/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/float-benchs/zonotope_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:02:03,302 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:02:03,305 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:02:03,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:02:03,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:02:03,363 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:02:03,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:02:03,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:02:03,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:02:03,380 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:02:03,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:02:03,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:02:03,385 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:02:03,388 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:02:03,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:02:03,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:02:03,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:02:03,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:02:03,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:02:03,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:02:03,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:02:03,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:02:03,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:02:03,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:02:03,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:02:03,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:02:03,440 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:02:03,442 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:02:03,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:02:03,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:02:03,444 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:02:03,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:02:03,451 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:02:03,451 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:02:03,452 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:02:03,453 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:02:03,454 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 16:02:03,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:02:03,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:02:03,489 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:02:03,489 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:02:03,490 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:02:03,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:02:03,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:02:03,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:02:03,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:02:03,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:02:03,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:02:03,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:02:03,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:02:03,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:02:03,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:02:03,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:02:03,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:02:03,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:02:03,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:02:03,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:02:03,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:02:03,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:02:03,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:02:03,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:02:03,494 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:02:03,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:02:03,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:02:03,892 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:02:03,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:02:03,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:02:03,897 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:02:03,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c [2021-01-06 16:02:03,984 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0b8e184c9/62fc56b468eb461facef672e417885fd/FLAG50199fb33 [2021-01-06 16:02:04,490 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:02:04,491 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c [2021-01-06 16:02:04,498 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0b8e184c9/62fc56b468eb461facef672e417885fd/FLAG50199fb33 [2021-01-06 16:02:04,881 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/0b8e184c9/62fc56b468eb461facef672e417885fd [2021-01-06 16:02:04,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:02:04,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:02:04,896 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:02:04,896 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:02:04,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:02:04,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:02:04" (1/1) ... [2021-01-06 16:02:04,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11b02345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:04, skipping insertion in model container [2021-01-06 16:02:04,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:02:04" (1/1) ... [2021-01-06 16:02:04,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:02:04,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:02:05,075 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/float-benchs/zonotope_3.c[604,617] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] [2021-01-06 16:02:05,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:02:05,107 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:02:05,121 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/float-benchs/zonotope_3.c[604,617] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] [2021-01-06 16:02:05,128 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:02:05,145 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:02:05,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05 WrapperNode [2021-01-06 16:02:05,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:02:05,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:02:05,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:02:05,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:02:05,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,166 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,190 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:02:05,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:02:05,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:02:05,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:02:05,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,216 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (1/1) ... [2021-01-06 16:02:05,218 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:02:05,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:02:05,220 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:02:05,220 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:02:05,221 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (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 16:02:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:02:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:02:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:02:05,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:02:05,796 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:02:05,799 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2021-01-06 16:02:05,801 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:02:05 BoogieIcfgContainer [2021-01-06 16:02:05,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:02:05,803 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:02:05,803 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:02:05,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:02:05,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:02:04" (1/3) ... [2021-01-06 16:02:05,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deb1738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:02:05, skipping insertion in model container [2021-01-06 16:02:05,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:02:05" (2/3) ... [2021-01-06 16:02:05,813 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5deb1738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:02:05, skipping insertion in model container [2021-01-06 16:02:05,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:02:05" (3/3) ... [2021-01-06 16:02:05,814 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2021-01-06 16:02:05,822 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:02:05,827 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:02:05,882 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:02:05,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:02:05,910 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:02:05,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:02:05,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:02:05,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:02:05,910 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:02:05,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:02:05,911 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:02:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2021-01-06 16:02:05,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 16:02:05,939 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:05,940 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:05,941 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:05,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:05,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1466747552, now seen corresponding path program 1 times [2021-01-06 16:02:05,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:05,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159693824] [2021-01-06 16:02:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,227 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 16:02:06,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159693824] [2021-01-06 16:02:06,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:02:06,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:02:06,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853684912] [2021-01-06 16:02:06,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:02:06,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:06,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:02:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:02:06,260 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2021-01-06 16:02:06,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:06,320 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-01-06 16:02:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:02:06,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-01-06 16:02:06,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:06,344 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:02:06,344 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 16:02:06,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:02:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 16:02:06,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2021-01-06 16:02:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:02:06,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-01-06 16:02:06,393 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2021-01-06 16:02:06,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:06,394 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-01-06 16:02:06,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:02:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-01-06 16:02:06,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:02:06,395 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:06,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:06,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:02:06,397 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:06,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:06,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1082938571, now seen corresponding path program 1 times [2021-01-06 16:02:06,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:06,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897409011] [2021-01-06 16:02:06,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,501 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 16:02:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897409011] [2021-01-06 16:02:06,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49435389] [2021-01-06 16:02:06,502 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 16:02:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:06,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 16:02:06,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:06,704 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 16:02:06,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:06,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-01-06 16:02:06,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721245264] [2021-01-06 16:02:06,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:02:06,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:06,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:02:06,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:02:06,708 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2021-01-06 16:02:06,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:06,746 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-01-06 16:02:06,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 16:02:06,747 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2021-01-06 16:02:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:06,749 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:02:06,749 INFO L226 Difference]: Without dead ends: 34 [2021-01-06 16:02:06,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 16:02:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-01-06 16:02:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2021-01-06 16:02:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2021-01-06 16:02:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-01-06 16:02:06,756 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2021-01-06 16:02:06,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:06,757 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-01-06 16:02:06,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:02:06,757 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-01-06 16:02:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 16:02:06,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:06,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:06,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:02:06,974 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:06,975 INFO L82 PathProgramCache]: Analyzing trace with hash 294705462, now seen corresponding path program 2 times [2021-01-06 16:02:06,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:06,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968407222] [2021-01-06 16:02:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:07,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968407222] [2021-01-06 16:02:07,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247125017] [2021-01-06 16:02:07,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:07,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:07,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:07,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2021-01-06 16:02:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:07,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:07,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 16:02:07,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241421993] [2021-01-06 16:02:07,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 16:02:07,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 16:02:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:02:07,381 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 6 states. [2021-01-06 16:02:07,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:07,417 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-01-06 16:02:07,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:02:07,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2021-01-06 16:02:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:07,420 INFO L225 Difference]: With dead ends: 46 [2021-01-06 16:02:07,420 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 16:02:07,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-01-06 16:02:07,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 16:02:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2021-01-06 16:02:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 16:02:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-01-06 16:02:07,429 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 26 [2021-01-06 16:02:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:07,429 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-01-06 16:02:07,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 16:02:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-01-06 16:02:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-01-06 16:02:07,431 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:07,431 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:07,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:07,643 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:07,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:07,644 INFO L82 PathProgramCache]: Analyzing trace with hash -529808735, now seen corresponding path program 3 times [2021-01-06 16:02:07,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:07,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864427073] [2021-01-06 16:02:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:07,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:07,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864427073] [2021-01-06 16:02:07,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879400872] [2021-01-06 16:02:07,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:07,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:02:07,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:07,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:02:07,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:07,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:07,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:02:07,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643093253] [2021-01-06 16:02:07,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:02:07,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:07,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:02:07,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:02:07,972 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 7 states. [2021-01-06 16:02:08,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:08,018 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-01-06 16:02:08,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:02:08,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2021-01-06 16:02:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:08,021 INFO L225 Difference]: With dead ends: 54 [2021-01-06 16:02:08,021 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:02:08,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 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 16:02:08,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:02:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-01-06 16:02:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 16:02:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-01-06 16:02:08,033 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 34 [2021-01-06 16:02:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:08,035 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-01-06 16:02:08,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:02:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-01-06 16:02:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-01-06 16:02:08,037 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:08,038 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:08,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:08,241 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:08,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1994920204, now seen corresponding path program 4 times [2021-01-06 16:02:08,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:08,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606319419] [2021-01-06 16:02:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:08,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606319419] [2021-01-06 16:02:08,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995472172] [2021-01-06 16:02:08,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:08,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:08,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:08,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:02:08,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:08,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:08,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 16:02:08,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142658682] [2021-01-06 16:02:08,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 16:02:08,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:08,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 16:02:08,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:02:08,689 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 8 states. [2021-01-06 16:02:08,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:08,750 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-01-06 16:02:08,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 16:02:08,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2021-01-06 16:02:08,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:08,753 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:02:08,753 INFO L226 Difference]: Without dead ends: 58 [2021-01-06 16:02:08,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:02:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-01-06 16:02:08,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2021-01-06 16:02:08,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 16:02:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-01-06 16:02:08,762 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 42 [2021-01-06 16:02:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:08,763 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-01-06 16:02:08,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 16:02:08,763 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-01-06 16:02:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-01-06 16:02:08,764 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:08,765 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:08,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:08,979 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:08,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:08,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1546599305, now seen corresponding path program 5 times [2021-01-06 16:02:08,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:08,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670778270] [2021-01-06 16:02:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:09,103 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:09,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670778270] [2021-01-06 16:02:09,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848283539] [2021-01-06 16:02:09,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:09,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:02:09,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2021-01-06 16:02:09,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:09,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:09,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 16:02:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439650059] [2021-01-06 16:02:09,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:02:09,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:09,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:02:09,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:02:09,372 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 9 states. [2021-01-06 16:02:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:09,425 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-01-06 16:02:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:02:09,426 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2021-01-06 16:02:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:09,427 INFO L225 Difference]: With dead ends: 70 [2021-01-06 16:02:09,427 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 16:02:09,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:02:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 16:02:09,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2021-01-06 16:02:09,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:02:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-01-06 16:02:09,436 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 50 [2021-01-06 16:02:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:09,437 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-01-06 16:02:09,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:02:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-01-06 16:02:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-01-06 16:02:09,439 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:09,439 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:09,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:02:09,654 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 988863714, now seen corresponding path program 6 times [2021-01-06 16:02:09,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:09,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931819932] [2021-01-06 16:02:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:09,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931819932] [2021-01-06 16:02:09,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284782336] [2021-01-06 16:02:09,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:09,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 16:02:09,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2021-01-06 16:02:09,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:10,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:10,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 16:02:10,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845482140] [2021-01-06 16:02:10,022 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:02:10,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:02:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:02:10,023 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 10 states. [2021-01-06 16:02:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:10,064 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-01-06 16:02:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:02:10,065 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2021-01-06 16:02:10,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:10,066 INFO L225 Difference]: With dead ends: 78 [2021-01-06 16:02:10,066 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 16:02:10,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 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 16:02:10,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 16:02:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2021-01-06 16:02:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 16:02:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-01-06 16:02:10,075 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 58 [2021-01-06 16:02:10,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:10,075 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-01-06 16:02:10,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:02:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-01-06 16:02:10,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 16:02:10,076 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:10,077 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:10,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:10,290 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash 353589837, now seen corresponding path program 7 times [2021-01-06 16:02:10,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:10,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829762373] [2021-01-06 16:02:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:10,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:10,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829762373] [2021-01-06 16:02:10,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822648271] [2021-01-06 16:02:10,415 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:10,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 16:02:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:10,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:10,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 16:02:10,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571029313] [2021-01-06 16:02:10,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 16:02:10,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:10,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 16:02:10,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-01-06 16:02:10,605 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 11 states. [2021-01-06 16:02:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:10,646 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-01-06 16:02:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 16:02:10,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2021-01-06 16:02:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:10,648 INFO L225 Difference]: