/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-crafted/mapsum1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 10:37:30,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 10:37:30,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 10:37:30,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-01-06 10:37:30,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 10:37:30,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 10:37:30,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 10:37:30,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 10:37:30,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 10:37:30,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 10:37:30,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 10:37:30,755 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 10:37:30,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 10:37:30,776 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 10:37:30,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 10:37:30,778 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 10:37:30,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 10:37:30,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 10:37:30,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 10:37:30,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 10:37:30,794 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 10:37:30,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 10:37:30,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 10:37:30,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 10:37:30,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 10:37:30,823 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 10:37:30,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 10:37:30,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 10:37:30,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 10:37:30,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 10:37:30,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 10:37:30,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 10:37:30,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 10:37:30,825 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 10:37:30,825 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 10:37:30,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 10:37:30,825 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 10:37:30,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 10:37:30,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 10:37:30,826 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 10:37:30,826 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 10:37:30,826 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 10:37:30,826 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 10:37:30,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 10:37:30,827 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 10:37:30,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 10:37:30,827 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 10:37:31,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 10:37:31,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 10:37:31,240 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 10:37:31,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 10:37:31,242 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 10:37:31,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum1.i [2021-01-06 10:37:31,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7126b063e/c800cd35d2174bc4b69f5af60ad5ca86/FLAG8a1cd9f03 [2021-01-06 10:37:31,919 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 10:37:31,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum1.i [2021-01-06 10:37:31,929 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7126b063e/c800cd35d2174bc4b69f5af60ad5ca86/FLAG8a1cd9f03 [2021-01-06 10:37:32,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/7126b063e/c800cd35d2174bc4b69f5af60ad5ca86 [2021-01-06 10:37:32,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 10:37:32,278 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 10:37:32,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 10:37:32,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 10:37:32,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 10:37:32,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f21a99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32, skipping insertion in model container [2021-01-06 10:37:32,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 10:37:32,315 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~1,]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[0]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[1]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IdentifierExpression[~i~2,]]] left hand side expression in assignment: lhs: ArrayLHS[VariableLHS[~x~0,],[IntegerLiteral[99]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:37:32,492 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-crafted/mapsum1.i[1300,1313] [2021-01-06 10:37:32,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:37:32,505 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~ret~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~1,]]]]] left hand side expression in assignment: lhs: VariableLHS[~ret~1,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[4],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret2~0,] left hand side expression in assignment: lhs: VariableLHS[~temp~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,StructAccessExpression[IdentifierExpression[~#x~0,],offset],BinaryExpression[ARITHMUL,IntegerLiteral[4],IdentifierExpression[~i~2,]]]]] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#x~0,],base],BinaryExpression[ARITHPLUS,IntegerLiteral[396],StructAccessExpression[IdentifierExpression[~#x~0,],offset]]]] left hand side expression in assignment: lhs: VariableLHS[~ret5~0,] [2021-01-06 10:37:32,532 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-crafted/mapsum1.i[1300,1313] [2021-01-06 10:37:32,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 10:37:32,551 INFO L208 MainTranslator]: Completed translation [2021-01-06 10:37:32,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32 WrapperNode [2021-01-06 10:37:32,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 10:37:32,553 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 10:37:32,553 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 10:37:32,554 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 10:37:32,563 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,573 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,601 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 10:37:32,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 10:37:32,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 10:37:32,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 10:37:32,613 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (1/1) ... [2021-01-06 10:37:32,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 10:37:32,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 10:37:32,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 10:37:32,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 10:37:32,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (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 10:37:32,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 10:37:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 10:37:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 10:37:32,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 10:37:32,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 10:37:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-01-06 10:37:32,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 10:37:33,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 10:37:33,312 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-01-06 10:37:33,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:37:33 BoogieIcfgContainer [2021-01-06 10:37:33,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 10:37:33,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 10:37:33,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 10:37:33,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 10:37:33,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:37:32" (1/3) ... [2021-01-06 10:37:33,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eec7d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:37:33, skipping insertion in model container [2021-01-06 10:37:33,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:37:32" (2/3) ... [2021-01-06 10:37:33,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eec7d97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:37:33, skipping insertion in model container [2021-01-06 10:37:33,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:37:33" (3/3) ... [2021-01-06 10:37:33,329 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum1.i [2021-01-06 10:37:33,343 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 10:37:33,349 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 10:37:33,367 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 10:37:33,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 10:37:33,395 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 10:37:33,396 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 10:37:33,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 10:37:33,396 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 10:37:33,396 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 10:37:33,396 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 10:37:33,396 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 10:37:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2021-01-06 10:37:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 10:37:33,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:33,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:33,421 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:33,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:33,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-01-06 10:37:33,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:33,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731038548] [2021-01-06 10:37:33,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:33,715 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 10:37:33,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731038548] [2021-01-06 10:37:33,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 10:37:33,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 10:37:33,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929334816] [2021-01-06 10:37:33,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:37:33,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:33,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:37:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 10:37:33,745 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 3 states. [2021-01-06 10:37:33,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:33,780 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-01-06 10:37:33,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:37:33,783 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 10:37:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:33,798 INFO L225 Difference]: With dead ends: 52 [2021-01-06 10:37:33,799 INFO L226 Difference]: Without dead ends: 25 [2021-01-06 10:37:33,803 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 10:37:33,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-01-06 10:37:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-01-06 10:37:33,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-01-06 10:37:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-01-06 10:37:33,856 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-01-06 10:37:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:33,857 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-01-06 10:37:33,857 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:37:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-01-06 10:37:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 10:37:33,860 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:33,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:33,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 10:37:33,861 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-01-06 10:37:33,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:33,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420049618] [2021-01-06 10:37:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:33,961 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 10:37:33,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420049618] [2021-01-06 10:37:33,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157483563] [2021-01-06 10:37:33,962 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 10:37:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:37:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:34,115 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 10:37:34,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:37:34,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:37:34,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952994215] [2021-01-06 10:37:34,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:37:34,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:37:34,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:34,120 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 3 states. [2021-01-06 10:37:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:34,156 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 10:37:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:37:34,157 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 10:37:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:34,158 INFO L225 Difference]: With dead ends: 46 [2021-01-06 10:37:34,158 INFO L226 Difference]: Without dead ends: 30 [2021-01-06 10:37:34,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 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 10:37:34,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-01-06 10:37:34,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-01-06 10:37:34,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 10:37:34,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-01-06 10:37:34,167 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-01-06 10:37:34,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:34,167 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-01-06 10:37:34,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:37:34,168 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-01-06 10:37:34,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 10:37:34,168 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:34,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:34,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 10:37:34,383 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-01-06 10:37:34,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:34,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015614207] [2021-01-06 10:37:34,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 10:37:34,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015614207] [2021-01-06 10:37:34,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671958505] [2021-01-06 10:37:34,481 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 10:37:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-01-06 10:37:34,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:37:34,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 10:37:34,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-01-06 10:37:34,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29259882] [2021-01-06 10:37:34,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 10:37:34,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:34,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 10:37:34,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:34,601 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2021-01-06 10:37:34,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:34,616 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-01-06 10:37:34,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 10:37:34,617 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2021-01-06 