/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-industry-pattern/array_ptr_single_elem_init-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:06:37,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:06:37,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:06:37,592 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 10:06:37,593 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 10:06:37,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 10:06:37,601 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 10:06:37,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 10:06:37,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 10:06:37,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 10:06:37,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 10:06:37,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 10:06:37,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:06:37,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:06:37,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:06:37,630 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:06:37,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:06:37,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:06:37,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:06:37,654 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:06:37,661 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:06:37,663 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:06:37,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:06:37,668 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:06:37,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:06:37,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:06:37,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:06:37,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:06:37,699 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 10:06:37,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:06:37,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:06:37,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:06:37,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:06:37,728 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:06:37,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:06:37,728 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:06:37,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:06:37,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:06:37,729 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:06:37,729 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:06:37,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:06:37,730 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:06:37,730 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:06:37,730 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:06:37,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:06:37,731 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:06:37,731 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:06:37,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:06:37,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:06:37,732 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:06:37,732 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:06:37,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:06:37,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:06:37,733 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:06:37,733 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:06:38,120 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:06:38,163 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:06:38,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:06:38,168 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:06:38,169 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:06:38,170 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2021-01-06 10:06:38,257 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ea8888427/35fb2c5c5c934e338c07eda72457678c/FLAG43a640774 [2021-01-06 10:06:38,844 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:06:38,845 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_ptr_single_elem_init-1.i [2021-01-06 10:06:38,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ea8888427/35fb2c5c5c934e338c07eda72457678c/FLAG43a640774 [2021-01-06 10:06:39,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ea8888427/35fb2c5c5c934e338c07eda72457678c [2021-01-06 10:06:39,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:06:39,201 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:06:39,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:06:39,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:06:39,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:06:39,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6612ab50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39, skipping insertion in model container [2021-01-06 10:06:39,214 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:06:39,242 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 10:06:39,401 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-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IdentifierExpression[~i~0,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~a~0,GLOBAL],[IntegerLiteral[3]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:06:39,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:06:39,442 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 10:06:39,458 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-industry-pattern/array_ptr_single_elem_init-1.i[998,1011] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~s~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[8],StructAccessExpression[IdentifierExpression[~s~0,],offset]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~s~0,],base],StructAccessExpression[IdentifierExpression[~s~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset],BinaryExpression[ARITHMUL,IntegerLiteral[8],IdentifierExpression[~i~0,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],base],BinaryExpression[ARITHPLUS,IntegerLiteral[24],StructAccessExpression[IdentifierExpression[~#a~0,GLOBAL],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~i~0,] [2021-01-06 10:06:39,468 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:06:39,488 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:06:39,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39 WrapperNode [2021-01-06 10:06:39,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:06:39,490 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:06:39,491 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:06:39,491 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:06:39,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:06:39,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:06:39,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:06:39,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:06:39,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,551 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,551 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (1/1) ... [2021-01-06 10:06:39,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:06:39,569 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:06:39,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:06:39,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:06:39,571 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (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 10:06:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-01-06 10:06:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:06:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-01-06 10:06:39,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:06:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:06:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-01-06 10:06:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:06:39,679 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:06:39,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:06:40,238 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:06:40,238 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-01-06 10:06:40,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:06:40 BoogieIcfgContainer [2021-01-06 10:06:40,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:06:40,247 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:06:40,247 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:06:40,251 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:06:40,251 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:06:39" (1/3) ... [2021-01-06 10:06:40,253 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57003f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:06:40, skipping insertion in model container [2021-01-06 10:06:40,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:06:39" (2/3) ... [2021-01-06 10:06:40,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57003f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:06:40, skipping insertion in model container [2021-01-06 10:06:40,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:06:40" (3/3) ... [2021-01-06 10:06:40,255 INFO L111 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-1.i [2021-01-06 10:06:40,267 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:06:40,274 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:06:40,295 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:06:40,339 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:06:40,339 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:06:40,339 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:06:40,339 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:06:40,339 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:06:40,340 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:06:40,340 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:06:40,340 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:06:40,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2021-01-06 