With dead ends: 86 [2021-01-06 16:02:10,648 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 16:02:10,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 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 16:02:10,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 16:02:10,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-01-06 16:02:10,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 16:02:10,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-01-06 16:02:10,657 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 66 [2021-01-06 16:02:10,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:10,658 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-01-06 16:02:10,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 16:02:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-01-06 16:02:10,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-01-06 16:02:10,659 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:10,659 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:10,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:10,874 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash 268647608, now seen corresponding path program 8 times [2021-01-06 16:02:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399995438] [2021-01-06 16:02:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399995438] [2021-01-06 16:02:11,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617163250] [2021-01-06 16:02:11,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:11,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:11,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:11,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:02:11,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:11,248 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:11,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:11,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 16:02:11,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124509921] [2021-01-06 16:02:11,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:02:11,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:11,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:02:11,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:02:11,254 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 12 states. [2021-01-06 16:02:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:11,304 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-01-06 16:02:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:02:11,305 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2021-01-06 16:02:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:11,306 INFO L225 Difference]: With dead ends: 94 [2021-01-06 16:02:11,306 INFO L226 Difference]: Without dead ends: 90 [2021-01-06 16:02:11,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:02:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-01-06 16:02:11,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2021-01-06 16:02:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 16:02:11,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-01-06 16:02:11,334 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 74 [2021-01-06 16:02:11,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:11,334 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-01-06 16:02:11,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:02:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-01-06 16:02:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-01-06 16:02:11,338 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:11,338 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:11,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-01-06 16:02:11,539 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:11,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:11,539 INFO L82 PathProgramCache]: Analyzing trace with hash 244024355, now seen corresponding path program 9 times [2021-01-06 16:02:11,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:11,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173778382] [2021-01-06 16:02:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173778382] [2021-01-06 16:02:11,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032788060] [2021-01-06 16:02:11,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:11,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:02:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 16:02:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:11,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:11,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 16:02:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940373959] [2021-01-06 16:02:11,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:02:11,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:11,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:02:11,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:02:11,985 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 13 states. [2021-01-06 16:02:12,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:12,032 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-01-06 16:02:12,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 16:02:12,033 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2021-01-06 16:02:12,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:12,035 INFO L225 Difference]: With dead ends: 102 [2021-01-06 16:02:12,035 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 16:02:12,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 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 16:02:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 16:02:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2021-01-06 16:02:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-01-06 16:02:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-01-06 16:02:12,057 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 82 [2021-01-06 16:02:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:12,059 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-01-06 16:02:12,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:02:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-01-06 16:02:12,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-01-06 16:02:12,065 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:12,065 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:12,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:12,267 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:12,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:12,268 INFO L82 PathProgramCache]: Analyzing trace with hash -126406514, now seen corresponding path program 10 times [2021-01-06 16:02:12,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:12,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798513288] [2021-01-06 16:02:12,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:12,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798513288] [2021-01-06 16:02:12,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182092083] [2021-01-06 16:02:12,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:12,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:12,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:02:12,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:12,713 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:12,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:12,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 16:02:12,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197370272] [2021-01-06 16:02:12,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:02:12,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:12,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:02:12,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:02:12,716 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 14 states. [2021-01-06 16:02:12,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:12,776 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-01-06 16:02:12,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:02:12,777 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2021-01-06 16:02:12,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:12,778 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:02:12,778 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 16:02:12,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 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 16:02:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 16:02:12,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2021-01-06 16:02:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 16:02:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-01-06 16:02:12,785 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 90 [2021-01-06 16:02:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:12,785 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-01-06 16:02:12,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:02:12,785 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-01-06 16:02:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-01-06 16:02:12,786 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:12,787 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:13,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:13,001 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:13,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1164885511, now seen corresponding path program 11 times [2021-01-06 16:02:13,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:13,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232399169] [2021-01-06 16:02:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:13,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232399169] [2021-01-06 16:02:13,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936308744] [2021-01-06 16:02:13,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:13,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-01-06 16:02:13,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:13,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:02:13,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:13,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:13,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:02:13,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654084965] [2021-01-06 16:02:13,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:02:13,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:13,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:02:13,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:02:13,431 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 15 states. [2021-01-06 16:02:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:13,488 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-01-06 16:02:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:02:13,489 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2021-01-06 16:02:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:13,490 INFO L225 Difference]: With dead ends: 118 [2021-01-06 16:02:13,490 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 16:02:13,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:02:13,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 16:02:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2021-01-06 16:02:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2021-01-06 16:02:13,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-01-06 16:02:13,498 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 98 [2021-01-06 16:02:13,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:13,498 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-01-06 16:02:13,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:02:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-01-06 16:02:13,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-01-06 16:02:13,499 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:13,499 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:13,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-01-06 16:02:13,714 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:13,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:13,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1185200228, now seen corresponding path program 12 times [2021-01-06 16:02:13,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:13,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915904223] [2021-01-06 16:02:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:13,969 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915904223] [2021-01-06 16:02:13,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024268956] [2021-01-06 16:02:13,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:14,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-01-06 16:02:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 16:02:14,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:14,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:14,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 16:02:14,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919742267] [2021-01-06 16:02:14,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 16:02:14,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 16:02:14,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:02:14,339 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 16 states. [2021-01-06 16:02:14,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:14,407 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-01-06 16:02:14,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:02:14,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2021-01-06 16:02:14,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:14,408 INFO L225 Difference]: With dead ends: 126 [2021-01-06 16:02:14,408 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 16:02:14,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:02:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 16:02:14,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2021-01-06 16:02:14,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 16:02:14,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-01-06 16:02:14,414 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 106 [2021-01-06 16:02:14,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:14,415 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-01-06 16:02:14,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 16:02:14,415 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-01-06 16:02:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 16:02:14,419 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:14,419 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:14,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:02:14,633 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:14,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:14,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1820552241, now seen corresponding path program 13 times [2021-01-06 16:02:14,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:14,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744846057] [2021-01-06 16:02:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:14,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:14,870 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:14,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744846057] [2021-01-06 16:02:14,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905936326] [2021-01-06 16:02:14,871 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:14,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 16:02:14,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:15,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:15,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 16:02:15,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400933799] [2021-01-06 16:02:15,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 16:02:15,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:15,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 16:02:15,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:02:15,121 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 17 states. [2021-01-06 16:02:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:15,185 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-01-06 16:02:15,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 16:02:15,185 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2021-01-06 16:02:15,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:15,186 INFO L225 Difference]: With dead ends: 134 [2021-01-06 16:02:15,187 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 16:02:15,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:02:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 16:02:15,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2021-01-06 16:02:15,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2021-01-06 16:02:15,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-01-06 16:02:15,192 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 114 [2021-01-06 16:02:15,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:15,193 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-01-06 16:02:15,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 16:02:15,193 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-01-06 16:02:15,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-01-06 16:02:15,194 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:15,194 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:15,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:02:15,409 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:15,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1662790598, now seen corresponding path program 14 times [2021-01-06 16:02:15,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:15,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232584876] [2021-01-06 16:02:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:15,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:15,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232584876] [2021-01-06 16:02:15,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610412201] [2021-01-06 16:02:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:15,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:15,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:15,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:02:15,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:15,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:15,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:02:15,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085227230] [2021-01-06 16:02:15,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:02:15,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:15,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:02:15,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:02:15,927 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 18 states. [2021-01-06 16:02:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:15,998 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-01-06 16:02:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:02:15,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 122 [2021-01-06 16:02:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:16,000 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:02:16,000 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:02:16,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:02:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:02:16,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2021-01-06 16:02:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:02:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-01-06 16:02:16,009 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 122 [2021-01-06 16:02:16,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:16,009 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-01-06 16:02:16,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:02:16,009 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-01-06 16:02:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-01-06 16:02:16,011 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:16,011 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:16,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:16,227 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:16,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1671788965, now seen corresponding path program 15 times [2021-01-06 16:02:16,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:16,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460820856] [2021-01-06 16:02:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:16,490 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:16,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460820856] [2021-01-06 16:02:16,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163716202] [2021-01-06 16:02:16,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:16,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 16:02:16,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 16:02:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:16,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:16,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 16:02:16,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600811922] [2021-01-06 16:02:16,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 16:02:16,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 16:02:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-01-06 16:02:16,820 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 19 states. [2021-01-06 16:02:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:16,890 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-01-06 16:02:16,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 16:02:16,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2021-01-06 16:02:16,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:16,892 INFO L225 Difference]: With dead ends: 150 [2021-01-06 16:02:16,892 INFO L226 Difference]: Without dead ends: 146 [2021-01-06 16:02:16,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 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 16:02:16,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-01-06 16:02:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-01-06 16:02:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2021-01-06 16:02:16,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-01-06 16:02:16,898 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 130 [2021-01-06 16:02:16,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:16,899 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-01-06 16:02:16,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 16:02:16,899 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-01-06 16:02:16,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-01-06 16:02:16,900 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:16,900 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:17,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 16:02:17,114 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:17,115 INFO L82 PathProgramCache]: Analyzing trace with hash -309558256, now seen corresponding path program 16 times [2021-01-06 16:02:17,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:17,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603810155] [2021-01-06 16:02:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:17,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:17,385 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:17,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603810155] [2021-01-06 16:02:17,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148381761] [2021-01-06 16:02:17,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:17,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:17,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:17,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:02:17,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:17,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:17,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 16:02:17,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675551603] [2021-01-06 16:02:17,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:02:17,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:17,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:02:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:02:17,689 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 20 states. [2021-01-06 16:02:17,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:17,775 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-01-06 16:02:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 16:02:17,776 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 138 [2021-01-06 16:02:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:17,777 INFO L225 Difference]: With dead ends: 158 [2021-01-06 16:02:17,777 INFO L226 Difference]: Without dead ends: 154 [2021-01-06 16:02:17,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 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 16:02:17,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-01-06 16:02:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2021-01-06 16:02:17,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2021-01-06 16:02:17,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-01-06 16:02:17,784 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 138 [2021-01-06 16:02:17,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:17,784 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-01-06 16:02:17,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:02:17,784 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-01-06 16:02:17,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-01-06 16:02:17,786 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:17,786 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:18,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:02:18,001 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:18,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:18,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1164178299, now seen corresponding path program 17 times [2021-01-06 16:02:18,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:18,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444473864] [2021-01-06 16:02:18,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:18,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:18,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444473864] [2021-01-06 16:02:18,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956685717] [2021-01-06 16:02:18,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:18,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-01-06 16:02:18,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:18,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 16:02:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:18,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:18,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:18,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 16:02:18,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943038595] [2021-01-06 16:02:18,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 16:02:18,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:18,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 16:02:18,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:02:18,662 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 21 states. [2021-01-06 16:02:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:18,731 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-01-06 16:02:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 16:02:18,732 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2021-01-06 16:02:18,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:18,733 INFO L225 Difference]: With dead ends: 166 [2021-01-06 16:02:18,733 INFO L226 Difference]: Without dead ends: 162 [2021-01-06 16:02:18,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-01-06 16:02:18,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-01-06 16:02:18,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-01-06 16:02:18,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2021-01-06 16:02:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-01-06 16:02:18,740 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 146 [2021-01-06 16:02:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:18,740 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-01-06 16:02:18,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 16:02:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-01-06 16:02:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-01-06 16:02:18,742 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:18,742 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:18,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:02:18,957 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:18,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:18,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2062993382, now seen corresponding path program 18 times [2021-01-06 16:02:18,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:18,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707479418] [2021-01-06 16:02:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707479418] [2021-01-06 16:02:19,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807745112] [2021-01-06 16:02:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:19,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-01-06 16:02:19,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:19,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 16:02:19,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:19,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:19,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-01-06 16:02:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563876505] [2021-01-06 16:02:19,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:02:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:19,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:02:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:02:19,633 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 22 states. [2021-01-06 