10:37:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:34,618 INFO L225 Difference]: With dead ends: 38 [2021-01-06 10:37:34,618 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 10:37:34,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 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 10:37:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 10:37:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 10:37:34,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 10:37:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-01-06 10:37:34,625 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-01-06 10:37:34,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:34,626 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-01-06 10:37:34,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 10:37:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-01-06 10:37:34,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 10:37:34,627 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:34,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:34,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:34,842 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:34,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-01-06 10:37:34,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:34,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409122889] [2021-01-06 10:37:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:37:34,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409122889] [2021-01-06 10:37:34,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777095444] [2021-01-06 10:37:34,913 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 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 10:37:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:37:35,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-01-06 10:37:35,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:35,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 10:37:35,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466241348] [2021-01-06 10:37:35,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 10:37:35,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:35,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 10:37:35,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 10:37:35,104 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2021-01-06 10:37:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:35,147 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-01-06 10:37:35,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 10:37:35,148 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2021-01-06 10:37:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:35,149 INFO L225 Difference]: With dead ends: 54 [2021-01-06 10:37:35,150 INFO L226 Difference]: Without dead ends: 31 [2021-01-06 10:37:35,151 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 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 10:37:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-01-06 10:37:35,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-01-06 10:37:35,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-01-06 10:37:35,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-01-06 10:37:35,158 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-01-06 10:37:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:35,159 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-01-06 10:37:35,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 10:37:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-01-06 10:37:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 10:37:35,160 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:35,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:35,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:35,376 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:35,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:35,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-01-06 10:37:35,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:35,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286465556] [2021-01-06 10:37:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:37:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286465556] [2021-01-06 10:37:35,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834637176] [2021-01-06 10:37:35,481 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 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 10:37:35,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:35,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 10:37:35,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 10:37:35,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:35,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-01-06 10:37:35,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998362900] [2021-01-06 10:37:35,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 10:37:35,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:35,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 10:37:35,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:37:35,678 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2021-01-06 10:37:35,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:35,791 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-01-06 10:37:35,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:37:35,792 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2021-01-06 10:37:35,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:35,797 INFO L225 Difference]: With dead ends: 61 [2021-01-06 10:37:35,798 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 10:37:35,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 10:37:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 10:37:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-01-06 10:37:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 10:37:35,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-01-06 10:37:35,825 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-01-06 10:37:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:35,826 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-01-06 10:37:35,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 10:37:35,826 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-01-06 10:37:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-01-06 10:37:35,828 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:35,828 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:36,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:36,037 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:36,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-01-06 10:37:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:36,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785034524] [2021-01-06 10:37:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:37:36,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785034524] [2021-01-06 10:37:36,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256571173] [2021-01-06 10:37:36,179 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 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 10:37:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 10:37:36,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:36,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:37:36,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-01-06 10:37:36,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:36,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-01-06 10:37:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30035562] [2021-01-06 10:37:36,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 10:37:36,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 10:37:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:37:36,318 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 8 states. [2021-01-06 10:37:36,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:36,407 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-01-06 10:37:36,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 10:37:36,408 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2021-01-06 10:37:36,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:36,409 INFO L225 Difference]: With dead ends: 81 [2021-01-06 10:37:36,409 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 10:37:36,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-01-06 10:37:36,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 10:37:36,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-01-06 10:37:36,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 10:37:36,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-01-06 10:37:36,416 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-01-06 10:37:36,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:36,417 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-01-06 10:37:36,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 10:37:36,417 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-01-06 10:37:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 10:37:36,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:36,418 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:36,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 10:37:36,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:36,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-01-06 10:37:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:36,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377032188] [2021-01-06 10:37:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:37:36,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377032188] [2021-01-06 10:37:36,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715815616] [2021-01-06 10:37:36,744 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 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 10:37:36,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:37:36,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:37:36,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:36,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 10:37:36,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028388207] [2021-01-06 10:37:36,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 10:37:36,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:36,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 10:37:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 10:37:36,880 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 7 states. [2021-01-06 10:37:36,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:36,917 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-01-06 10:37:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 10:37:36,918 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2021-01-06 10:37:36,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:36,919 INFO L225 Difference]: With dead ends: 86 [2021-01-06 10:37:36,919 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 10:37:36,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 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 10:37:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 10:37:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-01-06 10:37:36,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-01-06 10:37:36,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-01-06 10:37:36,926 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-01-06 10:37:36,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:36,926 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-01-06 10:37:36,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 10:37:36,926 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-01-06 10:37:36,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-01-06 10:37:36,928 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:36,928 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:37,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:37,142 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:37,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:37,143 INFO L82 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-01-06 10:37:37,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:37,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955945059] [2021-01-06 10:37:37,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-01-06 10:37:37,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955945059] [2021-01-06 10:37:37,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986433988] [2021-01-06 10:37:37,216 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 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 10:37:37,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 10:37:37,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:37:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-01-06 10:37:37,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:37,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-01-06 10:37:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035525284] [2021-01-06 10:37:37,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:37:37,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:37:37,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:37,418 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 11 states. [2021-01-06 10:37:37,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:37,512 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-01-06 10:37:37,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:37:37,513 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2021-01-06 10:37:37,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:37,514 INFO L225 Difference]: With dead ends: 97 [2021-01-06 10:37:37,514 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 10:37:37,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:37,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 10:37:37,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-01-06 10:37:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 10:37:37,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-01-06 10:37:37,521 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-01-06 10:37:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:37,522 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-01-06 10:37:37,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:37:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-01-06 10:37:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-01-06 10:37:37,523 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:37,523 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:37,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:37,737 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:37,738 INFO L82 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-01-06 10:37:37,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:37,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932977787] [2021-01-06 10:37:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:37,818 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-01-06 10:37:37,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932977787] [2021-01-06 10:37:37,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044443523] [2021-01-06 10:37:37,819 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 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 10:37:38,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 10:37:38,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 10:37:38,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:38,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:38,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-01-06 10:37:38,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657258616] [2021-01-06 10:37:38,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:37:38,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:37:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:38,228 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 11 states. [2021-01-06 10:37:38,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:38,307 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-01-06 10:37:38,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 10:37:38,307 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2021-01-06 10:37:38,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:38,311 INFO L225 Difference]: With dead ends: 105 [2021-01-06 10:37:38,311 INFO L226 Difference]: Without dead ends: 62 [2021-01-06 10:37:38,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-01-06 