10:06:40,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:06:40,369 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:40,370 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:40,371 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:40,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash -739796340, now seen corresponding path program 1 times [2021-01-06 10:06:40,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:40,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105160690] [2021-01-06 10:06:40,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:40,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:40,626 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 10:06:40,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105160690] [2021-01-06 10:06:40,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:06:40,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 10:06:40,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195479932] [2021-01-06 10:06:40,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 10:06:40,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 10:06:40,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:06:40,660 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2021-01-06 10:06:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:40,682 INFO L93 Difference]: Finished difference Result 34 states and 47 transitions. [2021-01-06 10:06:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 10:06:40,684 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2021-01-06 10:06:40,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:40,698 INFO L225 Difference]: With dead ends: 34 [2021-01-06 10:06:40,698 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 10:06:40,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 10:06:40,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 10:06:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 10:06:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 10:06:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-01-06 10:06:40,749 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 9 [2021-01-06 10:06:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:40,750 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-01-06 10:06:40,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 10:06:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-01-06 10:06:40,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 10:06:40,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:40,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:40,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:06:40,754 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:40,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1452551885, now seen corresponding path program 1 times [2021-01-06 10:06:40,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:40,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351765706] [2021-01-06 10:06:40,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:40,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:40,856 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 10:06:40,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351765706] [2021-01-06 10:06:40,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:06:40,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:06:40,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503463448] [2021-01-06 10:06:40,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:06:40,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:06:40,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:06:40,860 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand 3 states. [2021-01-06 10:06:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:40,914 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2021-01-06 10:06:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:06:40,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2021-01-06 10:06:40,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:40,916 INFO L225 Difference]: With dead ends: 40 [2021-01-06 10:06:40,916 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:06:40,917 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 10:06:40,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:06:40,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 18. [2021-01-06 10:06:40,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-01-06 10:06:40,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-01-06 10:06:40,924 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 9 [2021-01-06 10:06:40,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:40,924 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-01-06 10:06:40,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:06:40,924 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-01-06 10:06:40,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:06:40,925 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:40,925 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:40,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 10:06:40,926 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:40,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:40,927 INFO L82 PathProgramCache]: Analyzing trace with hash 479393663, now seen corresponding path program 1 times [2021-01-06 10:06:40,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:40,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134630791] [2021-01-06 10:06:40,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:40,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134630791] [2021-01-06 10:06:40,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:06:40,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:06:40,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914841049] [2021-01-06 10:06:40,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:06:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:40,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:06:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:06:40,994 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand 3 states. [2021-01-06 10:06:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:41,045 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2021-01-06 10:06:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:06:41,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 10:06:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:41,047 INFO L225 Difference]: With dead ends: 47 [2021-01-06 10:06:41,047 INFO L226 Difference]: Without dead ends: 32 [2021-01-06 10:06:41,048 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 10:06:41,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-01-06 10:06:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 19. [2021-01-06 10:06:41,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 10:06:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-01-06 10:06:41,053 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2021-01-06 10:06:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:41,053 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-01-06 10:06:41,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:06:41,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-01-06 10:06:41,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:06:41,055 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:41,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:41,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 10:06:41,055 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:41,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:41,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1180458241, now seen corresponding path program 1 times [2021-01-06 10:06:41,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:41,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490704984] [2021-01-06 10:06:41,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:41,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490704984] [2021-01-06 10:06:41,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987140063] [2021-01-06 10:06:41,132 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 10:06:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:06:41,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 10:06:41,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:06:41,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:06:41,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142446394] [2021-01-06 10:06:41,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:06:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:41,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:06:41,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:06:41,371 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand 3 states. [2021-01-06 10:06:41,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:41,396 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-01-06 10:06:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:06:41,397 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 10:06:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:41,399 INFO L225 Difference]: With dead ends: 28 [2021-01-06 10:06:41,399 INFO L226 Difference]: Without dead ends: 20 [2021-01-06 10:06:41,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:06:41,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-01-06 10:06:41,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-01-06 10:06:41,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-01-06 10:06:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-01-06 10:06:41,409 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 14 [2021-01-06 10:06:41,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:41,409 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-01-06 10:06:41,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:06:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2021-01-06 