16:02:19,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:19,719 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-01-06 16:02:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:02:19,720 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2021-01-06 16:02:19,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:19,721 INFO L225 Difference]: With dead ends: 174 [2021-01-06 16:02:19,721 INFO L226 Difference]: Without dead ends: 170 [2021-01-06 16:02:19,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:02:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-01-06 16:02:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2021-01-06 16:02:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2021-01-06 16:02:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-01-06 16:02:19,728 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 154 [2021-01-06 16:02:19,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:19,728 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-01-06 16:02:19,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:02:19,728 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-01-06 16:02:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-01-06 16:02:19,730 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:19,730 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:19,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:19,944 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:19,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1559232175, now seen corresponding path program 19 times [2021-01-06 16:02:19,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:19,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117926429] [2021-01-06 16:02:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117926429] [2021-01-06 16:02:20,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669010594] [2021-01-06 16:02:20,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 16:02:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:20,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:20,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 16:02:20,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897007546] [2021-01-06 16:02:20,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 16:02:20,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:20,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 16:02:20,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-01-06 16:02:20,749 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 23 states. [2021-01-06 16:02:20,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:20,858 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-01-06 16:02:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 16:02:20,858 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 162 [2021-01-06 16:02:20,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:20,860 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:02:20,860 INFO L226 Difference]: Without dead ends: 178 [2021-01-06 16:02:20,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 162 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 16:02:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-01-06 16:02:20,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2021-01-06 16:02:20,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-01-06 16:02:20,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-01-06 16:02:20,868 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 162 [2021-01-06 16:02:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:20,868 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-01-06 16:02:20,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 16:02:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-01-06 16:02:20,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-01-06 16:02:20,870 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:20,870 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:21,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:21,084 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:21,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -679829572, now seen corresponding path program 20 times [2021-01-06 16:02:21,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:21,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759835528] [2021-01-06 16:02:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:21,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759835528] [2021-01-06 16:02:21,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254715871] [2021-01-06 16:02:21,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:02:21,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:21,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:02:21,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:21,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:21,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 16:02:21,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439823179] [2021-01-06 16:02:21,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 16:02:21,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:21,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 16:02:21,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:02:21,821 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 24 states. [2021-01-06 16:02:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:21,896 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-01-06 16:02:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 16:02:21,896 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2021-01-06 16:02:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:21,898 INFO L225 Difference]: With dead ends: 190 [2021-01-06 16:02:21,898 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:02:21,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-01-06 16:02:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:02:21,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2021-01-06 16:02:21,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2021-01-06 16:02:21,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-01-06 16:02:21,906 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 170 [2021-01-06 16:02:21,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:21,906 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-01-06 16:02:21,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 16:02:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-01-06 16:02:21,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-01-06 16:02:21,908 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:21,908 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:22,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 16:02:22,122 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash 922854183, now seen corresponding path program 21 times [2021-01-06 16:02:22,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:22,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632729692] [2021-01-06 16:02:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632729692] [2021-01-06 16:02:22,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474833900] [2021-01-06 16:02:22,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:22,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-01-06 16:02:22,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:22,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:02:22,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:22,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:02:22,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632781326] [2021-01-06 16:02:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:02:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:22,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:02:22,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:02:22,957 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 25 states. [2021-01-06 16:02:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:23,040 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-01-06 16:02:23,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:02:23,042 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 178 [2021-01-06 16:02:23,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:23,044 INFO L225 Difference]: With dead ends: 198 [2021-01-06 16:02:23,044 INFO L226 Difference]: Without dead ends: 194 [2021-01-06 16:02:23,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:02:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-01-06 16:02:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2021-01-06 16:02:23,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2021-01-06 16:02:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-01-06 16:02:23,050 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 178 [2021-01-06 16:02:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:23,051 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-01-06 16:02:23,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:02:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-01-06 16:02:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-01-06 16:02:23,053 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:23,053 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:23,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:02:23,267 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:23,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:23,268 INFO L82 PathProgramCache]: Analyzing trace with hash -445641838, now seen corresponding path program 22 times [2021-01-06 16:02:23,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:23,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020097557] [2021-01-06 16:02:23,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:23,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020097557] [2021-01-06 16:02:23,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634601096] [2021-01-06 16:02:23,709 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:23,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:23,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:02:23,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:24,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:24,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:02:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160211907] [2021-01-06 16:02:24,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:02:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:02:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:02:24,163 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 26 states. [2021-01-06 16:02:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:24,242 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-01-06 16:02:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:02:24,242 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2021-01-06 16:02:24,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:24,244 INFO L225 Difference]: With dead ends: 206 [2021-01-06 16:02:24,244 INFO L226 Difference]: Without dead ends: 202 [2021-01-06 16:02:24,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:02:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-01-06 16:02:24,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2021-01-06 16:02:24,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2021-01-06 16:02:24,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-01-06 16:02:24,252 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 186 [2021-01-06 16:02:24,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:24,252 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-01-06 16:02:24,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:02:24,253 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-01-06 16:02:24,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-01-06 16:02:24,255 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:24,255 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:24,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:24,471 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:24,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 194042109, now seen corresponding path program 23 times [2021-01-06 16:02:24,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:24,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319329614] [2021-01-06 16:02:24,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 2047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:24,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319329614] [2021-01-06 16:02:24,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44651882] [2021-01-06 16:02:24,922 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:25,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-01-06 16:02:25,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:25,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 16:02:25,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 2047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:25,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:25,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 16:02:25,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006931655] [2021-01-06 16:02:25,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:02:25,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:02:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:02:25,387 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 27 states. [2021-01-06 16:02:25,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:25,490 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-01-06 16:02:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 16:02:25,490 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 194 [2021-01-06 16:02:25,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:25,492 INFO L225 Difference]: With dead ends: 214 [2021-01-06 16:02:25,492 INFO L226 Difference]: Without dead ends: 210 [2021-01-06 16:02:25,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:02:25,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-01-06 16:02:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2021-01-06 16:02:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2021-01-06 16:02:25,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-01-06 16:02:25,500 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 194 [2021-01-06 16:02:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:25,501 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-01-06 16:02:25,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:02:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-01-06 16:02:25,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-01-06 16:02:25,502 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:25,502 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:25,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 16:02:25,716 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:25,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash -684782744, now seen corresponding path program 24 times [2021-01-06 16:02:25,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:25,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796982196] [2021-01-06 16:02:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:26,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796982196] [2021-01-06 16:02:26,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045846120] [2021-01-06 16:02:26,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:26,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-01-06 16:02:26,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:26,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 16:02:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:26,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:26,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:26,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-01-06 16:02:26,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320190206] [2021-01-06 16:02:26,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-01-06 16:02:26,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:26,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-01-06 16:02:26,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-01-06 16:02:26,689 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 28 states. [2021-01-06 16:02:26,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:26,803 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-01-06 16:02:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-01-06 16:02:26,804 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 202 [2021-01-06 16:02:26,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:26,806 INFO L225 Difference]: With dead ends: 222 [2021-01-06 16:02:26,806 INFO L226 Difference]: Without dead ends: 218 [2021-01-06 16:02:26,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 202 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 16:02:26,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-01-06 16:02:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2021-01-06 16:02:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2021-01-06 16:02:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-01-06 16:02:26,813 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 202 [2021-01-06 16:02:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:26,814 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-01-06 16:02:26,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2021-01-06 16:02:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-01-06 16:02:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-01-06 16:02:26,817 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:26,817 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:27,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:27,030 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash 2065015507, now seen corresponding path program 25 times [2021-01-06 16:02:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:27,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461619637] [2021-01-06 16:02:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 2425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:27,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461619637] [2021-01-06 16:02:27,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761840117] [2021-01-06 16:02:27,561 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 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 16:02:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:27,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 16:02:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:28,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 2425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:28,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:28,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:02:28,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380989110] [2021-01-06 16:02:28,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:02:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:28,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:02:28,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:02:28,008 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 29 states. [2021-01-06 16:02:28,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:28,121 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-01-06 16:02:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:02:28,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 210 [2021-01-06 16:02:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:28,123 INFO L225 Difference]: With dead ends: 230 [2021-01-06 16:02:28,123 INFO L226 Difference]: Without dead ends: 226 [2021-01-06 16:02:28,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:02:28,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-01-06 16:02:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2021-01-06 16:02:28,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2021-01-06 16:02:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-01-06 16:02:28,132 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 210 [2021-01-06 16:02:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:28,132 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-01-06 16:02:28,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:02:28,132 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-01-06 16:02:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-01-06 16:02:28,133 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:28,134 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:28,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 16:02:28,344 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash 789552958, now seen corresponding path program 26 times [2021-01-06 16:02:28,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:28,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867018825] [2021-01-06 16:02:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:28,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 0 proven. 2626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:28,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867018825] [2021-01-06 16:02:28,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591925766] [2021-01-06 16:02:28,906 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 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 16:02:29,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:29,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:29,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 28 conjunts are in the unsatisfiable core [2021-01-06 16:02:29,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 0 proven. 2626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:29,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:29,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-01-06 16:02:29,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084455605] [2021-01-06 16:02:29,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-01-06 16:02:29,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:29,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-01-06 16:02:29,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:02:29,418 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 30 states. [2021-01-06 16:02:29,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:29,517 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-01-06 16:02:29,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-01-06 16:02:29,518 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 218 [2021-01-06 16:02:29,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:29,519 INFO L225 Difference]: With dead ends: 238 [2021-01-06 16:02:29,520 INFO L226 Difference]: Without dead ends: 234 [2021-01-06 16:02:29,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-01-06 16:02:29,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-01-06 16:02:29,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2021-01-06 16:02:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2021-01-06 16:02:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-01-06 16:02:29,527 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 218 [2021-01-06 16:02:29,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:29,528 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-01-06 16:02:29,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2021-01-06 16:02:29,529 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-01-06 16:02:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-01-06 16:02:29,530 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:29,530 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:29,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:02:29,745 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:29,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:29,746 INFO L82 PathProgramCache]: Analyzing trace with hash 803733673, now seen corresponding path program 27 times [2021-01-06 16:02:29,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:29,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298756358] [2021-01-06 16:02:29,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:29,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2835 backedges. 0 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:30,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298756358] [2021-01-06 16:02:30,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092621737] [2021-01-06 16:02:30,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 16:02:30,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-01-06 16:02:30,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:30,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 16:02:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2835 backedges. 0 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:30,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:30,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-01-06 16:02:30,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487445956] [2021-01-06 16:02:30,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-01-06 16:02:30,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:30,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-01-06 16:02:30,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-01-06 16:02:30,865 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 31 states. [2021-01-06 16:02:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:30,984 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-01-06 16:02:30,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 16:02:30,984 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 226 [2021-01-06 16:02:30,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:30,986 INFO L225 Difference]: With dead ends: 246 [2021-01-06 16:02:30,986 INFO L226 Difference]: Without dead ends: 242 [2021-01-06 16:02:30,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 226 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 16:02:30,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-01-06 16:02:30,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2021-01-06 16:02:30,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2021-01-06 16:02:30,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-01-06 16:02:30,994 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 226 [2021-01-06 16:02:30,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:30,994 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-01-06 16:02:30,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2021-01-06 16:02:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-01-06 16:02:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-01-06 16:02:30,996 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:30,996 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:31,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 16:02:31,212 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:31,213 INFO L82 PathProgramCache]: Analyzing trace with hash -1083586796, now seen corresponding path program 28 times [2021-01-06 16:02:31,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:31,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532321888] [2021-01-06 16:02:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 0 proven. 3052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:31,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532321888] [2021-01-06 16:02:31,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947045025] [2021-01-06 16:02:31,897 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 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 16:02:32,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:32,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:32,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 30 conjunts are in the unsatisfiable core [2021-01-06 16:02:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 0 proven. 