10:37:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-01-06 10:37:38,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 10:37:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-01-06 10:37:38,322 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-01-06 10:37:38,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:38,324 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-01-06 10:37:38,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:37:38,325 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-01-06 10:37:38,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-01-06 10:37:38,326 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:38,326 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:38,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 10:37:38,542 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:38,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-01-06 10:37:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:38,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867607417] [2021-01-06 10:37:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:38,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867607417] [2021-01-06 10:37:38,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097860398] [2021-01-06 10:37:38,630 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 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 10:37:38,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:37:38,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:38,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:38,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 10:37:38,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903152195] [2021-01-06 10:37:38,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 10:37:38,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:38,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 10:37:38,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 10:37:38,778 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand 10 states. [2021-01-06 10:37:38,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:38,811 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-01-06 10:37:38,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 10:37:38,812 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2021-01-06 10:37:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:38,813 INFO L225 Difference]: With dead ends: 108 [2021-01-06 10:37:38,813 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 10:37:38,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 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 10:37:38,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 10:37:38,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 10:37:38,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 10:37:38,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-01-06 10:37:38,820 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-01-06 10:37:38,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:38,820 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-01-06 10:37:38,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 10:37:38,820 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-01-06 10:37:38,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-01-06 10:37:38,821 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:38,821 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:39,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:39,035 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:39,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:39,036 INFO L82 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-01-06 10:37:39,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:39,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833447614] [2021-01-06 10:37:39,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:39,126 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:39,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833447614] [2021-01-06 10:37:39,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855427296] [2021-01-06 10:37:39,127 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 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 10:37:39,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:39,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:39,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:37:39,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:39,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:39,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 10:37:39,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669346989] [2021-01-06 10:37:39,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 10:37:39,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:39,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 10:37:39,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 10:37:39,287 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 11 states. [2021-01-06 10:37:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:39,334 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-01-06 10:37:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 10:37:39,335 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2021-01-06 10:37:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:39,336 INFO L225 Difference]: With dead ends: 110 [2021-01-06 10:37:39,336 INFO L226 Difference]: Without dead ends: 65 [2021-01-06 10:37:39,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 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 10:37:39,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-01-06 10:37:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-01-06 10:37:39,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 10:37:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-01-06 10:37:39,342 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-01-06 10:37:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:39,343 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-01-06 10:37:39,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 10:37:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-01-06 10:37:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 10:37:39,344 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:39,344 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:39,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:39,557 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:39,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:39,558 INFO L82 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-01-06 10:37:39,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:39,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182378001] [2021-01-06 10:37:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 10:37:39,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182378001] [2021-01-06 10:37:39,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529214459] [2021-01-06 10:37:39,660 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 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 10:37:39,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 10:37:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 10:37:39,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-01-06 10:37:39,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:39,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-01-06 10:37:39,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033451724] [2021-01-06 10:37:39,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 10:37:39,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 10:37:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:37:39,853 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 15 states. [2021-01-06 10:37:39,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:39,916 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-01-06 10:37:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:37:39,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2021-01-06 10:37:39,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:39,918 INFO L225 Difference]: With dead ends: 115 [2021-01-06 10:37:39,918 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 10:37:39,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-01-06 10:37:39,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 10:37:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-01-06 10:37:39,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 10:37:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-01-06 10:37:39,924 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-01-06 10:37:39,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:39,925 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-01-06 10:37:39,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 10:37:39,925 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-01-06 10:37:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-01-06 10:37:39,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:39,926 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:40,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 10:37:40,141 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:40,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:40,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-01-06 10:37:40,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:40,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179121885] [2021-01-06 10:37:40,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:37:40,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179121885] [2021-01-06 10:37:40,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493111400] [2021-01-06 10:37:40,250 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 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 10:37:40,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:40,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:40,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:37:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:40,428 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:37:40,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:40,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 10:37:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620390497] [2021-01-06 10:37:40,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 10:37:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:40,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 10:37:40,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 10:37:40,431 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 13 states. [2021-01-06 10:37:40,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:40,475 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-01-06 10:37:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 10:37:40,475 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2021-01-06 10:37:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:40,476 INFO L225 Difference]: With dead ends: 118 [2021-01-06 10:37:40,476 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 10:37:40,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 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 10:37:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 10:37:40,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-01-06 10:37:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 10:37:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-01-06 10:37:40,483 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-01-06 10:37:40,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:40,483 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-01-06 10:37:40,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 10:37:40,483 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-01-06 10:37:40,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 10:37:40,484 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:40,485 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:40,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 10:37:40,699 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:40,700 INFO L82 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-01-06 10:37:40,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:40,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346697719] [2021-01-06 10:37:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:37:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346697719] [2021-01-06 10:37:40,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823287141] [2021-01-06 10:37:40,821 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 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 10:37:41,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 10:37:41,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:37:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:37:41,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:41,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 10:37:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944477117] [2021-01-06 10:37:41,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 10:37:41,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 10:37:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 10:37:41,113 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 14 states. [2021-01-06 10:37:41,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:41,152 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-01-06 10:37:41,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 10:37:41,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 69 [2021-01-06 10:37:41,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:41,154 INFO L225 Difference]: With dead ends: 120 [2021-01-06 10:37:41,154 INFO L226 Difference]: Without dead ends: 73 [2021-01-06 10:37:41,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 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 10:37:41,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-01-06 10:37:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-01-06 10:37:41,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 10:37:41,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-01-06 10:37:41,159 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-01-06 10:37:41,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:41,160 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-01-06 10:37:41,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 10:37:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-01-06 10:37:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-01-06 10:37:41,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:41,161 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:41,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 10:37:41,376 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:41,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:41,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-01-06 10:37:41,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:41,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447637454] [2021-01-06 10:37:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:41,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:41,504 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-01-06 10:37:41,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447637454] [2021-01-06 10:37:41,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386639409] [2021-01-06 10:37:41,505 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 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 10:37:41,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 10:37:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:37:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-01-06 10:37:42,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:42,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-01-06 10:37:42,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901912129] [2021-01-06 10:37:42,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:37:42,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:42,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:37:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:37:42,054 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 19 states. [2021-01-06 10:37:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:42,134 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-01-06 10:37:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:37:42,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2021-01-06 