10:06:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 10:06:41,411 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:41,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:41,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:41,626 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:41,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:41,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1180398659, now seen corresponding path program 1 times [2021-01-06 10:06:41,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:41,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639677900] [2021-01-06 10:06:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:41,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639677900] [2021-01-06 10:06:41,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724235999] [2021-01-06 10:06:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:41,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:41,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:06:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:41,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:41,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:06:41,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331407118] [2021-01-06 10:06:41,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:06:41,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:41,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:06:41,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:06:41,826 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand 5 states. [2021-01-06 10:06:41,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:41,886 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2021-01-06 10:06:41,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:06:41,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2021-01-06 10:06:41,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:41,888 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:06:41,888 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 10:06:41,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:06:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 10:06:41,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 27. [2021-01-06 10:06:41,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:06:41,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2021-01-06 10:06:41,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 14 [2021-01-06 10:06:41,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:41,895 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2021-01-06 10:06:41,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:06:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2021-01-06 10:06:41,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:06:41,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:41,896 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:42,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:42,110 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:42,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:42,112 INFO L82 PathProgramCache]: Analyzing trace with hash -795862731, now seen corresponding path program 2 times [2021-01-06 10:06:42,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:42,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306172244] [2021-01-06 10:06:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:42,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306172244] [2021-01-06 10:06:42,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99381935] [2021-01-06 10:06:42,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:42,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:42,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:42,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:06:42,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:42,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:42,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 10:06:42,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600872035] [2021-01-06 10:06:42,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:06:42,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:42,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:06:42,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:06:42,315 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand 6 states. [2021-01-06 10:06:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:42,361 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2021-01-06 10:06:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 10:06:42,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2021-01-06 10:06:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:42,363 INFO L225 Difference]: With dead ends: 77 [2021-01-06 10:06:42,363 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 10:06:42,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:06:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 10:06:42,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 34. [2021-01-06 10:06:42,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-01-06 10:06:42,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2021-01-06 10:06:42,370 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 19 [2021-01-06 10:06:42,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:42,370 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2021-01-06 10:06:42,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:06:42,370 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2021-01-06 10:06:42,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 10:06:42,371 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:42,371 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:42,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:42,586 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash -23676029, now seen corresponding path program 3 times [2021-01-06 10:06:42,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:42,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455775865] [2021-01-06 10:06:42,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:42,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455775865] [2021-01-06 10:06:42,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220993502] [2021-01-06 10:06:42,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:42,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:06:42,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:06:42,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:42,782 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:42,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:42,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:06:42,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008806776] [2021-01-06 10:06:42,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:06:42,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:42,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:06:42,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:06:42,785 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand 7 states. [2021-01-06 10:06:42,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:42,841 INFO L93 Difference]: Finished difference Result 93 states and 122 transitions. [2021-01-06 10:06:42,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:06:42,842 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2021-01-06 10:06:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:42,843 INFO L225 Difference]: With dead ends: 93 [2021-01-06 10:06:42,843 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 10:06:42,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:06:42,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 10:06:42,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 41. [2021-01-06 10:06:42,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 10:06:42,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 56 transitions. [2021-01-06 10:06:42,851 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 56 transitions. Word has length 24 [2021-01-06 10:06:42,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:42,851 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 56 transitions. [2021-01-06 10:06:42,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:06:42,851 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 56 transitions. [2021-01-06 10:06:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:06:42,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:42,853 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:43,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:43,066 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:43,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1702929931, now seen corresponding path program 4 times [2021-01-06 10:06:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:43,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474422407] [2021-01-06 10:06:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474422407] [2021-01-06 10:06:43,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197804548] [2021-01-06 10:06:43,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:43,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:06:43,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:43,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:43,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 10:06:43,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336703678] [2021-01-06 10:06:43,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:06:43,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:43,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:06:43,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:06:43,344 INFO L87 Difference]: Start difference. First operand 41 states and 56 transitions. Second operand 8 states. [2021-01-06 10:06:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:43,434 INFO L93 Difference]: Finished difference Result 109 states and 143 transitions. [2021-01-06 