3052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:32,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:32,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 16:02:32,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090877448] [2021-01-06 16:02:32,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 16:02:32,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:32,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 16:02:32,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:02:32,360 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 32 states. [2021-01-06 16:02:32,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:32,501 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-01-06 16:02:32,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 16:02:32,502 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 234 [2021-01-06 16:02:32,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:32,504 INFO L225 Difference]: With dead ends: 254 [2021-01-06 16:02:32,504 INFO L226 Difference]: Without dead ends: 250 [2021-01-06 16:02:32,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-01-06 16:02:32,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-01-06 16:02:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2021-01-06 16:02:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2021-01-06 16:02:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-01-06 16:02:32,512 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 234 [2021-01-06 16:02:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:32,513 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-01-06 16:02:32,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 16:02:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-01-06 16:02:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-01-06 16:02:32,514 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:32,515 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:32,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 16:02:32,728 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:32,729 INFO L82 PathProgramCache]: Analyzing trace with hash 610267775, now seen corresponding path program 29 times [2021-01-06 16:02:32,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:32,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559774793] [2021-01-06 16:02:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:33,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559774793] [2021-01-06 16:02:33,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365506763] [2021-01-06 16:02:33,381 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 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 16:02:33,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-01-06 16:02:33,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:33,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 31 conjunts are in the unsatisfiable core [2021-01-06 16:02:33,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:33,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:33,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:33,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 16:02:33,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562961896] [2021-01-06 16:02:33,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 16:02:33,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:33,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 16:02:33,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:02:33,937 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 33 states. [2021-01-06 16:02:34,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:34,082 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-01-06 16:02:34,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 16:02:34,082 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 242 [2021-01-06 16:02:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:34,084 INFO L225 Difference]: With dead ends: 262 [2021-01-06 16:02:34,084 INFO L226 Difference]: Without dead ends: 258 [2021-01-06 16:02:34,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 16:02:34,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-01-06 16:02:34,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2021-01-06 16:02:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2021-01-06 16:02:34,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-01-06 16:02:34,094 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 242 [2021-01-06 16:02:34,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:34,094 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-01-06 16:02:34,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 16:02:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-01-06 16:02:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-01-06 16:02:34,096 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:34,097 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:34,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:34,313 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:34,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:34,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1433042198, now seen corresponding path program 30 times [2021-01-06 16:02:34,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:34,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377036543] [2021-01-06 16:02:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:35,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377036543] [2021-01-06 16:02:35,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619853781] [2021-01-06 16:02:35,123 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 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 16:02:35,417 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-01-06 16:02:35,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:35,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:02:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:35,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-01-06 16:02:35,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263198448] [2021-01-06 16:02:35,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-01-06 16:02:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:35,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-01-06 16:02:35,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:02:35,729 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 34 states. [2021-01-06 16:02:35,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:35,849 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-01-06 16:02:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-01-06 16:02:35,850 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 250 [2021-01-06 16:02:35,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:35,852 INFO L225 Difference]: With dead ends: 270 [2021-01-06 16:02:35,852 INFO L226 Difference]: Without dead ends: 266 [2021-01-06 16:02:35,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 16:02:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-01-06 16:02:35,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2021-01-06 16:02:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2021-01-06 16:02:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-01-06 16:02:35,860 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 250 [2021-01-06 16:02:35,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:35,860 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-01-06 16:02:35,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2021-01-06 16:02:35,861 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-01-06 16:02:35,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-01-06 16:02:35,862 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:35,862 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:36,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:36,076 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:36,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1563068331, now seen corresponding path program 31 times [2021-01-06 16:02:36,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:36,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868048387] [2021-01-06 16:02:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3751 backedges. 0 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:36,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868048387] [2021-01-06 16:02:36,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965520317] [2021-01-06 16:02:36,857 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 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 16:02:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:37,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 16:02:37,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:37,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3751 backedges. 0 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:37,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:37,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-01-06 16:02:37,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386770068] [2021-01-06 16:02:37,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:02:37,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:37,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:02:37,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:02:37,425 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 35 states. [2021-01-06 16:02:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:37,564 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2021-01-06 16:02:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:02:37,564 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 258 [2021-01-06 16:02:37,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:37,566 INFO L225 Difference]: With dead ends: 278 [2021-01-06 16:02:37,566 INFO L226 Difference]: Without dead ends: 274 [2021-01-06 16:02:37,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:02:37,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-01-06 16:02:37,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2021-01-06 16:02:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2021-01-06 16:02:37,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-01-06 16:02:37,575 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 258 [2021-01-06 16:02:37,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:37,575 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-01-06 16:02:37,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:02:37,576 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-01-06 16:02:37,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-01-06 16:02:37,577 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:37,577 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:37,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:37,792 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:37,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:37,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1659556544, now seen corresponding path program 32 times [2021-01-06 16:02:37,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:37,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613691037] [2021-01-06 16:02:37,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4000 backedges. 0 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613691037] [2021-01-06 16:02:38,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286095411] [2021-01-06 16:02:38,655 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 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 16:02:38,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:38,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 16:02:38,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:39,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4000 backedges. 0 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:39,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:39,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 16:02:39,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299811190] [2021-01-06 16:02:39,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 16:02:39,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:39,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 16:02:39,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:02:39,246 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 36 states. [2021-01-06 16:02:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:39,373 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2021-01-06 16:02:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 16:02:39,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 266 [2021-01-06 16:02:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:39,375 INFO L225 Difference]: With dead ends: 286 [2021-01-06 16:02:39,375 INFO L226 Difference]: Without dead ends: 282 [2021-01-06 16:02:39,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 16:02:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-01-06 16:02:39,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2021-01-06 16:02:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2021-01-06 16:02:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-01-06 16:02:39,383 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 266 [2021-01-06 16:02:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:39,384 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-01-06 16:02:39,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 16:02:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-01-06 16:02:39,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-01-06 16:02:39,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:39,386 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:39,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 16:02:39,601 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:39,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:39,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1168151083, now seen corresponding path program 33 times [2021-01-06 16:02:39,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:39,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592283928] [2021-01-06 16:02:39,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 0 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:40,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592283928] [2021-01-06 16:02:40,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980447896] [2021-01-06 16:02:40,417 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 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 16:02:40,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-01-06 16:02:40,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:40,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 35 conjunts are in the unsatisfiable core [2021-01-06 16:02:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 0 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:41,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:41,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 16:02:41,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438808740] [2021-01-06 16:02:41,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 16:02:41,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:41,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 16:02:41,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:02:41,035 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 37 states. [2021-01-06 16:02:41,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:41,184 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2021-01-06 16:02:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 16:02:41,184 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 274 [2021-01-06 16:02:41,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:41,186 INFO L225 Difference]: With dead ends: 294 [2021-01-06 16:02:41,186 INFO L226 Difference]: Without dead ends: 290 [2021-01-06 16:02:41,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:02:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-01-06 16:02:41,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 283. [2021-01-06 16:02:41,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2021-01-06 16:02:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2021-01-06 16:02:41,194 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 274 [2021-01-06 16:02:41,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:41,195 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2021-01-06 16:02:41,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 16:02:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2021-01-06 16:02:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-01-06 16:02:41,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:41,197 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:41,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:41,411 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:41,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:41,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1430145386, now seen corresponding path program 34 times [2021-01-06 16:02:41,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:41,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805246444] [2021-01-06 16:02:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:42,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805246444] [2021-01-06 16:02:42,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676097964] [2021-01-06 16:02:42,313 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 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 16:02:42,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:42,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:02:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:42,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:42,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:02:42,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475767096] [2021-01-06 16:02:42,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:02:42,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:42,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:02:42,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:02:42,868 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 38 states. [2021-01-06 16:02:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:43,010 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2021-01-06 16:02:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:02:43,011 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 282 [2021-01-06 16:02:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:43,013 INFO L225 Difference]: With dead ends: 302 [2021-01-06 16:02:43,013 INFO L226 Difference]: Without dead ends: 298 [2021-01-06 16:02:43,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:02:43,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-01-06 16:02:43,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2021-01-06 16:02:43,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2021-01-06 16:02:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2021-01-06 16:02:43,022 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 282 [2021-01-06 16:02:43,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:43,022 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2021-01-06 16:02:43,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:02:43,022 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2021-01-06 16:02:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-01-06 16:02:43,024 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:43,024 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:43,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 16:02:43,238 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:43,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:43,239 INFO L82 PathProgramCache]: Analyzing trace with hash -149340159, now seen corresponding path program 35 times [2021-01-06 16:02:43,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:43,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302399162] [2021-01-06 16:02:43,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:44,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:44,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302399162] [2021-01-06 16:02:44,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731873505] [2021-01-06 16:02:44,182 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 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 16:02:44,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-01-06 16:02:44,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:44,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-01-06 16:02:44,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:44,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:44,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-01-06 16:02:44,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535446662] [2021-01-06 16:02:44,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-01-06 16:02:44,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:44,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-01-06 16:02:44,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:02:44,870 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 39 states. [2021-01-06 16:02:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:45,047 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2021-01-06 16:02:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 16:02:45,047 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 290 [2021-01-06 16:02:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:45,049 INFO L225 Difference]: With dead ends: 310 [2021-01-06 16:02:45,049 INFO L226 Difference]: Without dead ends: 306 [2021-01-06 16:02:45,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 16:02:45,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-01-06 16:02:45,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2021-01-06 16:02:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2021-01-06 16:02:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2021-01-06 16:02:45,058 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 290 [2021-01-06 16:02:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:45,058 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2021-01-06 16:02:45,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2021-01-06 16:02:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2021-01-06 16:02:45,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-01-06 16:02:45,060 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:45,060 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:45,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:45,274 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:45,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:45,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1804456340, now seen corresponding path program 36 times [2021-01-06 16:02:45,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:45,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222192065] [2021-01-06 16:02:45,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:46,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222192065] [2021-01-06 16:02:46,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304819024] [2021-01-06 16:02:46,284 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 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 16:02:46,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-01-06 16:02:46,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:46,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:02:46,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:47,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:47,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 16:02:47,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520850480] [2021-01-06 16:02:47,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:02:47,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:47,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:02:47,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:02:47,077 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 40 states. [2021-01-06 16:02:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:47,244 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2021-01-06 16:02:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:02:47,245 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 298 [2021-01-06 16:02:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:47,247 INFO L225 Difference]: With dead ends: 318 [2021-01-06 16:02:47,247 INFO L226 Difference]: Without dead ends: 314 [2021-01-06 16:02:47,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:02:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-01-06 16:02:47,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2021-01-06 16:02:47,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2021-01-06 16:02:47,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2021-01-06 16:02:47,255 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 298 [2021-01-06 16:02:47,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:47,256 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2021-01-06 16:02:47,256 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:02:47,256 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2021-01-06 16:02:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-01-06 16:02:47,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:47,258 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:47,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 16:02:47,473 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash -241729065, now seen corresponding path program 37 times [2021-01-06 16:02:47,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:47,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545338115] [2021-01-06 16:02:47,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 0 proven. 5365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:48,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545338115] [2021-01-06 16:02:48,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626571545] [2021-01-06 16:02:48,486 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 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 16:02:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:48,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:02:48,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:49,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 0 proven. 5365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:49,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:49,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 16:02:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13532911] [2021-01-06 16:02:49,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:02:49,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:49,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:02:49,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:02:49,138 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 41 states. [2021-01-06 16:02:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:49,336 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2021-01-06 16:02:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 16:02:49,337 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 306 [2021-01-06 16:02:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:49,339 INFO L225 Difference]: With dead ends: 326 [2021-01-06 16:02:49,339 INFO L226 Difference]: Without dead ends: 322 [2021-01-06 16:02:49,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:02:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-01-06 16:02:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2021-01-06 16:02:49,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2021-01-06 16:02:49,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2021-01-06 16:02:49,348 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 306 [2021-01-06 16:02:49,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:49,348 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2021-01-06 16:02:49,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:02:49,348 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2021-01-06 16:02:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-01-06 16:02:49,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:49,350 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:49,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 16:02:49,565 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:49,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash -2108409278, now seen corresponding path program 38 times [2021-01-06 16:02:49,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:49,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453843865] [2021-01-06 16:02:49,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 0 proven. 5662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453843865] [2021-01-06 16:02:50,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2267077] [2021-01-06 16:02:50,752 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 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 16:02:51,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:02:51,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:51,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:02:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 0 proven. 5662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:51,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:51,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-01-06 16:02:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524873527] [2021-01-06 16:02:51,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-01-06 16:02:51,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-01-06 16:02:51,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:02:51,455 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 42 states. [2021-01-06 16:02:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:51,660 INFO L93 Difference]: Finished difference Result 334 states and 334 transitions. [2021-01-06 16:02:51,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 16:02:51,660 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 314 [2021-01-06 16:02:51,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:51,662 INFO L225 Difference]: With dead ends: 334 [2021-01-06 16:02:51,663 INFO L226 Difference]: Without dead ends: 330 [2021-01-06 16:02:51,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 16:02:51,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-01-06 16:02:51,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2021-01-06 16:02:51,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2021-01-06 16:02:51,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2021-01-06 16:02:51,672 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 314 [2021-01-06 16:02:51,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:51,673 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2021-01-06 16:02:51,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2021-01-06 16:02:51,674 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2021-01-06 16:02:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-01-06 16:02:51,676 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:51,676 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:51,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 16:02:51,890 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:51,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:51,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1082959955, now seen corresponding path program 39 times [2021-01-06 16:02:51,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:51,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033315695] [2021-01-06 16:02:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 5967 backedges. 0 proven. 5967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033315695] [2021-01-06 16:02:52,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755752193] [2021-01-06 16:02:52,987 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 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 16:02:53,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-01-06 16:02:53,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:53,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 16:02:53,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5967 backedges. 0 proven. 