10:37:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:42,135 INFO L225 Difference]: With dead ends: 125 [2021-01-06 10:37:42,135 INFO L226 Difference]: Without dead ends: 78 [2021-01-06 10:37:42,139 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:37:42,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-01-06 10:37:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-01-06 10:37:42,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 10:37:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-01-06 10:37:42,146 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-01-06 10:37:42,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:42,146 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-01-06 10:37:42,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:37:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-01-06 10:37:42,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-01-06 10:37:42,151 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:42,151 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:42,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:42,366 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:42,367 INFO L82 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-01-06 10:37:42,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:42,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452021567] [2021-01-06 10:37:42,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:42,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452021567] [2021-01-06 10:37:42,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34003502] [2021-01-06 10:37:42,516 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 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 10:37:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:42,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 10:37:42,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:42,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:42,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 10:37:42,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018411926] [2021-01-06 10:37:42,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 10:37:42,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:42,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 10:37:42,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:37:42,680 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 16 states. [2021-01-06 10:37:42,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:42,754 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-01-06 10:37:42,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 10:37:42,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2021-01-06 10:37:42,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:42,756 INFO L225 Difference]: With dead ends: 128 [2021-01-06 10:37:42,756 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 10:37:42,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 10:37:42,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 10:37:42,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-01-06 10:37:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 10:37:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-01-06 10:37:42,761 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-01-06 10:37:42,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:42,761 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-01-06 10:37:42,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 10:37:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-01-06 10:37:42,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-01-06 10:37:42,762 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:42,762 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:42,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 10:37:42,977 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:42,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:42,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-01-06 10:37:42,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:42,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139867411] [2021-01-06 10:37:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:43,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139867411] [2021-01-06 10:37:43,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048770872] [2021-01-06 10:37:43,130 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 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 10:37:43,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:43,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:43,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 10:37:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:43,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:43,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 10:37:43,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583445708] [2021-01-06 10:37:43,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 10:37:43,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:43,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 10:37:43,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:37:43,288 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 17 states. [2021-01-06 10:37:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:43,341 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-01-06 10:37:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 10:37:43,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 77 [2021-01-06 10:37:43,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:43,342 INFO L225 Difference]: With dead ends: 130 [2021-01-06 10:37:43,342 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 10:37:43,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 10:37:43,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 10:37:43,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-01-06 10:37:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2021-01-06 10:37:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-01-06 10:37:43,347 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-01-06 10:37:43,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:43,348 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-01-06 10:37:43,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 10:37:43,348 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-01-06 10:37:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-01-06 10:37:43,349 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:43,349 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:43,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 10:37:43,563 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:43,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:43,564 INFO L82 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-01-06 10:37:43,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:43,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695985742] [2021-01-06 10:37:43,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:43,753 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-01-06 10:37:43,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695985742] [2021-01-06 10:37:43,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829651085] [2021-01-06 10:37:43,754 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 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 10:37:43,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 10:37:43,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:43,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 10:37:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-01-06 10:37:43,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:43,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-01-06 10:37:43,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176174789] [2021-01-06 10:37:43,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:37:43,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:43,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:37:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:37:43,998 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 22 states. [2021-01-06 10:37:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:44,184 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-01-06 10:37:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:37:44,185 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 79 [2021-01-06 10:37:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:44,186 INFO L225 Difference]: With dead ends: 141 [2021-01-06 10:37:44,187 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 10:37:44,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:37:44,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 10:37:44,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-01-06 10:37:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 10:37:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-01-06 10:37:44,194 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-01-06 10:37:44,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:44,195 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-01-06 10:37:44,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:37:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-01-06 10:37:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 10:37:44,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:44,196 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:44,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 10:37:44,410 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-01-06 10:37:44,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:44,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823719624] [2021-01-06 10:37:44,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:44,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:37:44,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823719624] [2021-01-06 10:37:44,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874282343] [2021-01-06 10:37:44,605 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 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 10:37:44,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:44,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:44,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 10:37:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:44,865 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:37:44,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:44,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 10:37:44,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899742113] [2021-01-06 10:37:44,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 10:37:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 10:37:44,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 10:37:44,869 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 19 states. [2021-01-06 10:37:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:44,929 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-01-06 10:37:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 10:37:44,930 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 87 [2021-01-06 10:37:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:44,931 INFO L225 Difference]: With dead ends: 146 [2021-01-06 10:37:44,931 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 10:37:44,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 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 10:37:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 10:37:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-01-06 10:37:44,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2021-01-06 10:37:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-01-06 10:37:44,935 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-01-06 10:37:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:44,936 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-01-06 10:37:44,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 10:37:44,936 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-01-06 10:37:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-01-06 10:37:44,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:44,939 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:45,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:45,154 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:45,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-01-06 10:37:45,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:45,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372302670] [2021-01-06 10:37:45,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:37:45,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372302670] [2021-01-06 10:37:45,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684737946] [2021-01-06 10:37:45,391 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:46,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-01-06 10:37:46,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 10:37:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:37:46,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:46,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 10:37:46,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927380183] [2021-01-06 10:37:46,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 10:37:46,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:46,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 10:37:46,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 10:37:46,451 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 20 states. [2021-01-06 10:37:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:46,507 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-01-06 10:37:46,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 10:37:46,508 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2021-01-06 10:37:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:46,509 INFO L225 Difference]: With dead ends: 148 [2021-01-06 10:37:46,509 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 10:37:46,509 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 10:37:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 10:37:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-01-06 10:37:46,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2021-01-06 10:37:46,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-01-06 10:37:46,513 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-01-06 10:37:46,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:46,514 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-01-06 10:37:46,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 10:37:46,514 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-01-06 10:37:46,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-01-06 10:37:46,515 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:46,515 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:46,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:46,729 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:46,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:46,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-01-06 10:37:46,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:46,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988517891] [2021-01-06 10:37:46,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:46,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:46,967 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 10:37:46,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988517891] [2021-01-06 10:37:46,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925427330] [2021-01-06 10:37:46,968 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:47,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-01-06 10:37:47,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:47,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:37:47,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:47,862 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-01-06 10:37:47,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:47,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-01-06 10:37:47,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168007767] [2021-01-06 10:37:47,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 10:37:47,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:47,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 10:37:47,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:37:47,864 