10:06:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 10:06:43,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2021-01-06 10:06:43,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:43,440 INFO L225 Difference]: With dead ends: 109 [2021-01-06 10:06:43,440 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 10:06:43,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:06:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 10:06:43,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 48. [2021-01-06 10:06:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:06:43,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 66 transitions. [2021-01-06 10:06:43,452 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 66 transitions. Word has length 29 [2021-01-06 10:06:43,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:43,452 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 66 transitions. [2021-01-06 10:06:43,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:06:43,452 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 66 transitions. [2021-01-06 10:06:43,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 10:06:43,454 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:43,454 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:43,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:43,657 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:43,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:43,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1882066237, now seen corresponding path program 5 times [2021-01-06 10:06:43,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:43,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187344199] [2021-01-06 10:06:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:43,751 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187344199] [2021-01-06 10:06:43,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140998648] [2021-01-06 10:06:43,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:43,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 10:06:43,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:06:43,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:43,976 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:43,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:43,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 10:06:43,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975515866] [2021-01-06 10:06:43,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 10:06:43,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:43,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 10:06:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:06:43,979 INFO L87 Difference]: Start difference. First operand 48 states and 66 transitions. Second operand 9 states. [2021-01-06 10:06:44,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:44,049 INFO L93 Difference]: Finished difference Result 125 states and 164 transitions. [2021-01-06 10:06:44,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:06:44,049 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2021-01-06 10:06:44,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:44,050 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:06:44,051 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 10:06:44,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 10:06:44,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 10:06:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 55. [2021-01-06 10:06:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 10:06:44,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2021-01-06 10:06:44,058 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 34 [2021-01-06 10:06:44,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:44,059 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2021-01-06 10:06:44,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 10:06:44,059 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2021-01-06 10:06:44,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 10:06:44,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:44,060 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:44,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:44,274 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:44,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:44,275 INFO L82 PathProgramCache]: Analyzing trace with hash -572216651, now seen corresponding path program 6 times [2021-01-06 10:06:44,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:44,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906443770] [2021-01-06 10:06:44,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:44,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906443770] [2021-01-06 10:06:44,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623869367] [2021-01-06 10:06:44,392 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:44,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 10:06:44,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:44,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:06:44,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:44,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:44,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:06:44,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619012308] [2021-01-06 10:06:44,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:06:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:44,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:06:44,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:06:44,696 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 10 states. [2021-01-06 10:06:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:44,788 INFO L93 Difference]: Finished difference Result 141 states and 185 transitions. [2021-01-06 10:06:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:06:44,788 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2021-01-06 10:06:44,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:44,790 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:06:44,790 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:06:44,791 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:06:44,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:06:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 62. [2021-01-06 10:06:44,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:06:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2021-01-06 10:06:44,797 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 39 [2021-01-06 10:06:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:44,798 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2021-01-06 10:06:44,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:06:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2021-01-06 10:06:44,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-01-06 10:06:44,799 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:44,799 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:45,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 10:06:45,015 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:45,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1860246019, now seen corresponding path program 7 times [2021-01-06 10:06:45,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:45,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016522460] [2021-01-06 10:06:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:45,210 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016522460] [2021-01-06 10:06:45,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674715014] [2021-01-06 10:06:45,211 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 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 10:06:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:45,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:06:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:45,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:45,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:06:45,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310291038] [2021-01-06 10:06:45,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:06:45,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:45,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:06:45,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:06:45,375 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 11 states. [2021-01-06 10:06:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:45,473 INFO L93 Difference]: Finished difference Result 157 states and 206 transitions. [2021-01-06 10:06:45,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:06:45,474 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2021-01-06 10:06:45,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:45,475 INFO L225 Difference]: With dead ends: 157 [2021-01-06 10:06:45,476 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 10:06:45,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:06:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 10:06:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 69. [2021-01-06 10:06:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 10:06:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 96 transitions. [2021-01-06 10:06:45,482 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 96 transitions. Word has length 44 [2021-01-06 10:06:45,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:45,483 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 96 transitions. [2021-01-06 10:06:45,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:06:45,483 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 96 transitions. [2021-01-06 10:06:45,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-01-06 10:06:45,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:45,485 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:45,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 10:06:45,700 