5967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:53,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:53,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:02:53,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684813544] [2021-01-06 16:02:53,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:02:53,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:53,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:02:53,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:02:53,745 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 43 states. [2021-01-06 16:02:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:53,938 INFO L93 Difference]: Finished difference Result 342 states and 342 transitions. [2021-01-06 16:02:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:02:53,938 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 322 [2021-01-06 16:02:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:53,940 INFO L225 Difference]: With dead ends: 342 [2021-01-06 16:02:53,940 INFO L226 Difference]: Without dead ends: 338 [2021-01-06 16:02:53,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:02:53,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-01-06 16:02:53,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 331. [2021-01-06 16:02:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2021-01-06 16:02:53,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2021-01-06 16:02:53,948 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 322 [2021-01-06 16:02:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:53,949 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2021-01-06 16:02:53,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:02:53,949 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2021-01-06 16:02:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-01-06 16:02:53,951 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:53,951 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:54,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 16:02:54,165 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:54,166 INFO L82 PathProgramCache]: Analyzing trace with hash 650107416, now seen corresponding path program 40 times [2021-01-06 16:02:54,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:54,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34854975] [2021-01-06 16:02:54,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6280 backedges. 0 proven. 6280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34854975] [2021-01-06 16:02:55,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85743066] [2021-01-06 16:02:55,351 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 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 16:02:55,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:02:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:55,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 42 conjunts are in the unsatisfiable core [2021-01-06 16:02:55,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6280 backedges. 0 proven. 6280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:56,092 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:56,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-01-06 16:02:56,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315209249] [2021-01-06 16:02:56,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 16:02:56,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:56,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 16:02:56,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:02:56,094 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 44 states. [2021-01-06 16:02:56,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:56,296 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2021-01-06 16:02:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 16:02:56,297 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 330 [2021-01-06 16:02:56,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:56,299 INFO L225 Difference]: With dead ends: 350 [2021-01-06 16:02:56,299 INFO L226 Difference]: Without dead ends: 346 [2021-01-06 16:02:56,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 16:02:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-01-06 16:02:56,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2021-01-06 16:02:56,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2021-01-06 16:02:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2021-01-06 16:02:56,308 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 330 [2021-01-06 16:02:56,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:56,309 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2021-01-06 16:02:56,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 16:02:56,309 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2021-01-06 16:02:56,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2021-01-06 16:02:56,311 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:56,311 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:56,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:02:56,525 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:56,526 INFO L82 PathProgramCache]: Analyzing trace with hash 990167427, now seen corresponding path program 41 times [2021-01-06 16:02:56,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:56,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65491364] [2021-01-06 16:02:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:02:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6601 backedges. 0 proven. 6601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:57,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65491364] [2021-01-06 16:02:57,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678445935] [2021-01-06 16:02:57,790 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 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 16:02:58,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:02:58,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:02:58,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 16:02:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:02:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6601 backedges. 0 proven. 6601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:02:58,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:02:58,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-01-06 16:02:58,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634388338] [2021-01-06 16:02:58,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-01-06 16:02:58,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:02:58,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-01-06 16:02:58,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:02:58,590 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 45 states. [2021-01-06 16:02:58,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:02:58,762 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2021-01-06 16:02:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-01-06 16:02:58,763 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 338 [2021-01-06 16:02:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:02:58,764 INFO L225 Difference]: With dead ends: 358 [2021-01-06 16:02:58,764 INFO L226 Difference]: Without dead ends: 354 [2021-01-06 16:02:58,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 16:02:58,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-01-06 16:02:58,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 347. [2021-01-06 16:02:58,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2021-01-06 16:02:58,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2021-01-06 16:02:58,775 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 338 [2021-01-06 16:02:58,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:02:58,776 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2021-01-06 16:02:58,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2021-01-06 16:02:58,776 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2021-01-06 16:02:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-01-06 16:02:58,778 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:02:58,778 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:02:58,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 16:02:58,993 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:02:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:02:58,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2079519250, now seen corresponding path program 42 times [2021-01-06 16:02:58,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:02:58,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504844770] [2021-01-06 16:02:58,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:02:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6930 backedges. 0 proven. 6930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:00,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504844770] [2021-01-06 16:03:00,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097018657] [2021-01-06 16:03:00,380 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 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 16:03:00,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-01-06 16:03:00,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:00,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 44 conjunts are in the unsatisfiable core [2021-01-06 16:03:00,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 6930 backedges. 0 proven. 6930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:01,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:01,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-01-06 16:03:01,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708166529] [2021-01-06 16:03:01,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-01-06 16:03:01,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:01,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-01-06 16:03:01,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:03:01,276 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 46 states. [2021-01-06 16:03:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:01,465 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2021-01-06 16:03:01,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 16:03:01,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 346 [2021-01-06 16:03:01,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:01,467 INFO L225 Difference]: With dead ends: 366 [2021-01-06 16:03:01,467 INFO L226 Difference]: Without dead ends: 362 [2021-01-06 16:03:01,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 16:03:01,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-01-06 16:03:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2021-01-06 16:03:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2021-01-06 16:03:01,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2021-01-06 16:03:01,474 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 346 [2021-01-06 16:03:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:01,474 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2021-01-06 16:03:01,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2021-01-06 16:03:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2021-01-06 16:03:01,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2021-01-06 16:03:01,476 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:01,476 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:01,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:01,677 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:01,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1901871271, now seen corresponding path program 43 times [2021-01-06 16:03:01,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:01,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191515557] [2021-01-06 16:03:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7267 backedges. 0 proven. 7267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:03,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191515557] [2021-01-06 16:03:03,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975519045] [2021-01-06 16:03:03,079 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:03,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:03,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:03:03,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:03,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7267 backedges. 0 proven. 7267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:03,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:03,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-01-06 16:03:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139261167] [2021-01-06 16:03:03,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-01-06 16:03:03,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:03,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-01-06 16:03:03,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:03:03,869 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 47 states. [2021-01-06 16:03:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:04,074 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2021-01-06 16:03:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:03:04,075 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 354 [2021-01-06 16:03:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:04,077 INFO L225 Difference]: With dead ends: 374 [2021-01-06 16:03:04,077 INFO L226 Difference]: Without dead ends: 370 [2021-01-06 16:03:04,077 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 16:03:04,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-01-06 16:03:04,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2021-01-06 16:03:04,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2021-01-06 16:03:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2021-01-06 16:03:04,085 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 354 [2021-01-06 16:03:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:04,085 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2021-01-06 16:03:04,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2021-01-06 16:03:04,086 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2021-01-06 16:03:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-01-06 16:03:04,087 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:04,088 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:04,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:04,297 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash -325855804, now seen corresponding path program 44 times [2021-01-06 16:03:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:04,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57228524] [2021-01-06 16:03:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7612 backedges. 0 proven. 7612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:05,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57228524] [2021-01-06 16:03:05,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295593613] [2021-01-06 16:03:05,761 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:06,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:06,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:03:06,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7612 backedges. 0 proven. 7612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:06,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:06,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-01-06 16:03:06,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86550238] [2021-01-06 16:03:06,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-01-06 16:03:06,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:06,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-01-06 16:03:06,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:03:06,644 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 48 states. [2021-01-06 16:03:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:06,841 INFO L93 Difference]: Finished difference Result 382 states and 382 transitions. [2021-01-06 16:03:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-01-06 16:03:06,841 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 362 [2021-01-06 16:03:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:06,843 INFO L225 Difference]: With dead ends: 382 [2021-01-06 16:03:06,843 INFO L226 Difference]: Without dead ends: 378 [2021-01-06 16:03:06,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 16:03:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-01-06 16:03:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2021-01-06 16:03:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2021-01-06 16:03:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2021-01-06 16:03:06,851 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 362 [2021-01-06 16:03:06,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:06,852 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2021-01-06 16:03:06,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2021-01-06 16:03:06,852 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2021-01-06 16:03:06,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-01-06 16:03:06,854 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:06,854 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:07,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 16:03:07,070 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:07,071 INFO L82 PathProgramCache]: Analyzing trace with hash 883446063, now seen corresponding path program 45 times [2021-01-06 16:03:07,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:07,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016973829] [2021-01-06 16:03:07,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7965 backedges. 0 proven. 7965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:08,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016973829] [2021-01-06 16:03:08,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890928653] [2021-01-06 16:03:08,611 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:09,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-01-06 16:03:09,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:09,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 47 conjunts are in the unsatisfiable core [2021-01-06 16:03:09,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7965 backedges. 0 proven. 7965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:09,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:09,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-01-06 16:03:09,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245668320] [2021-01-06 16:03:09,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-01-06 16:03:09,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:09,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-01-06 16:03:09,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:03:09,596 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 49 states. [2021-01-06 16:03:09,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:09,773 INFO L93 Difference]: Finished difference Result 390 states and 390 transitions. [2021-01-06 16:03:09,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-01-06 16:03:09,773 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 370 [2021-01-06 16:03:09,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:09,776 INFO L225 Difference]: With dead ends: 390 [2021-01-06 16:03:09,776 INFO L226 Difference]: Without dead ends: 386 [2021-01-06 16:03:09,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 16:03:09,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-01-06 16:03:09,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 379. [2021-01-06 16:03:09,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2021-01-06 16:03:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2021-01-06 16:03:09,783 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 370 [2021-01-06 16:03:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:09,783 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2021-01-06 16:03:09,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-01-06 16:03:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2021-01-06 16:03:09,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-01-06 16:03:09,785 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:09,785 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:09,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-01-06 16:03:09,986 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:09,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:09,987 INFO L82 PathProgramCache]: Analyzing trace with hash 44839322, now seen corresponding path program 46 times [2021-01-06 16:03:09,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:09,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708758769] [2021-01-06 16:03:09,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 0 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708758769] [2021-01-06 16:03:11,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504050598] [2021-01-06 16:03:11,595 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:11,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:11,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:11,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 48 conjunts are in the unsatisfiable core [2021-01-06 16:03:11,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:12,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 0 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:12,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:12,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-01-06 16:03:12,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667083182] [2021-01-06 16:03:12,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-01-06 16:03:12,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:12,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-01-06 16:03:12,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:03:12,439 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 50 states. [2021-01-06 16:03:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:12,674 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2021-01-06 16:03:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-01-06 16:03:12,674 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 378 [2021-01-06 16:03:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:12,676 INFO L225 Difference]: With dead ends: 398 [2021-01-06 16:03:12,676 INFO L226 Difference]: Without dead ends: 394 [2021-01-06 16:03:12,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 16:03:12,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-01-06 16:03:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 387. [2021-01-06 16:03:12,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2021-01-06 16:03:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2021-01-06 16:03:12,684 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 378 [2021-01-06 16:03:12,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:12,684 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2021-01-06 16:03:12,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2021-01-06 16:03:12,684 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2021-01-06 16:03:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-01-06 16:03:12,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:12,687 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:12,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 16:03:12,901 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:12,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:12,902 INFO L82 PathProgramCache]: Analyzing trace with hash -144017659, now seen corresponding path program 47 times [2021-01-06 16:03:12,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:12,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937681482] [2021-01-06 16:03:12,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 8695 backedges. 0 proven. 8695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937681482] [2021-01-06 16:03:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862759170] [2021-01-06 16:03:14,621 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:15,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-01-06 16:03:15,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:15,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 16:03:15,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8695 backedges. 0 proven. 8695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:15,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:15,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-01-06 16:03:15,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784549415] [2021-01-06 16:03:15,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:03:15,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:15,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:03:15,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:03:15,622 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 51 states. [2021-01-06 16:03:15,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:15,884 INFO L93 Difference]: Finished difference Result 406 states and 406 transitions. [2021-01-06 16:03:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:03:15,885 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 386 [2021-01-06 16:03:15,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:15,887 INFO L225 Difference]: With dead ends: 406 [2021-01-06 16:03:15,887 INFO L226 Difference]: Without dead ends: 402 [2021-01-06 16:03:15,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:03:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-01-06 16:03:15,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2021-01-06 16:03:15,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2021-01-06 16:03:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2021-01-06 16:03:15,895 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 386 [2021-01-06 16:03:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:15,896 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2021-01-06 16:03:15,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:03:15,896 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2021-01-06 16:03:15,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-01-06 16:03:15,898 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:15,898 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:16,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:16,112 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:16,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:16,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1196547728, now seen corresponding path program 48 times [2021-01-06 16:03:16,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:16,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770854383] [2021-01-06 16:03:16,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:17,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 0 proven. 9072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770854383] [2021-01-06 16:03:17,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040021004] [2021-01-06 16:03:17,823 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:18,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-01-06 16:03:18,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:18,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 50 conjunts are in the unsatisfiable core [2021-01-06 16:03:18,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 0 proven. 9072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:18,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:18,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-01-06 16:03:18,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659580090] [2021-01-06 16:03:18,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-01-06 16:03:18,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:18,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-01-06 16:03:18,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:03:18,841 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 52 states. [2021-01-06 16:03:19,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:19,052 INFO L93 Difference]: Finished difference Result 414 states and 414 transitions. [2021-01-06 16:03:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-01-06 16:03:19,052 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 394 [2021-01-06 16:03:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:19,055 INFO L225 Difference]: With dead ends: 414 [2021-01-06 16:03:19,055 INFO L226 Difference]: Without dead ends: 410 [2021-01-06 16:03:19,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:03:19,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-01-06 16:03:19,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 403. [2021-01-06 16:03:19,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2021-01-06 16:03:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2021-01-06 16:03:19,064 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 394 [2021-01-06 16:03:19,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:19,064 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2021-01-06 16:03:19,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2021-01-06 16:03:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2021-01-06 16:03:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-01-06 16:03:19,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:19,067 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:19,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 16:03:19,281 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:19,282 INFO L82 PathProgramCache]: Analyzing trace with hash -247320357, now seen corresponding path program 49 times [2021-01-06 16:03:19,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:19,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357687264] [2021-01-06 16:03:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:19,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 9457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:21,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357687264] [2021-01-06 16:03:21,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422860337] [2021-01-06 16:03:21,090 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:21,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 51 conjunts are in the unsatisfiable core [2021-01-06 16:03:21,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 9457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:22,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:22,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-01-06 16:03:22,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025044746] [2021-01-06 16:03:22,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-01-06 16:03:22,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:22,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-01-06 16:03:22,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:03:22,004 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 53 states. [2021-01-06 16:03:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:22,279 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2021-01-06 16:03:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 16:03:22,280 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 402 [2021-01-06 16:03:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:22,281 INFO L225 Difference]: With dead ends: 422 [2021-01-06 16:03:22,282 INFO L226 Difference]: Without dead ends: 418 [2021-01-06 16:03:22,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 16:03:22,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-01-06 16:03:22,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2021-01-06 16:03:22,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2021-01-06 16:03:22,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2021-01-06 16:03:22,288 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 402 [2021-01-06 16:03:22,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:22,289 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2021-01-06 16:03:22,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2021-01-06 16:03:22,289 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2021-01-06 16:03:22,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-01-06 16:03:22,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:22,292 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:22,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 16:03:22,507 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1358013766, now seen corresponding path program 50 times [2021-01-06 16:03:22,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:22,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171190685] [2021-01-06 16:03:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9850 backedges. 