,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:48:23,185 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 22 states. [2021-01-06 09:48:23,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:23,302 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-01-06 09:48:23,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 09:48:23,302 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 63 [2021-01-06 09:48:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:23,304 INFO L225 Difference]: With dead ends: 115 [2021-01-06 09:48:23,304 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 09:48:23,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 09:48:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 09:48:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-01-06 09:48:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 09:48:23,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2021-01-06 09:48:23,320 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 63 [2021-01-06 09:48:23,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:23,320 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2021-01-06 09:48:23,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 09:48:23,320 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2021-01-06 09:48:23,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 09:48:23,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:23,321 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:23,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:23,534 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:23,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:23,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1663246283, now seen corresponding path program 19 times [2021-01-06 09:48:23,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:23,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379378153] [2021-01-06 09:48:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:23,880 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 09:48:23,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379378153] [2021-01-06 09:48:23,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060549760] [2021-01-06 09:48:23,881 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 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 09:48:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:23,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 09:48:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-01-06 09:48:24,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:24,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 09:48:24,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623049024] [2021-01-06 09:48:24,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 09:48:24,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:24,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 09:48:24,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:48:24,056 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 23 states. [2021-01-06 09:48:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:24,188 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2021-01-06 09:48:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 09:48:24,189 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 66 [2021-01-06 09:48:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:24,191 INFO L225 Difference]: With dead ends: 120 [2021-01-06 09:48:24,191 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 09:48:24,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 09:48:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 09:48:24,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 09:48:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 09:48:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-01-06 09:48:24,197 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 66 [2021-01-06 09:48:24,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:24,197 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-01-06 09:48:24,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 09:48:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-01-06 09:48:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 09:48:24,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:24,199 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:24,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:24,413 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:24,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:24,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1020982578, now seen corresponding path program 20 times [2021-01-06 09:48:24,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:24,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040617255] [2021-01-06 09:48:24,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 09:48:24,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040617255] [2021-01-06 09:48:24,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699791687] [2021-01-06 09:48:24,759 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 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 09:48:24,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 09:48:24,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:24,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 09:48:24,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2021-01-06 09:48:24,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:24,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 09:48:24,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813092455] [2021-01-06 09:48:24,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 09:48:24,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:24,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 09:48:24,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:48:24,933 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 24 states. [2021-01-06 09:48:25,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:25,063 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-01-06 09:48:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 09:48:25,064 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 69 [2021-01-06 09:48:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:25,065 INFO L225 Difference]: With dead ends: 125 [2021-01-06 09:48:25,065 INFO L226 Difference]: Without dead ends: 76 [2021-01-06 09:48:25,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 09:48:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-01-06 09:48:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-01-06 09:48:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 09:48:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-01-06 09:48:25,071 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2021-01-06 09:48:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:25,071 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-01-06 09:48:25,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 09:48:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-01-06 09:48:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 09:48:25,072 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:25,072 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:25,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 09:48:25,286 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:25,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:25,287 INFO L82 PathProgramCache]: Analyzing trace with hash -82043993, now seen corresponding path program 21 times [2021-01-06 09:48:25,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:25,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129753493] [2021-01-06 09:48:25,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:48:25,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129753493] [2021-01-06 09:48:25,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007233515] [2021-01-06 09:48:25,641 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 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 09:48:33,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-01-06 09:48:33,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:33,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 09:48:33,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2021-01-06 09:48:33,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:33,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 09:48:33,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962551659] [2021-01-06 09:48:33,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 09:48:33,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 09:48:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:48:33,118 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 25 states. [2021-01-06 09:48:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:33,251 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2021-01-06 09:48:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 09:48:33,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 72 [2021-01-06 09:48:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:33,253 INFO L225 Difference]: With dead ends: 130 [2021-01-06 09:48:33,253 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 09:48:33,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 09:48:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 09:48:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 09:48:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 09:48:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-01-06 09:48:33,257 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 72 [2021-01-06 09:48:33,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:33,258 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-01-06 09:48:33,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 09:48:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-01-06 09:48:33,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 09:48:33,259 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:33,259 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:33,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 09:48:33,473 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:33,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:33,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1229746154, now seen corresponding path program 22 times [2021-01-06 09:48:33,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:33,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119179457] [2021-01-06 09:48:33,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-01-06 09:48:33,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119179457] [2021-01-06 09:48:33,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071747305] [2021-01-06 09:48:33,916 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 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 09:48:34,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 09:48:34,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:48:34,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 09:48:34,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:48:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 09:48:34,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:48:34,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 09:48:34,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468695440] [2021-01-06 09:48:34,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 09:48:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:48:34,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 09:48:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:48:34,123 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 26 states. [2021-01-06 09:48:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:48:34,263 INFO L93 Difference]: Finished difference Result 135 states and 140 transitions. [2021-01-06 09:48:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 09:48:34,263 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2021-01-06 09:48:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:48:34,264 INFO L225 Difference]: With dead ends: 135 [2021-01-06 09:48:34,264 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 09:48:34,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 09:48:34,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 09:48:34,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-01-06 09:48:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 09:48:34,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2021-01-06 09:48:34,269 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 75 [2021-01-06 09:48:34,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:48:34,269 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2021-01-06 09:48:34,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 09:48:34,269 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2021-01-06 09:48:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 09:48:34,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:48:34,270 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:48:34,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 09:48:34,486 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:48:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:48:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -862465661, now seen corresponding path program 23 times [2021-01-06 09:48:34,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:48:34,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035617706] [2021-01-06 09:48:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:48:34,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:48:34,957 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:48:34,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035617706] [2021-01-06 09:48:34,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962281898] [2021-01-06 09:48:34,958 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 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 09:51:46,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 09:51:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 09:51:46,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 09:51:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 09:51:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2021-01-06 09:51:46,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 09:51:46,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 09:51:46,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388749053] [2021-01-06 09:51:46,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 09:51:46,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 09:51:46,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 09:51:46,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:51:46,791 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 27 states. [2021-01-06 09:51:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 09:51:46,940 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2021-01-06 09:51:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 09:51:46,941 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2021-01-06 09:51:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 09:51:46,941 INFO L225 Difference]: With dead ends: 140 [2021-01-06 09:51:46,941 INFO L226 Difference]: Without dead ends: 85 [2021-01-06 09:51:46,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 09:51:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-01-06 09:51:46,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-01-06 09:51:46,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-01-06 09:51:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2021-01-06 09:51:46,945 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 78 [2021-01-06 09:51:46,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 09:51:46,946 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2021-01-06 09:51:46,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 09:51:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2021-01-06 09:51:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 09:51:46,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 09:51:46,947 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 09:51:47,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 09:51:47,163 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 09:51:47,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 09:51:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1299521786, now seen corresponding path program 24 times [2021-01-06 09:51:47,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 09:51:47,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714558985] [2021-01-06 09:51:47,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 09:51:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 09:51:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 09:51:47,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714558985] [2021-01-06 09:51:47,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791747252] [2021-01-06 09:51:47,641 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 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