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 174852981, now seen corresponding path program 8 times [2021-01-06 10:06:45,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:45,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732444143] [2021-01-06 10:06:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:45,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732444143] [2021-01-06 10:06:45,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318327285] [2021-01-06 10:06:45,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:45,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:45,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:06:45,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:46,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:46,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 10:06:46,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588361742] [2021-01-06 10:06:46,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 10:06:46,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:46,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 10:06:46,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:06:46,013 INFO L87 Difference]: Start difference. First operand 69 states and 96 transitions. Second operand 12 states. [2021-01-06 10:06:46,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:46,146 INFO L93 Difference]: Finished difference Result 173 states and 227 transitions. [2021-01-06 10:06:46,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:06:46,147 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2021-01-06 10:06:46,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:46,148 INFO L225 Difference]: With dead ends: 173 [2021-01-06 10:06:46,148 INFO L226 Difference]: Without dead ends: 163 [2021-01-06 10:06:46,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 10:06:46,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-01-06 10:06:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2021-01-06 10:06:46,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:06:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2021-01-06 10:06:46,155 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 49 [2021-01-06 10:06:46,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:46,156 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2021-01-06 10:06:46,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 10:06:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2021-01-06 10:06:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 10:06:46,157 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:46,157 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:46,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:46,371 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 395850051, now seen corresponding path program 9 times [2021-01-06 10:06:46,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:46,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29791133] [2021-01-06 10:06:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:46,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29791133] [2021-01-06 10:06:46,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339909912] [2021-01-06 10:06:46,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:47,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:06:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:06:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:47,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:47,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:06:47,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46008931] [2021-01-06 10:06:47,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:06:47,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:47,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:06:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:06:47,424 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand 13 states. [2021-01-06 10:06:47,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:47,553 INFO L93 Difference]: Finished difference Result 189 states and 248 transitions. [2021-01-06 10:06:47,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:06:47,554 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 54 [2021-01-06 10:06:47,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:47,555 INFO L225 Difference]: With dead ends: 189 [2021-01-06 10:06:47,556 INFO L226 Difference]: Without dead ends: 179 [2021-01-06 10:06:47,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:06:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-01-06 10:06:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 83. [2021-01-06 10:06:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 10:06:47,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 116 transitions. [2021-01-06 10:06:47,563 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 116 transitions. Word has length 54 [2021-01-06 10:06:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:47,563 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 116 transitions. [2021-01-06 10:06:47,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:06:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 116 transitions. [2021-01-06 10:06:47,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:06:47,565 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:47,565 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:47,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:47,778 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:47,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash -389972939, now seen corresponding path program 10 times [2021-01-06 10:06:47,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:47,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446794835] [2021-01-06 10:06:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:47,982 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:47,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446794835] [2021-01-06 10:06:48,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206482301] [2021-01-06 10:06:48,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:48,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:06:48,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:06:48,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:48,379 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:48,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:48,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:06:48,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220978724] [2021-01-06 10:06:48,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:06:48,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:48,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:06:48,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:06:48,384 INFO L87 Difference]: Start difference. First operand 83 states and 116 transitions. Second operand 14 states. [2021-01-06 10:06:48,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:48,517 INFO L93 Difference]: Finished difference Result 205 states and 269 transitions. [2021-01-06 10:06:48,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:06:48,517 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 59 [2021-01-06 10:06:48,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:48,519 INFO L225 Difference]: With dead ends: 205 [2021-01-06 10:06:48,519 INFO L226 Difference]: Without dead ends: 195 [2021-01-06 10:06:48,519 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 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 10:06:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-01-06 10:06:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 90. [2021-01-06 10:06:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:06:48,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2021-01-06 10:06:48,525 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2021-01-06 10:06:48,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:48,525 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2021-01-06 10:06:48,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:06:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2021-01-06 10:06:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-01-06 10:06:48,527 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:48,527 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:48,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:06:48,741 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:48,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:48,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1288386691, now seen corresponding path program 11 times [2021-01-06 10:06:48,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:48,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322688334] [2021-01-06 10:06:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322688334] [2021-01-06 10:06:48,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923784373] [2021-01-06 10:06:48,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:49,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 10:06:49,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:06:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:49,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:49,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 10:06:49,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949246602] [2021-01-06 10:06:49,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:06:49,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:06:49,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:06:49,644 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 15 states. [2021-01-06 10:06:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:49,786 INFO L93 Difference]: Finished difference Result 221 states and 290 transitions. [2021-01-06 10:06:49,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 10:06:49,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 64 [2021-01-06 