0 proven. 9850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:24,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171190685] [2021-01-06 16:03:24,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141790726] [2021-01-06 16:03:24,450 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:24,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:24,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 16:03:24,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9850 backedges. 0 proven. 9850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:25,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:25,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:03:25,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160582004] [2021-01-06 16:03:25,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:03:25,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:25,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:03:25,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:03:25,386 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 54 states. [2021-01-06 16:03:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:25,614 INFO L93 Difference]: Finished difference Result 430 states and 430 transitions. [2021-01-06 16:03:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:03:25,614 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 410 [2021-01-06 16:03:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:25,616 INFO L225 Difference]: With dead ends: 430 [2021-01-06 16:03:25,617 INFO L226 Difference]: Without dead ends: 426 [2021-01-06 16:03:25,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:03:25,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-01-06 16:03:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 419. [2021-01-06 16:03:25,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2021-01-06 16:03:25,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2021-01-06 16:03:25,625 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 410 [2021-01-06 16:03:25,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:25,626 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2021-01-06 16:03:25,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:03:25,626 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2021-01-06 16:03:25,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2021-01-06 16:03:25,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:25,629 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:25,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:25,842 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:25,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:25,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1937277263, now seen corresponding path program 51 times [2021-01-06 16:03:25,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:25,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097736549] [2021-01-06 16:03:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:27,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097736549] [2021-01-06 16:03:27,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332300320] [2021-01-06 16:03:27,854 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:28,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-01-06 16:03:28,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:28,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 53 conjunts are in the unsatisfiable core [2021-01-06 16:03:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:28,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:28,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:28,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-01-06 16:03:28,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892574958] [2021-01-06 16:03:28,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:03:28,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:03:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:03:28,956 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 55 states. [2021-01-06 16:03:29,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:29,183 INFO L93 Difference]: Finished difference Result 438 states and 438 transitions. [2021-01-06 16:03:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-01-06 16:03:29,184 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 418 [2021-01-06 16:03:29,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:29,186 INFO L225 Difference]: With dead ends: 438 [2021-01-06 16:03:29,186 INFO L226 Difference]: Without dead ends: 434 [2021-01-06 16:03:29,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:03:29,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-01-06 16:03:29,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 427. [2021-01-06 16:03:29,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2021-01-06 16:03:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2021-01-06 16:03:29,195 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 418 [2021-01-06 16:03:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:29,196 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2021-01-06 16:03:29,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:03:29,196 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2021-01-06 16:03:29,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-01-06 16:03:29,198 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:29,199 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:29,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 16:03:29,415 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:29,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1573829916, now seen corresponding path program 52 times [2021-01-06 16:03:29,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:29,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117864111] [2021-01-06 16:03:29,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10660 backedges. 0 proven. 10660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:31,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117864111] [2021-01-06 16:03:31,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325116442] [2021-01-06 16:03:31,432 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:31,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:31,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:31,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:03:31,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10660 backedges. 0 proven. 10660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:32,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:32,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-01-06 16:03:32,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068520535] [2021-01-06 16:03:32,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-01-06 16:03:32,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:32,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-01-06 16:03:32,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:03:32,404 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 56 states. [2021-01-06 16:03:32,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:32,618 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2021-01-06 16:03:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-01-06 16:03:32,618 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 426 [2021-01-06 16:03:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:32,620 INFO L225 Difference]: With dead ends: 446 [2021-01-06 16:03:32,620 INFO L226 Difference]: Without dead ends: 442 [2021-01-06 16:03:32,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 16:03:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-01-06 16:03:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2021-01-06 16:03:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2021-01-06 16:03:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2021-01-06 16:03:32,626 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 426 [2021-01-06 16:03:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:32,627 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2021-01-06 16:03:32,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2021-01-06 16:03:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2021-01-06 16:03:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-01-06 16:03:32,628 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:32,629 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:32,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:32,830 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:32,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:32,831 INFO L82 PathProgramCache]: Analyzing trace with hash -2087559033, now seen corresponding path program 53 times [2021-01-06 16:03:32,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:32,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809114719] [2021-01-06 16:03:32,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11077 backedges. 0 proven. 11077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:34,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809114719] [2021-01-06 16:03:34,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853453583] [2021-01-06 16:03:34,996 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:35,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-01-06 16:03:35,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:03:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11077 backedges. 0 proven. 11077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:36,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:36,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-01-06 16:03:36,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111805848] [2021-01-06 16:03:36,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 16:03:36,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 16:03:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:03:36,128 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 57 states. [2021-01-06 16:03:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:36,384 INFO L93 Difference]: Finished difference Result 454 states and 454 transitions. [2021-01-06 16:03:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:03:36,384 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 434 [2021-01-06 16:03:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:36,386 INFO L225 Difference]: With dead ends: 454 [2021-01-06 16:03:36,386 INFO L226 Difference]: Without dead ends: 450 [2021-01-06 16:03:36,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:03:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-01-06 16:03:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2021-01-06 16:03:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2021-01-06 16:03:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2021-01-06 16:03:36,393 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 434 [2021-01-06 16:03:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:36,394 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2021-01-06 16:03:36,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 16:03:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2021-01-06 16:03:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2021-01-06 16:03:36,396 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:36,397 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:36,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-01-06 16:03:36,611 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:36,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1046648590, now seen corresponding path program 54 times [2021-01-06 16:03:36,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:36,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413751233] [2021-01-06 16:03:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:36,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 11502 backedges. 0 proven. 11502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413751233] [2021-01-06 16:03:38,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229009285] [2021-01-06 16:03:38,852 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:39,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-01-06 16:03:39,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 56 conjunts are in the unsatisfiable core [2021-01-06 16:03:39,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 11502 backedges. 0 proven. 11502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:40,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:40,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-01-06 16:03:40,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145879922] [2021-01-06 16:03:40,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-01-06 16:03:40,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:40,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-01-06 16:03:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:03:40,020 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 58 states. [2021-01-06 16:03:40,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:40,305 INFO L93 Difference]: Finished difference Result 462 states and 462 transitions. [2021-01-06 16:03:40,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-01-06 16:03:40,306 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 442 [2021-01-06 16:03:40,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:40,307 INFO L225 Difference]: With dead ends: 462 [2021-01-06 16:03:40,307 INFO L226 Difference]: Without dead ends: 458 [2021-01-06 16:03:40,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-01-06 16:03:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-01-06 16:03:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 451. [2021-01-06 16:03:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2021-01-06 16:03:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2021-01-06 16:03:40,316 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 442 [2021-01-06 16:03:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:40,317 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2021-01-06 16:03:40,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2021-01-06 16:03:40,317 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2021-01-06 16:03:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2021-01-06 16:03:40,319 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:40,320 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:40,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 16:03:40,534 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:40,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:40,535 INFO L82 PathProgramCache]: Analyzing trace with hash -524626339, now seen corresponding path program 55 times [2021-01-06 16:03:40,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:40,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131918929] [2021-01-06 16:03:40,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:42,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131918929] [2021-01-06 16:03:42,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49835697] [2021-01-06 16:03:42,844 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:43,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 16:03:43,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:43,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:43,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-01-06 16:03:43,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594129897] [2021-01-06 16:03:43,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-01-06 16:03:43,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:43,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-01-06 16:03:43,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:03:43,893 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 59 states. [2021-01-06 16:03:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:44,254 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2021-01-06 16:03:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 16:03:44,255 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 450 [2021-01-06 16:03:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:44,257 INFO L225 Difference]: With dead ends: 470 [2021-01-06 16:03:44,257 INFO L226 Difference]: Without dead ends: 466 [2021-01-06 16:03:44,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 16:03:44,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-01-06 16:03:44,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 459. [2021-01-06 16:03:44,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2021-01-06 16:03:44,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 459 transitions. [2021-01-06 16:03:44,267 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 459 transitions. Word has length 450 [2021-01-06 16:03:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:44,267 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 459 transitions. [2021-01-06 16:03:44,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2021-01-06 16:03:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 459 transitions. [2021-01-06 16:03:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2021-01-06 16:03:44,270 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:44,270 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:44,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:44,485 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:44,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1363826488, now seen corresponding path program 56 times [2021-01-06 16:03:44,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:44,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128220711] [2021-01-06 16:03:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128220711] [2021-01-06 16:03:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370666926] [2021-01-06 16:03:46,889 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:47,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:03:47,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:47,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:03:47,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:47,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:47,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:47,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-01-06 16:03:47,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151207198] [2021-01-06 16:03:47,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-01-06 16:03:47,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:47,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-01-06 16:03:47,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:03:47,963 INFO L87 Difference]: Start difference. First operand 459 states and 459 transitions. Second operand 60 states. [2021-01-06 16:03:48,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:48,238 INFO L93 Difference]: Finished difference Result 478 states and 478 transitions. [2021-01-06 16:03:48,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-01-06 16:03:48,238 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 458 [2021-01-06 16:03:48,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:48,240 INFO L225 Difference]: With dead ends: 478 [2021-01-06 16:03:48,240 INFO L226 Difference]: Without dead ends: 474 [2021-01-06 16:03:48,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-01-06 16:03:48,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-01-06 16:03:48,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2021-01-06 16:03:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2021-01-06 16:03:48,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 467 transitions. [2021-01-06 16:03:48,248 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 467 transitions. Word has length 458 [2021-01-06 16:03:48,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:48,248 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 467 transitions. [2021-01-06 16:03:48,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2021-01-06 16:03:48,248 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 467 transitions. [2021-01-06 16:03:48,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-01-06 16:03:48,251 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:48,251 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:48,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 16:03:48,463 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:48,464 INFO L82 PathProgramCache]: Analyzing trace with hash -27729869, now seen corresponding path program 57 times [2021-01-06 16:03:48,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:48,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567287949] [2021-01-06 16:03:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:48,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:50,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12825 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:50,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567287949] [2021-01-06 16:03:50,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027150419] [2021-01-06 16:03:50,917 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:51,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-01-06 16:03:51,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:51,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:03:51,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:52,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12825 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:52,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:52,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-01-06 16:03:52,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529472019] [2021-01-06 16:03:52,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:03:52,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:52,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:03:52,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:03:52,197 INFO L87 Difference]: Start difference. First operand 467 states and 467 transitions. Second operand 61 states. [2021-01-06 16:03:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:52,501 INFO L93 Difference]: Finished difference Result 486 states and 486 transitions. [2021-01-06 16:03:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-01-06 16:03:52,501 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 466 [2021-01-06 16:03:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:52,503 INFO L225 Difference]: With dead ends: 486 [2021-01-06 16:03:52,503 INFO L226 Difference]: Without dead ends: 482 [2021-01-06 16:03:52,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:03:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-01-06 16:03:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2021-01-06 16:03:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2021-01-06 16:03:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 475 transitions. [2021-01-06 16:03:52,512 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 475 transitions. Word has length 466 [2021-01-06 16:03:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:52,512 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 475 transitions. [2021-01-06 16:03:52,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:03:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 475 transitions. [2021-01-06 16:03:52,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-01-06 16:03:52,516 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:52,516 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:52,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:52,724 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:52,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1485865826, now seen corresponding path program 58 times [2021-01-06 16:03:52,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:52,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309963876] [2021-01-06 16:03:52,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 13282 backedges. 0 proven. 13282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:55,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309963876] [2021-01-06 16:03:55,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615952485] [2021-01-06 16:03:55,256 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:03:55,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:03:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:03:55,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 60 conjunts are in the unsatisfiable core [2021-01-06 16:03:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:03:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 13282 backedges. 0 proven. 13282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:56,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:03:56,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-01-06 16:03:56,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790772320] [2021-01-06 16:03:56,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-01-06 16:03:56,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:03:56,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-01-06 16:03:56,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:03:56,505 INFO L87 Difference]: Start difference. First operand 475 states and 475 transitions. Second operand 62 states. [2021-01-06 16:03:56,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:03:56,840 INFO L93 Difference]: Finished difference Result 494 states and 494 transitions. [2021-01-06 16:03:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-01-06 16:03:56,840 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 474 [2021-01-06 16:03:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:03:56,842 INFO L225 Difference]: With dead ends: 494 [2021-01-06 16:03:56,842 INFO L226 Difference]: Without dead ends: 490 [2021-01-06 16:03:56,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 16:03:56,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-01-06 16:03:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 483. [2021-01-06 16:03:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2021-01-06 16:03:56,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 483 transitions. [2021-01-06 16:03:56,850 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 483 transitions. Word has length 474 [2021-01-06 16:03:56,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:03:56,850 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 483 transitions. [2021-01-06 16:03:56,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2021-01-06 16:03:56,850 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 483 transitions. [2021-01-06 16:03:56,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-01-06 16:03:56,853 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:03:56,853 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:03:57,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 16:03:57,069 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:03:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:03:57,070 INFO L82 PathProgramCache]: Analyzing trace with hash -2033943031, now seen corresponding path program 59 times [2021-01-06 16:03:57,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:03:57,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665589520] [2021-01-06 16:03:57,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:03:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:03:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13747 backedges. 0 proven. 13747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:03:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665589520] [2021-01-06 16:03:59,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370943224] [2021-01-06 16:03:59,689 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:00,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-01-06 16:04:00,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:00,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 16:04:00,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:01,004 INFO L134 CoverageAnalysis]: Checked inductivity of 13747 backedges. 0 proven. 