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand 26 states. [2021-01-06 10:37:48,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:48,025 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-01-06 10:37:48,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 10:37:48,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 91 [2021-01-06 10:37:48,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:48,027 INFO L225 Difference]: With dead ends: 159 [2021-01-06 10:37:48,027 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 10:37:48,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-01-06 10:37:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 10:37:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-01-06 10:37:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2021-01-06 10:37:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-01-06 10:37:48,033 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-01-06 10:37:48,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:48,034 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-01-06 10:37:48,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 10:37:48,034 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-01-06 10:37:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 10:37:48,035 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:48,035 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:48,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 10:37:48,250 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:48,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-01-06 10:37:48,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:48,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904775625] [2021-01-06 10:37:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:48,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:37:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904775625] [2021-01-06 10:37:48,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831435633] [2021-01-06 10:37:48,514 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:48,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 10:37:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:37:48,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:48,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 10:37:48,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746939649] [2021-01-06 10:37:48,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 10:37:48,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:48,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 10:37:48,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:37:48,711 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 22 states. [2021-01-06 10:37:48,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:48,780 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-01-06 10:37:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 10:37:48,780 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2021-01-06 10:37:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:48,781 INFO L225 Difference]: With dead ends: 164 [2021-01-06 10:37:48,781 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 10:37:48,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 10:37:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 10:37:48,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-01-06 10:37:48,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2021-01-06 10:37:48,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-01-06 10:37:48,787 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-01-06 10:37:48,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:48,787 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-01-06 10:37:48,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 10:37:48,787 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-01-06 10:37:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-01-06 10:37:48,788 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:48,789 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:49,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 10:37:49,002 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:49,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-01-06 10:37:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679011695] [2021-01-06 10:37:49,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:49,300 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:37:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679011695] [2021-01-06 10:37:49,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616712524] [2021-01-06 10:37:49,301 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:49,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:37:49,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:49,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 10:37:49,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:37:49,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:49,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 10:37:49,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948629469] [2021-01-06 10:37:49,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 10:37:49,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:49,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 10:37:49,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:37:49,492 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 23 states. [2021-01-06 10:37:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:49,560 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2021-01-06 10:37:49,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 10:37:49,560 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 101 [2021-01-06 10:37:49,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:49,561 INFO L225 Difference]: With dead ends: 166 [2021-01-06 10:37:49,561 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 10:37:49,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 10:37:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 10:37:49,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 10:37:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 10:37:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-01-06 10:37:49,566 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-01-06 10:37:49,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:49,567 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-01-06 10:37:49,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 10:37:49,567 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-01-06 10:37:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-01-06 10:37:49,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:49,568 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:49,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:49,783 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:49,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:49,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-01-06 10:37:49,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:49,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230600355] [2021-01-06 10:37:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-01-06 10:37:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230600355] [2021-01-06 10:37:50,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111319885] [2021-01-06 10:37:50,061 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:50,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 10:37:50,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:50,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 10:37:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:50,519 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-01-06 10:37:50,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:50,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-01-06 10:37:50,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267053301] [2021-01-06 10:37:50,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:37:50,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:50,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:37:50,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:37:50,522 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 29 states. [2021-01-06 10:37:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:50,632 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-01-06 10:37:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 10:37:50,633 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 103 [2021-01-06 10:37:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:50,634 INFO L225 Difference]: With dead ends: 171 [2021-01-06 10:37:50,634 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 10:37:50,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:37:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 10:37:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-01-06 10:37:50,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 10:37:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-01-06 10:37:50,639 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-01-06 10:37:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:50,640 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-01-06 10:37:50,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:37:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-01-06 10:37:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-01-06 10:37:50,641 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:50,641 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:50,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 10:37:50,856 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:50,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:50,857 INFO L82 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2021-01-06 10:37:50,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:50,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667229040] [2021-01-06 10:37:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-01-06 10:37:51,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667229040] [2021-01-06 10:37:51,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065242036] [2021-01-06 10:37:51,150 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:51,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:37:51,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:37:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-01-06 10:37:51,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:51,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 9] total 31 [2021-01-06 10:37:51,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252177902] [2021-01-06 10:37:51,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:37:51,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:51,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:37:51,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:37:51,462 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand 31 states. [2021-01-06 10:37:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:51,559 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2021-01-06 10:37:51,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 10:37:51,560 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 107 [2021-01-06 10:37:51,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:51,561 INFO L225 Difference]: With dead ends: 177 [2021-01-06 10:37:51,561 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 10:37:51,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:37:51,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 10:37:51,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2021-01-06 10:37:51,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2021-01-06 10:37:51,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2021-01-06 10:37:51,567 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 107 [2021-01-06 10:37:51,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:51,567 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2021-01-06 10:37:51,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:37:51,567 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2021-01-06 10:37:51,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 10:37:51,568 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:51,569 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:51,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:51,785 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:51,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:51,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1973169506, now seen corresponding path program 23 times [2021-01-06 10:37:51,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:51,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331966458] [2021-01-06 10:37:51,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:52,118 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-01-06 10:37:52,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331966458] [2021-01-06 10:37:52,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247140821] [2021-01-06 10:37:52,119 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:55,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-01-06 10:37:55,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 10:37:55,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 605 trivial. 0 not checked. [2021-01-06 10:37:56,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:56,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-01-06 10:37:56,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142713589] [2021-01-06 10:37:56,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 10:37:56,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:56,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 10:37:56,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:37:56,191 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 32 states. [2021-01-06 10:37:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:56,379 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2021-01-06 10:37:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 10:37:56,380 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2021-01-06 10:37:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:56,381 INFO L225 Difference]: With dead ends: 189 [2021-01-06 10:37:56,381 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 10:37:56,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-01-06 10:37:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 10:37:56,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-01-06 10:37:56,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2021-01-06 10:37:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2021-01-06 10:37:56,386 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 111 [2021-01-06 10:37:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:56,387 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2021-01-06 10:37:56,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 10:37:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2021-01-06 10:37:56,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-01-06 10:37:56,388 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:56,388 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:56,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 10:37:56,602 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:56,602 INFO L82 PathProgramCache]: Analyzing trace with hash 41685082, now seen corresponding path program 24 times [2021-01-06 10:37:56,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:56,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915452476] [2021-01-06 10:37:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-01-06 10:37:56,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915452476] [2021-01-06 10:37:56,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261723858] [2021-01-06 10:37:56,964 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:58,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 10:37:58,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:37:58,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:37:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-01-06 10:37:58,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:58,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 10] total 34 [2021-01-06 10:37:58,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629279069] [2021-01-06 