10:06:49,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:49,788 INFO L225 Difference]: With dead ends: 221 [2021-01-06 10:06:49,788 INFO L226 Difference]: Without dead ends: 211 [2021-01-06 10:06:49,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 64 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 10:06:49,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-01-06 10:06:49,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 97. [2021-01-06 10:06:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 10:06:49,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2021-01-06 10:06:49,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 64 [2021-01-06 10:06:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:49,795 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2021-01-06 10:06:49,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:06:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2021-01-06 10:06:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:06:49,796 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:49,796 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:50,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 10:06:50,010 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1519451381, now seen corresponding path program 12 times [2021-01-06 10:06:50,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:50,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268048460] [2021-01-06 10:06:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:50,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268048460] [2021-01-06 10:06:50,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395077395] [2021-01-06 10:06:50,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:53,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 10:06:53,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:06:53,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:53,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:53,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:06:53,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445725226] [2021-01-06 10:06:53,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:06:53,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:53,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:06:53,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:06:53,799 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand 16 states. [2021-01-06 10:06:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:53,945 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2021-01-06 10:06:53,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:06:53,946 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 69 [2021-01-06 10:06:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:53,948 INFO L225 Difference]: With dead ends: 237 [2021-01-06 10:06:53,949 INFO L226 Difference]: Without dead ends: 227 [2021-01-06 10:06:53,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:06:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-01-06 10:06:53,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 104. [2021-01-06 10:06:53,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:06:53,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 146 transitions. [2021-01-06 10:06:53,955 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 146 transitions. Word has length 69 [2021-01-06 10:06:53,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:53,955 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 146 transitions. [2021-01-06 10:06:53,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:06:53,955 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 146 transitions. [2021-01-06 10:06:53,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 10:06:53,956 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:53,956 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:54,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:06:54,170 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1481519043, now seen corresponding path program 13 times [2021-01-06 10:06:54,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:54,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858008288] [2021-01-06 10:06:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:54,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858008288] [2021-01-06 10:06:54,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475571382] [2021-01-06 10:06:54,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:54,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:06:54,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:54,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:54,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:06:54,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78132333] [2021-01-06 10:06:54,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:06:54,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:54,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:06:54,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:06:54,629 INFO L87 Difference]: Start difference. First operand 104 states and 146 transitions. Second operand 17 states. [2021-01-06 10:06:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:54,788 INFO L93 Difference]: Finished difference Result 253 states and 332 transitions. [2021-01-06 10:06:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:06:54,789 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 74 [2021-01-06 10:06:54,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:54,791 INFO L225 Difference]: With dead ends: 253 [2021-01-06 10:06:54,791 INFO L226 Difference]: Without dead ends: 243 [2021-01-06 10:06:54,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:06:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-01-06 10:06:54,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2021-01-06 10:06:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2021-01-06 10:06:54,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 156 transitions. [2021-01-06 10:06:54,798 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 156 transitions. Word has length 74 [2021-01-06 10:06:54,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:54,798 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 156 transitions. [2021-01-06 10:06:54,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:06:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 156 transitions. [2021-01-06 10:06:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:06:54,799 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:54,800 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:55,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:55,014 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:55,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:55,015 INFO L82 PathProgramCache]: Analyzing trace with hash 445025717, now seen corresponding path program 14 times [2021-01-06 10:06:55,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:55,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031245515] [2021-01-06 10:06:55,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:55,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031245515] [2021-01-06 10:06:55,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083480701] [2021-01-06 10:06:55,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:06:55,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:06:55,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:06:55,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 10:06:55,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:06:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:55,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:06:55,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 10:06:55,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119453469] [2021-01-06 10:06:55,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 10:06:55,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:06:55,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 10:06:55,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 10:06:55,495 INFO L87 Difference]: Start difference. First operand 111 states and 156 transitions. Second operand 18 states. [2021-01-06 10:06:55,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:06:55,660 INFO L93 Difference]: Finished difference Result 269 states and 353 transitions. [2021-01-06 10:06:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 10:06:55,661 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2021-01-06 10:06:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:06:55,662 INFO L225 Difference]: With dead ends: 269 [2021-01-06 10:06:55,663 INFO L226 Difference]: Without dead ends: 259 [2021-01-06 10:06:55,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 79 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 10:06:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-01-06 10:06:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 118. [2021-01-06 10:06:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2021-01-06 10:06:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2021-01-06 10:06:55,669 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 79 [2021-01-06 10:06:55,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:06:55,669 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2021-01-06 10:06:55,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 10:06:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2021-01-06 10:06:55,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 10:06:55,670 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:06:55,670 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:06:55,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:06:55,884 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:06:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:06:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1257576195, now seen corresponding path program 15 times [2021-01-06 