13747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:01,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:01,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-01-06 16:04:01,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251024965] [2021-01-06 16:04:01,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-01-06 16:04:01,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:01,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-01-06 16:04:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:04:01,006 INFO L87 Difference]: Start difference. First operand 483 states and 483 transitions. Second operand 63 states. [2021-01-06 16:04:01,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:01,284 INFO L93 Difference]: Finished difference Result 502 states and 502 transitions. [2021-01-06 16:04:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-01-06 16:04:01,285 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 482 [2021-01-06 16:04:01,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:01,287 INFO L225 Difference]: With dead ends: 502 [2021-01-06 16:04:01,287 INFO L226 Difference]: Without dead ends: 498 [2021-01-06 16:04:01,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 16:04:01,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-01-06 16:04:01,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 491. [2021-01-06 16:04:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2021-01-06 16:04:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 491 transitions. [2021-01-06 16:04:01,294 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 491 transitions. Word has length 482 [2021-01-06 16:04:01,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:01,295 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 491 transitions. [2021-01-06 16:04:01,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2021-01-06 16:04:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 491 transitions. [2021-01-06 16:04:01,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2021-01-06 16:04:01,297 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:01,297 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:01,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 16:04:01,498 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:01,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:01,499 INFO L82 PathProgramCache]: Analyzing trace with hash 2116215924, now seen corresponding path program 60 times [2021-01-06 16:04:01,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:01,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480547765] [2021-01-06 16:04:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:04,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14220 backedges. 0 proven. 14220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480547765] [2021-01-06 16:04:04,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138505051] [2021-01-06 16:04:04,244 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:04,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-01-06 16:04:04,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:04,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 62 conjunts are in the unsatisfiable core [2021-01-06 16:04:04,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:05,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14220 backedges. 0 proven. 14220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:05,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:05,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-01-06 16:04:05,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871251444] [2021-01-06 16:04:05,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-01-06 16:04:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:05,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-01-06 16:04:05,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:04:05,584 INFO L87 Difference]: Start difference. First operand 491 states and 491 transitions. Second operand 64 states. [2021-01-06 16:04:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:05,918 INFO L93 Difference]: Finished difference Result 510 states and 510 transitions. [2021-01-06 16:04:05,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-01-06 16:04:05,918 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 490 [2021-01-06 16:04:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:05,920 INFO L225 Difference]: With dead ends: 510 [2021-01-06 16:04:05,920 INFO L226 Difference]: Without dead ends: 506 [2021-01-06 16:04:05,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-01-06 16:04:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-01-06 16:04:05,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2021-01-06 16:04:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2021-01-06 16:04:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 499 transitions. [2021-01-06 16:04:05,928 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 499 transitions. Word has length 490 [2021-01-06 16:04:05,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:05,928 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 499 transitions. [2021-01-06 16:04:05,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2021-01-06 16:04:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 499 transitions. [2021-01-06 16:04:05,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-01-06 16:04:05,931 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:05,931 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:06,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:06,146 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:06,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:06,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1951772639, now seen corresponding path program 61 times [2021-01-06 16:04:06,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:06,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856381750] [2021-01-06 16:04:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:08,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 0 proven. 14701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:08,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856381750] [2021-01-06 16:04:08,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654274595] [2021-01-06 16:04:08,995 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 63 conjunts are in the unsatisfiable core [2021-01-06 16:04:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 0 proven. 14701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:10,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:10,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-01-06 16:04:10,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73558349] [2021-01-06 16:04:10,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-01-06 16:04:10,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:10,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-01-06 16:04:10,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:04:10,271 INFO L87 Difference]: Start difference. First operand 499 states and 499 transitions. Second operand 65 states. [2021-01-06 16:04:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:10,641 INFO L93 Difference]: Finished difference Result 518 states and 518 transitions. [2021-01-06 16:04:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-01-06 16:04:10,642 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 498 [2021-01-06 16:04:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:10,645 INFO L225 Difference]: With dead ends: 518 [2021-01-06 16:04:10,645 INFO L226 Difference]: Without dead ends: 514 [2021-01-06 16:04:10,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-01-06 16:04:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-01-06 16:04:10,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 507. [2021-01-06 16:04:10,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2021-01-06 16:04:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 507 transitions. [2021-01-06 16:04:10,655 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 507 transitions. Word has length 498 [2021-01-06 16:04:10,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:10,655 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 507 transitions. [2021-01-06 16:04:10,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2021-01-06 16:04:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 507 transitions. [2021-01-06 16:04:10,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-01-06 16:04:10,658 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:10,659 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:10,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:10,874 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:10,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1428676682, now seen corresponding path program 62 times [2021-01-06 16:04:10,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:10,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399363892] [2021-01-06 16:04:10,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:13,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15190 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:13,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399363892] [2021-01-06 16:04:13,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665305632] [2021-01-06 16:04:13,785 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:14,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:04:14,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 64 conjunts are in the unsatisfiable core [2021-01-06 16:04:14,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:14,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15190 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:14,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:14,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-01-06 16:04:14,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305785757] [2021-01-06 16:04:14,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-01-06 16:04:14,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-01-06 16:04:14,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:04:14,985 INFO L87 Difference]: Start difference. First operand 507 states and 507 transitions. Second operand 66 states. [2021-01-06 16:04:15,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:15,345 INFO L93 Difference]: Finished difference Result 526 states and 526 transitions. [2021-01-06 16:04:15,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-01-06 16:04:15,345 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 506 [2021-01-06 16:04:15,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:15,347 INFO L225 Difference]: With dead ends: 526 [2021-01-06 16:04:15,347 INFO L226 Difference]: Without dead ends: 522 [2021-01-06 16:04:15,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-01-06 16:04:15,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-01-06 16:04:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 515. [2021-01-06 16:04:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2021-01-06 16:04:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2021-01-06 16:04:15,354 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 506 [2021-01-06 16:04:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:15,354 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2021-01-06 16:04:15,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2021-01-06 16:04:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2021-01-06 16:04:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2021-01-06 16:04:15,356 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:15,357 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:15,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:15,557 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:15,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 291796405, now seen corresponding path program 63 times [2021-01-06 16:04:15,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:15,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635073217] [2021-01-06 16:04:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:15,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:18,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15687 backedges. 0 proven. 15687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:18,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635073217] [2021-01-06 16:04:18,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558081546] [2021-01-06 16:04:18,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:19,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-01-06 16:04:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:19,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:04:19,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 15687 backedges. 0 proven. 15687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:20,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:20,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-01-06 16:04:20,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871129061] [2021-01-06 16:04:20,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-01-06 16:04:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-01-06 16:04:20,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:04:20,038 INFO L87 Difference]: Start difference. First operand 515 states and 515 transitions. Second operand 67 states. [2021-01-06 16:04:20,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:20,367 INFO L93 Difference]: Finished difference Result 534 states and 534 transitions. [2021-01-06 16:04:20,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-01-06 16:04:20,368 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 514 [2021-01-06 16:04:20,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:20,371 INFO L225 Difference]: With dead ends: 534 [2021-01-06 16:04:20,371 INFO L226 Difference]: Without dead ends: 530 [2021-01-06 16:04:20,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-01-06 16:04:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-01-06 16:04:20,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 523. [2021-01-06 16:04:20,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2021-01-06 16:04:20,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 523 transitions. [2021-01-06 16:04:20,379 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 523 transitions. Word has length 514 [2021-01-06 16:04:20,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:20,379 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 523 transitions. [2021-01-06 16:04:20,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2021-01-06 16:04:20,379 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 523 transitions. [2021-01-06 16:04:20,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-01-06 16:04:20,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:20,382 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:20,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:20,583 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:20,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:20,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1630113760, now seen corresponding path program 64 times [2021-01-06 16:04:20,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:20,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31156322] [2021-01-06 16:04:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:23,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16192 backedges. 0 proven. 16192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31156322] [2021-01-06 16:04:23,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365130102] [2021-01-06 16:04:23,747 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:24,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:04:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:24,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 2177 conjuncts, 66 conjunts are in the unsatisfiable core [2021-01-06 16:04:24,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16192 backedges. 0 proven. 16192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:25,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:25,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-01-06 16:04:25,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759295790] [2021-01-06 16:04:25,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-01-06 16:04:25,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:25,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-01-06 16:04:25,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:04:25,003 INFO L87 Difference]: Start difference. First operand 523 states and 523 transitions. Second operand 68 states. [2021-01-06 16:04:25,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:25,381 INFO L93 Difference]: Finished difference Result 542 states and 542 transitions. [2021-01-06 16:04:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-01-06 16:04:25,381 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 522 [2021-01-06 16:04:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:25,383 INFO L225 Difference]: With dead ends: 542 [2021-01-06 16:04:25,383 INFO L226 Difference]: Without dead ends: 538 [2021-01-06 16:04:25,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-01-06 16:04:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-01-06 16:04:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 531. [2021-01-06 16:04:25,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2021-01-06 16:04:25,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 531 transitions. [2021-01-06 16:04:25,390 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 531 transitions. Word has length 522 [2021-01-06 16:04:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:25,390 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 531 transitions. [2021-01-06 16:04:25,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2021-01-06 16:04:25,391 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 531 transitions. [2021-01-06 16:04:25,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-01-06 16:04:25,393 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:25,393 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:25,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:25,601 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:25,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:25,602 INFO L82 PathProgramCache]: Analyzing trace with hash -129446005, now seen corresponding path program 65 times [2021-01-06 16:04:25,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:25,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252490159] [2021-01-06 16:04:25,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:28,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16705 backedges. 0 proven. 16705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:28,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252490159] [2021-01-06 16:04:28,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096622636] [2021-01-06 16:04:28,898 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:29,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-01-06 16:04:29,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 2210 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 16:04:29,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:30,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16705 backedges. 0 proven. 16705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:30,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:30,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-01-06 16:04:30,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140676635] [2021-01-06 16:04:30,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-01-06 16:04:30,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:30,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-01-06 16:04:30,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:04:30,448 INFO L87 Difference]: Start difference. First operand 531 states and 531 transitions. Second operand 69 states. [2021-01-06 16:04:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:30,768 INFO L93 Difference]: Finished difference Result 550 states and 550 transitions. [2021-01-06 16:04:30,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:04:30,783 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 530 [2021-01-06 16:04:30,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:30,785 INFO L225 Difference]: With dead ends: 550 [2021-01-06 16:04:30,785 INFO L226 Difference]: Without dead ends: 546 [2021-01-06 16:04:30,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-01-06 16:04:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-01-06 16:04:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 539. [2021-01-06 16:04:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2021-01-06 16:04:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2021-01-06 16:04:30,792 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 530 [2021-01-06 16:04:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:30,793 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2021-01-06 16:04:30,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2021-01-06 16:04:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2021-01-06 16:04:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2021-01-06 16:04:30,795 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:30,795 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:30,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 16:04:30,996 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:30,997 INFO L82 PathProgramCache]: Analyzing trace with hash 495358966, now seen corresponding path program 66 times [2021-01-06 16:04:30,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:30,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225521946] [2021-01-06 16:04:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17226 backedges. 0 proven. 17226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:34,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225521946] [2021-01-06 16:04:34,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030362112] [2021-01-06 16:04:34,326 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:35,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-01-06 16:04:35,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:35,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 68 conjunts are in the unsatisfiable core [2021-01-06 16:04:35,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17226 backedges. 0 proven. 17226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:35,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:35,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-01-06 16:04:35,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566026999] [2021-01-06 16:04:35,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-01-06 16:04:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-01-06 16:04:35,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:04:35,893 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 70 states. [2021-01-06 16:04:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:36,307 INFO L93 Difference]: Finished difference Result 558 states and 558 transitions. [2021-01-06 16:04:36,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-01-06 16:04:36,307 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 538 [2021-01-06 16:04:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:36,309 INFO L225 Difference]: With dead ends: 558 [2021-01-06 16:04:36,309 INFO L226 Difference]: Without dead ends: 554 [2021-01-06 16:04:36,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-01-06 16:04:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-01-06 16:04:36,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 547. [2021-01-06 16:04:36,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2021-01-06 16:04:36,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 547 transitions. [2021-01-06 16:04:36,316 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 547 transitions. Word has length 538 [2021-01-06 16:04:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:36,316 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 547 transitions. [2021-01-06 16:04:36,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2021-01-06 16:04:36,316 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 547 transitions. [2021-01-06 16:04:36,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-01-06 16:04:36,319 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:36,319 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:36,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-01-06 16:04:36,531 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:36,532 INFO L82 PathProgramCache]: Analyzing trace with hash 324713825, now seen corresponding path program 67 times [2021-01-06 16:04:36,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:36,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820808993] [2021-01-06 16:04:36,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:36,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17755 backedges. 0 proven. 17755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:39,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820808993] [2021-01-06 16:04:39,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532597655] [2021-01-06 16:04:39,959 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:40,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 2276 conjuncts, 69 conjunts are in the unsatisfiable core [2021-01-06 16:04:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 17755 backedges. 0 proven. 17755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:41,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:41,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-01-06 16:04:41,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892381423] [2021-01-06 16:04:41,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-01-06 16:04:41,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:41,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-01-06 16:04:41,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:04:41,294 INFO L87 Difference]: Start difference. First operand 547 states and 547 transitions. Second operand 71 states. [2021-01-06 16:04:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:41,622 INFO L93 Difference]: Finished difference Result 566 states and 566 transitions. [2021-01-06 16:04:41,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-01-06 16:04:41,623 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 546 [2021-01-06 16:04:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:41,625 INFO L225 Difference]: With dead ends: 566 [2021-01-06 16:04:41,625 INFO L226 Difference]: Without dead ends: 562 [2021-01-06 16:04:41,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-01-06 16:04:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-01-06 16:04:41,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 555. [2021-01-06 16:04:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2021-01-06 16:04:41,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 555 transitions. [2021-01-06 16:04:41,632 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 555 transitions. Word has length 546 [2021-01-06 16:04:41,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:41,632 INFO L481 AbstractCegarLoop]: Abstraction has 555 states and 555 transitions. [2021-01-06 16:04:41,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2021-01-06 16:04:41,632 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 555 transitions. [2021-01-06 16:04:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-01-06 16:04:41,635 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:41,635 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:41,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:41,836 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:41,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash -477082676, now seen corresponding path program 68 times [2021-01-06 16:04:41,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:41,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436846583] [2021-01-06 16:04:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 18292 backedges. 0 proven. 18292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:45,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436846583] [2021-01-06 16:04:45,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339420677] [2021-01-06 16:04:45,332 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:45,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:04:45,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 70 conjunts are in the unsatisfiable core [2021-01-06 16:04:45,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 18292 backedges. 0 proven. 