10:37:58,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:37:58,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:37:58,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:37:58,338 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 34 states. [2021-01-06 10:37:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:58,527 INFO L93 Difference]: Finished difference Result 203 states and 214 transitions. [2021-01-06 10:37:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:37:58,527 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 119 [2021-01-06 10:37:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:58,529 INFO L225 Difference]: With dead ends: 203 [2021-01-06 10:37:58,529 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 10:37:58,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:37:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 10:37:58,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2021-01-06 10:37:58,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 10:37:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2021-01-06 10:37:58,535 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2021-01-06 10:37:58,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:58,536 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2021-01-06 10:37:58,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:37:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2021-01-06 10:37:58,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-01-06 10:37:58,537 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:58,537 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:58,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 10:37:58,751 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:58,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1061851926, now seen corresponding path program 25 times [2021-01-06 10:37:58,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:58,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814278066] [2021-01-06 10:37:58,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:37:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814278066] [2021-01-06 10:37:59,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970480730] [2021-01-06 10:37:59,166 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:37:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:37:59,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 10:37:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:37:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:37:59,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:37:59,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 10:37:59,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742639528] [2021-01-06 10:37:59,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 10:37:59,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:37:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 10:37:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:37:59,401 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 28 states. [2021-01-06 10:37:59,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:37:59,486 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2021-01-06 10:37:59,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 10:37:59,487 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 127 [2021-01-06 10:37:59,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:37:59,488 INFO L225 Difference]: With dead ends: 208 [2021-01-06 10:37:59,488 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 10:37:59,489 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 10:37:59,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 10:37:59,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2021-01-06 10:37:59,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2021-01-06 10:37:59,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 134 transitions. [2021-01-06 10:37:59,494 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 134 transitions. Word has length 127 [2021-01-06 10:37:59,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:37:59,494 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 134 transitions. [2021-01-06 10:37:59,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 10:37:59,495 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 134 transitions. [2021-01-06 10:37:59,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 10:37:59,496 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:37:59,496 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:37:59,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 10:37:59,710 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:37:59,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:37:59,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1066289708, now seen corresponding path program 26 times [2021-01-06 10:37:59,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:37:59,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132160774] [2021-01-06 10:37:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:37:59,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:00,133 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132160774] [2021-01-06 10:38:00,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867810559] [2021-01-06 10:38:00,134 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:00,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:00,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:00,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 10:38:00,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:00,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:00,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 10:38:00,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969327328] [2021-01-06 10:38:00,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 10:38:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 10:38:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:00,387 INFO L87 Difference]: Start difference. First operand 130 states and 134 transitions. Second operand 29 states. [2021-01-06 10:38:00,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:00,465 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2021-01-06 10:38:00,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 10:38:00,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 129 [2021-01-06 10:38:00,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:00,466 INFO L225 Difference]: With dead ends: 210 [2021-01-06 10:38:00,466 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 10:38:00,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 10:38:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 10:38:00,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2021-01-06 10:38:00,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2021-01-06 10:38:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 136 transitions. [2021-01-06 10:38:00,472 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 136 transitions. Word has length 129 [2021-01-06 10:38:00,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:00,472 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 136 transitions. [2021-01-06 10:38:00,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 10:38:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 136 transitions. [2021-01-06 10:38:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-01-06 10:38:00,474 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:00,474 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:00,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 10:38:00,688 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:00,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:00,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1805967086, now seen corresponding path program 27 times [2021-01-06 10:38:00,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:00,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707593980] [2021-01-06 10:38:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-01-06 10:38:01,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707593980] [2021-01-06 10:38:01,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030616481] [2021-01-06 10:38:01,129 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:01,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 10:38:01,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:01,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 10:38:01,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 917 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 868 trivial. 0 not checked. [2021-01-06 10:38:01,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:01,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2021-01-06 10:38:01,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094682629] [2021-01-06 10:38:01,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 10:38:01,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:01,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 10:38:01,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:38:01,819 INFO L87 Difference]: Start difference. First operand 132 states and 136 transitions. Second operand 37 states. [2021-01-06 10:38:02,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:02,012 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2021-01-06 10:38:02,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 10:38:02,013 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 131 [2021-01-06 10:38:02,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:02,013 INFO L225 Difference]: With dead ends: 215 [2021-01-06 10:38:02,014 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 10:38:02,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 10:38:02,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 10:38:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-01-06 10:38:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2021-01-06 10:38:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-01-06 10:38:02,021 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 131 [2021-01-06 10:38:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:02,021 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-01-06 10:38:02,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 10:38:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-01-06 10:38:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 10:38:02,023 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:02,023 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:02,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,238 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:02,239 INFO L82 PathProgramCache]: Analyzing trace with hash 523116366, now seen corresponding path program 28 times [2021-01-06 10:38:02,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:02,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893423733] [2021-01-06 10:38:02,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:02,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893423733] [2021-01-06 10:38:02,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444233895] [2021-01-06 10:38:02,726 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:02,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:02,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 10:38:02,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 985 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:02,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:02,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 10:38:02,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999773474] [2021-01-06 10:38:02,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 10:38:02,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:02,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 10:38:02,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:38:02,993 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 31 states. [2021-01-06 10:38:03,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:03,088 INFO L93 Difference]: Finished difference Result 218 states and 226 transitions. [2021-01-06 10:38:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 10:38:03,089 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 135 [2021-01-06 10:38:03,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:03,090 INFO L225 Difference]: With dead ends: 218 [2021-01-06 10:38:03,090 INFO L226 Difference]: Without dead ends: 139 [2021-01-06 10:38:03,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 10:38:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-01-06 10:38:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-01-06 10:38:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2021-01-06 10:38:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2021-01-06 10:38:03,095 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 135 [2021-01-06 10:38:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:03,096 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2021-01-06 10:38:03,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 10:38:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2021-01-06 10:38:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-01-06 10:38:03,097 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:03,097 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:03,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:03,311 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1428315124, now seen corresponding path program 29 times [2021-01-06 10:38:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:03,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945279969] [2021-01-06 10:38:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2021-01-06 10:38:03,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945279969] [2021-01-06 10:38:03,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572923801] [2021-01-06 10:38:03,811 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:16,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-01-06 10:38:16,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:16,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:16,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:16,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-01-06 10:38:16,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:16,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-01-06 10:38:16,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794879578] [2021-01-06 10:38:16,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:38:16,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:16,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:38:16,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:16,359 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand 40 states. [2021-01-06 10:38:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:16,558 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2021-01-06 10:38:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:38:16,559 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 137 [2021-01-06 10:38:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:16,559 INFO L225 Difference]: With dead ends: 223 [2021-01-06 10:38:16,559 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 10:38:16,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 10:38:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2021-01-06 10:38:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2021-01-06 10:38:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2021-01-06 10:38:16,565 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 137 [2021-01-06 10:38:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:16,565 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2021-01-06 10:38:16,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:38:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2021-01-06 10:38:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 10:38:16,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:16,566 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:16,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:16,781 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:16,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:16,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1798907208, now seen corresponding path program 30 times [2021-01-06 10:38:16,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:16,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39548002] [2021-01-06 10:38:16,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-01-06 