10:06:55,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:06:55,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160163044] [2021-01-06 10:06:55,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:06:55,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:06:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:06:56,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160163044] [2021-01-06 10:06:56,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166063440] [2021-01-06 10:06:56,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:07:16,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 10:07:16,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:07:16,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:16,736 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:16,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:16,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:07:16,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111755523] [2021-01-06 10:07:16,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:07:16,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:16,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:07:16,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:07:16,741 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand 19 states. [2021-01-06 10:07:16,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:16,936 INFO L93 Difference]: Finished difference Result 285 states and 374 transitions. [2021-01-06 10:07:16,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:07:16,936 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 84 [2021-01-06 10:07:16,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:16,938 INFO L225 Difference]: With dead ends: 285 [2021-01-06 10:07:16,938 INFO L226 Difference]: Without dead ends: 275 [2021-01-06 10:07:16,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:07:16,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-01-06 10:07:16,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 125. [2021-01-06 10:07:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2021-01-06 10:07:16,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 176 transitions. [2021-01-06 10:07:16,944 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 176 transitions. Word has length 84 [2021-01-06 10:07:16,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:16,945 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 176 transitions. [2021-01-06 10:07:16,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:07:16,945 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 176 transitions. [2021-01-06 10:07:16,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:07:16,946 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:16,946 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:17,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:07:17,157 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:17,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:17,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2085498485, now seen corresponding path program 16 times [2021-01-06 10:07:17,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:17,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84381735] [2021-01-06 10:07:17,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:17,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84381735] [2021-01-06 10:07:17,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859790340] [2021-01-06 10:07:17,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:07:18,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:07:18,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:07:18,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:07:18,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:07:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:18,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:07:18,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:07:18,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730248916] [2021-01-06 10:07:18,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:07:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:07:18,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:07:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:07:18,559 INFO L87 Difference]: Start difference. First operand 125 states and 176 transitions. Second operand 20 states. [2021-01-06 10:07:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:07:18,769 INFO L93 Difference]: Finished difference Result 301 states and 395 transitions. [2021-01-06 10:07:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:07:18,770 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2021-01-06 10:07:18,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:07:18,772 INFO L225 Difference]: With dead ends: 301 [2021-01-06 10:07:18,772 INFO L226 Difference]: Without dead ends: 291 [2021-01-06 10:07:18,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:07:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-01-06 10:07:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 132. [2021-01-06 10:07:18,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 10:07:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 186 transitions. [2021-01-06 10:07:18,779 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 186 transitions. Word has length 89 [2021-01-06 10:07:18,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:07:18,779 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 186 transitions. [2021-01-06 10:07:18,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:07:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 186 transitions. [2021-01-06 10:07:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-01-06 10:07:18,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:07:18,780 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:07:18,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:07:18,994 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:07:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:07:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1016327747, now seen corresponding path program 17 times [2021-01-06 10:07:18,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:07:18,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231608130] [2021-01-06 10:07:18,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:07:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:07:19,283 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:07:19,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231608130] [2021-01-06 10:07:19,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113010457] [2021-01-06 10:07:19,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:08:04,832 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 10:08:04,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:08:04,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 10:08:04,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:08:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:04,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:08:04,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 10:08:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308747167] [2021-01-06 10:08:04,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 10:08:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:08:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 10:08:04,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 10:08:04,996 INFO L87 Difference]: Start difference. First operand 132 states and 186 transitions. Second operand 21 states. [2021-01-06 10:08:05,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:08:05,224 INFO L93 Difference]: Finished difference Result 317 states and 416 transitions. [2021-01-06 10:08:05,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 10:08:05,224 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 94 [2021-01-06 10:08:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:08:05,226 INFO L225 Difference]: With dead ends: 317 [2021-01-06 10:08:05,226 INFO L226 Difference]: Without dead ends: 307 [2021-01-06 10:08:05,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 94 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 10:08:05,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-01-06 10:08:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 139. [2021-01-06 10:08:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 10:08:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 196 transitions. [2021-01-06 10:08:05,232 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 196 transitions. Word has length 94 [2021-01-06 10:08:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:08:05,233 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 196 transitions. [2021-01-06 10:08:05,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 10:08:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 196 transitions. [2021-01-06 10:08:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:08:05,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:08:05,234 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:08:05,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:08:05,435 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:08:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:08:05,436 INFO L82 PathProgramCache]: Analyzing trace with hash 747888437, now seen corresponding path program 18 times [2021-01-06 10:08:05,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:08:05,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620375205] [2021-01-06 10:08:05,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:08:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:08:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 10:08:05,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620375205] [2021-01-06 10:08:05,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828301784] [2021-01-06 10:08:05,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true