10:38:17,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39548002] [2021-01-06 10:38:17,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815678831] [2021-01-06 10:38:17,285 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:20,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-01-06 10:38:20,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 10:38:20,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1114 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2021-01-06 10:38:20,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:20,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 11] total 41 [2021-01-06 10:38:20,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669764117] [2021-01-06 10:38:20,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:38:20,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:38:20,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:38:20,921 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 41 states. [2021-01-06 10:38:21,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:21,271 INFO L93 Difference]: Finished difference Result 235 states and 246 transitions. [2021-01-06 10:38:21,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 10:38:21,272 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 141 [2021-01-06 10:38:21,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:21,274 INFO L225 Difference]: With dead ends: 235 [2021-01-06 10:38:21,274 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 10:38:21,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=550, Invalid=1090, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:38:21,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 10:38:21,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-01-06 10:38:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2021-01-06 10:38:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-01-06 10:38:21,280 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 141 [2021-01-06 10:38:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:21,281 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-01-06 10:38:21,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:38:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-01-06 10:38:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-01-06 10:38:21,282 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:21,282 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:21,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 10:38:21,496 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash 308754692, now seen corresponding path program 31 times [2021-01-06 10:38:21,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:21,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250364465] [2021-01-06 10:38:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250364465] [2021-01-06 10:38:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116325853] [2021-01-06 10:38:22,066 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:22,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:22,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 10:38:22,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:22,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:22,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 10:38:22,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089535538] [2021-01-06 10:38:22,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 10:38:22,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:22,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 10:38:22,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:22,327 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand 34 states. [2021-01-06 10:38:22,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:22,433 INFO L93 Difference]: Finished difference Result 240 states and 248 transitions. [2021-01-06 10:38:22,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 10:38:22,434 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 149 [2021-01-06 10:38:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:22,435 INFO L225 Difference]: With dead ends: 240 [2021-01-06 10:38:22,436 INFO L226 Difference]: Without dead ends: 153 [2021-01-06 10:38:22,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 10:38:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-01-06 10:38:22,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-01-06 10:38:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2021-01-06 10:38:22,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-01-06 10:38:22,441 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-01-06 10:38:22,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:22,441 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-01-06 10:38:22,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 10:38:22,442 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-01-06 10:38:22,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-01-06 10:38:22,443 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:22,443 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:22,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:22,654 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:22,654 INFO L82 PathProgramCache]: Analyzing trace with hash -747071166, now seen corresponding path program 32 times [2021-01-06 10:38:22,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:22,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011024072] [2021-01-06 10:38:22,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:23,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011024072] [2021-01-06 10:38:23,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33705345] [2021-01-06 10:38:23,255 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:23,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:23,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:23,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 10:38:23,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1285 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:23,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:23,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 10:38:23,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811876963] [2021-01-06 10:38:23,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 10:38:23,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:23,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 10:38:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:38:23,521 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 35 states. [2021-01-06 10:38:23,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:23,646 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2021-01-06 10:38:23,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 10:38:23,649 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 151 [2021-01-06 10:38:23,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:23,650 INFO L225 Difference]: With dead ends: 242 [2021-01-06 10:38:23,650 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 10:38:23,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 10:38:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 10:38:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2021-01-06 10:38:23,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2021-01-06 10:38:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 158 transitions. [2021-01-06 10:38:23,656 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 158 transitions. Word has length 151 [2021-01-06 10:38:23,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:23,657 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 158 transitions. [2021-01-06 10:38:23,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 10:38:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 158 transitions. [2021-01-06 10:38:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-01-06 10:38:23,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:23,658 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:23,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 10:38:23,867 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:23,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1783438848, now seen corresponding path program 33 times [2021-01-06 10:38:23,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:23,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621689669] [2021-01-06 10:38:23,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-01-06 10:38:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621689669] [2021-01-06 10:38:24,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51838681] [2021-01-06 10:38:24,487 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:25,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 10:38:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:25,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:38:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:25,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1348 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-01-06 10:38:25,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:25,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 12] total 45 [2021-01-06 10:38:25,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186910924] [2021-01-06 10:38:25,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 10:38:25,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:25,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 10:38:25,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:38:25,851 INFO L87 Difference]: Start difference. First operand 154 states and 158 transitions. Second operand 45 states. [2021-01-06 10:38:26,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:26,224 INFO L93 Difference]: Finished difference Result 253 states and 264 transitions. [2021-01-06 10:38:26,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 10:38:26,225 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 153 [2021-01-06 10:38:26,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:26,226 INFO L225 Difference]: With dead ends: 253 [2021-01-06 10:38:26,226 INFO L226 Difference]: Without dead ends: 166 [2021-01-06 10:38:26,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=660, Invalid=1320, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 10:38:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-01-06 10:38:26,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2021-01-06 10:38:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2021-01-06 10:38:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2021-01-06 10:38:26,233 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 153 [2021-01-06 10:38:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:26,233 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2021-01-06 10:38:26,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 10:38:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2021-01-06 10:38:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-01-06 10:38:26,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:26,234 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:26,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:26,450 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 213614268, now seen corresponding path program 34 times [2021-01-06 10:38:26,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:26,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530569299] [2021-01-06 10:38:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-01-06 10:38:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530569299] [2021-01-06 10:38:27,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528611806] [2021-01-06 10:38:27,178 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:27,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:27,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:38:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1470 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1370 trivial. 0 not checked. [2021-01-06 10:38:27,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:27,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 13] total 47 [2021-01-06 10:38:27,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814287316] [2021-01-06 10:38:27,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 10:38:27,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:27,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 10:38:27,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:38:27,704 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 47 states. [2021-01-06 10:38:27,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:27,939 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2021-01-06 10:38:27,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 10:38:27,939 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 161 [2021-01-06 10:38:27,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:27,941 INFO L225 Difference]: With dead ends: 267 [2021-01-06 10:38:27,941 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 10:38:27,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=707, Invalid=1455, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 10:38:27,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 10:38:27,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2021-01-06 10:38:27,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2021-01-06 10:38:27,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2021-01-06 10:38:27,946 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 161 [2021-01-06 10:38:27,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:27,946 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2021-01-06 10:38:27,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 10:38:27,947 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2021-01-06 10:38:27,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-01-06 10:38:27,947 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:27,947 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:28,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 10:38:28,148 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:28,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:28,149 INFO L82 PathProgramCache]: Analyzing trace with hash -628416392, now seen corresponding path program 35 times [2021-01-06 10:38:28,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:28,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393000783] [2021-01-06 10:38:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-01-06 10:38:28,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393000783] [2021-01-06 10:38:28,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154891833] [2021-01-06 10:38:28,866 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:31,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-01-06 10:38:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:31,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:38:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1479 trivial. 0 not checked. [2021-01-06 10:38:32,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:32,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 14] total 49 [2021-01-06 10:38:32,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435312023] [2021-01-06 10:38:32,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 10:38:32,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:32,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 10:38:32,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:38:32,163 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand 49 states. [2021-01-06 10:38:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:32,542 INFO L93 Difference]: Finished difference Result 281 states and 292 transitions. [2021-01-06 10:38:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 10:38:32,543 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2021-01-06 10:38:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:32,544 INFO L225 Difference]: With dead ends: 281 [2021-01-06 10:38:32,544 INFO L226 Difference]: Without dead ends: 182 [2021-01-06 10:38:32,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=756, Invalid=1596, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 10:38:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-01-06 10:38:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 178. [2021-01-06 10:38:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2021-01-06 10:38:32,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-01-06 10:38:32,552 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 169 [2021-01-06 10:38:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:32,552 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-01-06 10:38:32,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 10:38:32,552 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-01-06 10:38:32,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-01-06 10:38:32,553 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:32,554 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 12, 12, 12, 12, 12, 12, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:32,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 10:38:32,769 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:32,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:32,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1809286964, now seen corresponding path program 36 times [2021-01-06 10:38:32,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:32,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782464313] [2021-01-06 10:38:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2021-01-06 10:38:33,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782464313] [2021-01-06 10:38:33,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829290512] [2021-01-06 10:38:33,553 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:39,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 10:38:39,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:39,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 10:38:39,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:40,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1657 trivial. 0 not checked. [2021-01-06 10:38:40,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:40,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2021-01-06 10:38:40,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585609850] [2021-01-06 10:38:40,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 10:38:40,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:40,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 10:38:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:38:40,028 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 48 states. [2021-01-06 10:38:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:40,253 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-01-06 10:38:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 10:38:40,254 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 177 [2021-01-06 10:38:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:40,255 INFO L225 Difference]: With dead ends: 289 [2021-01-06 10:38:40,255 INFO L226 Difference]: Without dead ends: 184 [2021-01-06 10:38:40,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 10:38:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-01-06 10:38:40,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2021-01-06 10:38:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 10:38:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2021-01-06 10:38:40,261 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 177 [2021-01-06 10:38:40,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:40,262 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2021-01-06 10:38:40,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 10:38:40,262 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2021-01-06 10:38:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-01-06 10:38:40,263 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:40,263 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:40,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 10:38:40,477 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:40,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1693026416, now seen corresponding path program 37 times [2021-01-06 10:38:40,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:40,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403908981] [2021-01-06 10:38:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:38:41,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403908981] [2021-01-06 10:38:41,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970369557] [2021-01-06 10:38:41,284 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 10:38:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:41,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1828 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:38:41,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:41,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 10:38:41,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580892837] [2021-01-06 10:38:41,602 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 10:38:41,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:41,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 10:38:41,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:41,603 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand 40 states. [2021-01-06 10:38:41,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:41,734 INFO L93 Difference]: Finished difference Result 292 states and 300 transitions. [2021-01-06 10:38:41,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 10:38:41,735 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 181 [2021-01-06 10:38:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:41,736 INFO L225 Difference]: With dead ends: 292 [2021-01-06 10:38:41,736 INFO L226 Difference]: Without dead ends: 185 [2021-01-06 10:38:41,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 10:38:41,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-01-06 10:38:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-01-06 10:38:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2021-01-06 10:38:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2021-01-06 10:38:41,743 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 181 [2021-01-06 10:38:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:41,744 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2021-01-06 10:38:41,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 10:38:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2021-01-06 10:38:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 10:38:41,745 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:41,745 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:41,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 10:38:41,960 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:41,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash 45772974, now seen corresponding path program 38 times [2021-01-06 10:38:41,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:41,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629148983] [2021-01-06 10:38:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:41,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:38:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629148983] [2021-01-06 10:38:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233714685] [2021-01-06 10:38:42,777 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:42,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 10:38:42,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:42,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 10:38:42,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:43,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1901 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:38:43,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:43,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 10:38:43,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216590066] [2021-01-06 10:38:43,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 10:38:43,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 10:38:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:38:43,055 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 41 states. [2021-01-06 10:38:43,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:43,172 INFO L93 Difference]: Finished difference Result 294 states and 302 transitions. [2021-01-06 10:38:43,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 10:38:43,180 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 183 [2021-01-06 10:38:43,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:43,182 INFO L225 Difference]: With dead ends: 294 [2021-01-06 10:38:43,182 INFO L226 Difference]: Without dead ends: 187 [2021-01-06 10:38:43,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 10:38:43,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-01-06 10:38:43,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2021-01-06 10:38:43,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-01-06 10:38:43,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-01-06 10:38:43,192 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2021-01-06 10:38:43,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:43,192 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-01-06 10:38:43,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 10:38:43,192 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-01-06 10:38:43,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-01-06 10:38:43,193 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:43,194 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 12, 12, 12, 12, 12, 12, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:43,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:43,405 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:43,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:43,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1878147436, now seen corresponding path program 39 times [2021-01-06 10:38:43,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:43,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711498712] [2021-01-06 10:38:43,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-01-06 10:38:44,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711498712] [2021-01-06 10:38:44,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992657190] [2021-01-06 10:38:44,276 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:45,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-01-06 10:38:45,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:45,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 10:38:45,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1876 trivial. 0 not checked. [2021-01-06 10:38:45,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:45,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2021-01-06 10:38:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240001944] [2021-01-06 10:38:45,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 10:38:45,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 10:38:45,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:38:45,865 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 52 states. [2021-01-06 10:38:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:46,110 INFO L93 Difference]: Finished difference Result 299 states and 308 transitions. [2021-01-06 10:38:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 10:38:46,110 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 185 [2021-01-06 10:38:46,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:46,111 INFO L225 Difference]: With dead ends: 299 [2021-01-06 10:38:46,112 INFO L226 Difference]: Without dead ends: 192 [2021-01-06 10:38:46,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 10:38:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-01-06 10:38:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2021-01-06 10:38:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2021-01-06 10:38:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 194 transitions. [2021-01-06 10:38:46,119 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 194 transitions. Word has length 185 [2021-01-06 10:38:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:46,119 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 194 transitions. [2021-01-06 10:38:46,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 10:38:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 194 transitions. [2021-01-06 10:38:46,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-01-06 10:38:46,120 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:46,120 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:46,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 10:38:46,335 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:46,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1682311512, now seen corresponding path program 40 times [2021-01-06 10:38:46,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:46,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021715990] [2021-01-06 10:38:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-01-06 10:38:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021715990] [2021-01-06 10:38:47,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337023214] [2021-01-06 10:38:47,187 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:47,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 10:38:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 10:38:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 10:38:47,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 10:38:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2074 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2021-01-06 10:38:47,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 10:38:47,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 14] total 54 [2021-01-06 10:38:47,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630967753] [2021-01-06 10:38:47,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 10:38:47,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 10:38:47,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 10:38:47,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:38:47,748 INFO L87 Difference]: Start difference. First operand 190 states and 194 transitions. Second operand 54 states. [2021-01-06 10:38:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 10:38:47,972 INFO L93 Difference]: Finished difference Result 305 states and 314 transitions. [2021-01-06 10:38:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 10:38:47,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 189 [2021-01-06 10:38:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 10:38:47,974 INFO L225 Difference]: With dead ends: 305 [2021-01-06 10:38:47,974 INFO L226 Difference]: Without dead ends: 196 [2021-01-06 10:38:47,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=951, Invalid=1911, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 10:38:47,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-01-06 10:38:47,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 194. [2021-01-06 10:38:47,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2021-01-06 10:38:47,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2021-01-06 10:38:47,981 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 189 [2021-01-06 10:38:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 10:38:47,981 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2021-01-06 10:38:47,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 10:38:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2021-01-06 10:38:47,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-01-06 10:38:47,982 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 10:38:47,983 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 10:38:48,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 10:38:48,196 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 10:38:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 10:38:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1750482404, now seen corresponding path program 41 times [2021-01-06 10:38:48,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 10:38:48,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503493219] [2021-01-06 10:38:48,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 10:38:48,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 10:38:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2176 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 576 trivial. 0 not checked. [2021-01-06 10:38:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503493219] [2021-01-06 10:38:49,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686577761] [2021-01-06 10:38:49,143 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true