18292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:46,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:46,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-01-06 16:04:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102718333] [2021-01-06 16:04:46,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-01-06 16:04:46,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:46,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-01-06 16:04:46,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:04:46,677 INFO L87 Difference]: Start difference. First operand 555 states and 555 transitions. Second operand 72 states. [2021-01-06 16:04:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:47,119 INFO L93 Difference]: Finished difference Result 574 states and 574 transitions. [2021-01-06 16:04:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-01-06 16:04:47,119 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 554 [2021-01-06 16:04:47,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:47,121 INFO L225 Difference]: With dead ends: 574 [2021-01-06 16:04:47,121 INFO L226 Difference]: Without dead ends: 570 [2021-01-06 16:04:47,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-01-06 16:04:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-01-06 16:04:47,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 563. [2021-01-06 16:04:47,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2021-01-06 16:04:47,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 563 transitions. [2021-01-06 16:04:47,129 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 563 transitions. Word has length 554 [2021-01-06 16:04:47,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:47,129 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 563 transitions. [2021-01-06 16:04:47,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2021-01-06 16:04:47,129 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 563 transitions. [2021-01-06 16:04:47,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2021-01-06 16:04:47,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:47,132 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:47,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-01-06 16:04:47,333 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:47,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:47,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1661845705, now seen corresponding path program 69 times [2021-01-06 16:04:47,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:47,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969851372] [2021-01-06 16:04:47,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 18837 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969851372] [2021-01-06 16:04:50,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697223420] [2021-01-06 16:04:50,942 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:51,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-01-06 16:04:51,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:51,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 71 conjunts are in the unsatisfiable core [2021-01-06 16:04:51,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18837 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:52,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:52,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-01-06 16:04:52,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259032592] [2021-01-06 16:04:52,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-01-06 16:04:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-01-06 16:04:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:04:52,597 INFO L87 Difference]: Start difference. First operand 563 states and 563 transitions. Second operand 73 states. [2021-01-06 16:04:53,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:53,056 INFO L93 Difference]: Finished difference Result 582 states and 582 transitions. [2021-01-06 16:04:53,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-01-06 16:04:53,057 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 562 [2021-01-06 16:04:53,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:53,059 INFO L225 Difference]: With dead ends: 582 [2021-01-06 16:04:53,059 INFO L226 Difference]: Without dead ends: 578 [2021-01-06 16:04:53,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-01-06 16:04:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-01-06 16:04:53,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 571. [2021-01-06 16:04:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-01-06 16:04:53,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 571 transitions. [2021-01-06 16:04:53,066 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 571 transitions. Word has length 562 [2021-01-06 16:04:53,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:53,066 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 571 transitions. [2021-01-06 16:04:53,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2021-01-06 16:04:53,066 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 571 transitions. [2021-01-06 16:04:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2021-01-06 16:04:53,069 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:53,069 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:53,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 16:04:53,270 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:53,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:53,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1397462946, now seen corresponding path program 70 times [2021-01-06 16:04:53,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:53,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39628670] [2021-01-06 16:04:53,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:04:56,985 INFO L134 CoverageAnalysis]: Checked inductivity of 19390 backedges. 0 proven. 19390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:56,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39628670] [2021-01-06 16:04:56,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558082253] [2021-01-06 16:04:56,985 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:04:57,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:04:57,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:04:57,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 2375 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:04:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:04:58,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19390 backedges. 0 proven. 19390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:04:58,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:04:58,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-01-06 16:04:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217045183] [2021-01-06 16:04:58,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-01-06 16:04:58,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:04:58,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-01-06 16:04:58,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:04:58,412 INFO L87 Difference]: Start difference. First operand 571 states and 571 transitions. Second operand 74 states. [2021-01-06 16:04:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:04:58,869 INFO L93 Difference]: Finished difference Result 590 states and 590 transitions. [2021-01-06 16:04:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-01-06 16:04:58,869 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 570 [2021-01-06 16:04:58,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:04:58,871 INFO L225 Difference]: With dead ends: 590 [2021-01-06 16:04:58,871 INFO L226 Difference]: Without dead ends: 586 [2021-01-06 16:04:58,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-01-06 16:04:58,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-01-06 16:04:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 579. [2021-01-06 16:04:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2021-01-06 16:04:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 579 transitions. [2021-01-06 16:04:58,879 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 579 transitions. Word has length 570 [2021-01-06 16:04:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:04:58,879 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 579 transitions. [2021-01-06 16:04:58,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2021-01-06 16:04:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 579 transitions. [2021-01-06 16:04:58,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-01-06 16:04:58,881 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:04:58,882 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:04:59,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-06 16:04:59,083 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:04:59,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:04:59,084 INFO L82 PathProgramCache]: Analyzing trace with hash 526865677, now seen corresponding path program 71 times [2021-01-06 16:04:59,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:04:59,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056717121] [2021-01-06 16:04:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:04:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:02,964 INFO L134 CoverageAnalysis]: Checked inductivity of 19951 backedges. 0 proven. 19951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:02,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056717121] [2021-01-06 16:05:02,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11783188] [2021-01-06 16:05:02,965 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:03,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-01-06 16:05:03,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:03,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 73 conjunts are in the unsatisfiable core [2021-01-06 16:05:03,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 19951 backedges. 0 proven. 19951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:04,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:04,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-01-06 16:05:04,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122112663] [2021-01-06 16:05:04,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-01-06 16:05:04,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:04,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-01-06 16:05:04,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:05:04,713 INFO L87 Difference]: Start difference. First operand 579 states and 579 transitions. Second operand 75 states. [2021-01-06 16:05:05,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:05,252 INFO L93 Difference]: Finished difference Result 598 states and 598 transitions. [2021-01-06 16:05:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-01-06 16:05:05,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 578 [2021-01-06 16:05:05,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:05,255 INFO L225 Difference]: With dead ends: 598 [2021-01-06 16:05:05,255 INFO L226 Difference]: Without dead ends: 594 [2021-01-06 16:05:05,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-01-06 16:05:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-01-06 16:05:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 587. [2021-01-06 16:05:05,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2021-01-06 16:05:05,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 587 transitions. [2021-01-06 16:05:05,263 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 587 transitions. Word has length 578 [2021-01-06 16:05:05,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:05,264 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 587 transitions. [2021-01-06 16:05:05,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2021-01-06 16:05:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 587 transitions. [2021-01-06 16:05:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-01-06 16:05:05,266 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:05,267 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:05,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:05,467 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:05,468 INFO L82 PathProgramCache]: Analyzing trace with hash 521172856, now seen corresponding path program 72 times [2021-01-06 16:05:05,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:05,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241886027] [2021-01-06 16:05:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20520 backedges. 0 proven. 20520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:09,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241886027] [2021-01-06 16:05:09,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963492973] [2021-01-06 16:05:09,495 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:10,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-01-06 16:05:10,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:10,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 74 conjunts are in the unsatisfiable core [2021-01-06 16:05:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20520 backedges. 0 proven. 20520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:11,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:11,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-01-06 16:05:11,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619215296] [2021-01-06 16:05:11,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-01-06 16:05:11,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:11,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-01-06 16:05:11,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:05:11,273 INFO L87 Difference]: Start difference. First operand 587 states and 587 transitions. Second operand 76 states. [2021-01-06 16:05:11,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:11,772 INFO L93 Difference]: Finished difference Result 606 states and 606 transitions. [2021-01-06 16:05:11,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-01-06 16:05:11,773 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 586 [2021-01-06 16:05:11,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:11,775 INFO L225 Difference]: With dead ends: 606 [2021-01-06 16:05:11,775 INFO L226 Difference]: Without dead ends: 602 [2021-01-06 16:05:11,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:05:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-01-06 16:05:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 595. [2021-01-06 16:05:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2021-01-06 16:05:11,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 595 transitions. [2021-01-06 16:05:11,786 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 595 transitions. Word has length 586 [2021-01-06 16:05:11,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:11,786 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 595 transitions. [2021-01-06 16:05:11,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2021-01-06 16:05:11,787 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 595 transitions. [2021-01-06 16:05:11,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-01-06 16:05:11,790 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:11,791 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:11,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:11,992 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:11,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:11,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1964113635, now seen corresponding path program 73 times [2021-01-06 16:05:11,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:11,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114183744] [2021-01-06 16:05:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 21097 backedges. 0 proven. 21097 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:16,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114183744] [2021-01-06 16:05:16,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367729089] [2021-01-06 16:05:16,047 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:16,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 16:05:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:17,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21097 backedges. 0 proven. 21097 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:17,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:17,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-01-06 16:05:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859785458] [2021-01-06 16:05:17,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-01-06 16:05:17,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:17,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-01-06 16:05:17,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:05:17,526 INFO L87 Difference]: Start difference. First operand 595 states and 595 transitions. Second operand 77 states. [2021-01-06 16:05:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:17,883 INFO L93 Difference]: Finished difference Result 614 states and 614 transitions. [2021-01-06 16:05:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-01-06 16:05:17,883 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 594 [2021-01-06 16:05:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:17,886 INFO L225 Difference]: With dead ends: 614 [2021-01-06 16:05:17,886 INFO L226 Difference]: Without dead ends: 610 [2021-01-06 16:05:17,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-01-06 16:05:17,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-01-06 16:05:17,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 603. [2021-01-06 16:05:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2021-01-06 16:05:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 603 transitions. [2021-01-06 16:05:17,893 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 603 transitions. Word has length 594 [2021-01-06 16:05:17,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:17,894 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 603 transitions. [2021-01-06 16:05:17,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2021-01-06 16:05:17,894 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 603 transitions. [2021-01-06 16:05:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2021-01-06 16:05:17,896 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:17,897 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:18,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:18,098 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:18,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1228335950, now seen corresponding path program 74 times [2021-01-06 16:05:18,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:18,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155543314] [2021-01-06 16:05:18,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 21682 backedges. 0 proven. 21682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155543314] [2021-01-06 16:05:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100143245] [2021-01-06 16:05:22,310 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:22,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:05:22,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:22,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 76 conjunts are in the unsatisfiable core [2021-01-06 16:05:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 21682 backedges. 0 proven. 21682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:23,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:23,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-01-06 16:05:23,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051048074] [2021-01-06 16:05:23,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-01-06 16:05:23,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:23,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-01-06 16:05:23,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:05:23,772 INFO L87 Difference]: Start difference. First operand 603 states and 603 transitions. Second operand 78 states. [2021-01-06 16:05:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:24,188 INFO L93 Difference]: Finished difference Result 622 states and 622 transitions. [2021-01-06 16:05:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-01-06 16:05:24,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 602 [2021-01-06 16:05:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:24,192 INFO L225 Difference]: With dead ends: 622 [2021-01-06 16:05:24,192 INFO L226 Difference]: Without dead ends: 618 [2021-01-06 16:05:24,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-01-06 16:05:24,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-01-06 16:05:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 611. [2021-01-06 16:05:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2021-01-06 16:05:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 611 transitions. [2021-01-06 16:05:24,200 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 611 transitions. Word has length 602 [2021-01-06 16:05:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:24,200 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 611 transitions. [2021-01-06 16:05:24,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2021-01-06 16:05:24,200 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 611 transitions. [2021-01-06 16:05:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2021-01-06 16:05:24,203 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:24,203 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:24,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-01-06 16:05:24,404 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:24,405 INFO L82 PathProgramCache]: Analyzing trace with hash -934658887, now seen corresponding path program 75 times [2021-01-06 16:05:24,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:24,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319464310] [2021-01-06 16:05:24,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22275 backedges. 0 proven. 22275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319464310] [2021-01-06 16:05:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744662584] [2021-01-06 16:05:28,704 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:29,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-01-06 16:05:29,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:29,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 2540 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 16:05:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 22275 backedges. 0 proven. 22275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:30,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:30,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-01-06 16:05:30,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106670772] [2021-01-06 16:05:30,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-01-06 16:05:30,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:30,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-01-06 16:05:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:05:30,568 INFO L87 Difference]: Start difference. First operand 611 states and 611 transitions. Second operand 79 states. [2021-01-06 16:05:30,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:30,979 INFO L93 Difference]: Finished difference Result 630 states and 630 transitions. [2021-01-06 16:05:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-01-06 16:05:30,980 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 610 [2021-01-06 16:05:30,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:30,982 INFO L225 Difference]: With dead ends: 630 [2021-01-06 16:05:30,983 INFO L226 Difference]: Without dead ends: 626 [2021-01-06 16:05:30,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-01-06 16:05:30,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-01-06 16:05:30,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 619. [2021-01-06 16:05:30,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2021-01-06 16:05:30,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 619 transitions. [2021-01-06 16:05:30,990 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 619 transitions. Word has length 610 [2021-01-06 16:05:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:30,991 INFO L481 AbstractCegarLoop]: Abstraction has 619 states and 619 transitions. [2021-01-06 16:05:30,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2021-01-06 16:05:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 619 transitions. [2021-01-06 16:05:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2021-01-06 16:05:30,993 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:30,994 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:31,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:31,195 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:31,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:31,196 INFO L82 PathProgramCache]: Analyzing trace with hash 605483812, now seen corresponding path program 76 times [2021-01-06 16:05:31,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:31,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281558133] [2021-01-06 16:05:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 22876 backedges. 0 proven. 22876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281558133] [2021-01-06 16:05:35,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199008244] [2021-01-06 16:05:35,617 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:36,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:05:36,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:36,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:05:36,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 22876 backedges. 0 proven. 22876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:37,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:37,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-01-06 16:05:37,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262472984] [2021-01-06 16:05:37,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-01-06 16:05:37,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:37,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-01-06 16:05:37,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:05:37,198 INFO L87 Difference]: Start difference. First operand 619 states and 619 transitions. Second operand 80 states. [2021-01-06 16:05:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:37,633 INFO L93 Difference]: Finished difference Result 638 states and 638 transitions. [2021-01-06 16:05:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-01-06 16:05:37,634 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 618 [2021-01-06 16:05:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:37,636 INFO L225 Difference]: With dead ends: 638 [2021-01-06 16:05:37,636 INFO L226 Difference]: Without dead ends: 634 [2021-01-06 16:05:37,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-01-06 16:05:37,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-01-06 16:05:37,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 627. [2021-01-06 16:05:37,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2021-01-06 16:05:37,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 627 transitions. [2021-01-06 16:05:37,644 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 627 transitions. Word has length 618 [2021-01-06 16:05:37,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:37,644 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 627 transitions. [2021-01-06 16:05:37,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2021-01-06 16:05:37,645 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 627 transitions. [2021-01-06 16:05:37,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2021-01-06 16:05:37,647 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:37,648 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:37,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:37,849 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1821897073, now seen corresponding path program 77 times [2021-01-06 16:05:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:37,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464532618] [2021-01-06 16:05:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 23485 backedges. 0 proven. 23485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464532618] [2021-01-06 16:05:42,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109855479] [2021-01-06 16:05:42,382 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:43,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-01-06 16:05:43,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:43,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 2606 conjuncts, 79 conjunts are in the unsatisfiable core [2021-01-06 16:05:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 23485 backedges. 0 proven. 23485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:44,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:44,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-01-06 16:05:44,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629789335] [2021-01-06 16:05:44,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-01-06 16:05:44,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:44,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-01-06 16:05:44,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:05:44,283 INFO L87 Difference]: Start difference. First operand 627 states and 627 transitions. Second operand 81 states. [2021-01-06 16:05:44,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:44,676 INFO L93 Difference]: Finished difference Result 646 states and 646 transitions. [2021-01-06 16:05:44,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-01-06 16:05:44,676 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 626 [2021-01-06 16:05:44,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:44,679 INFO L225 Difference]: With dead ends: 646 [2021-01-06 16:05:44,679 INFO L226 Difference]: Without dead ends: 642 [2021-01-06 16:05:44,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 626 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-01-06 16:05:44,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-01-06 16:05:44,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 635. [2021-01-06 16:05:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2021-01-06 16:05:44,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 635 transitions. [2021-01-06 16:05:44,687 INFO L78 Accepts]: Start accepts. Automaton has 635 states and 635 transitions. Word has length 626 [2021-01-06 16:05:44,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:44,687 INFO L481 AbstractCegarLoop]: Abstraction has 635 states and 635 transitions. [2021-01-06 16:05:44,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2021-01-06 16:05:44,687 INFO L276 IsEmpty]: Start isEmpty. Operand 635 states and 635 transitions. [2021-01-06 16:05:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-01-06 16:05:44,690 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:44,690 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:44,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 16:05:44,891 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:44,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:44,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1376292602, now seen corresponding path program 78 times [2021-01-06 16:05:44,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:44,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851393790] [2021-01-06 16:05:44,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 24102 backedges. 0 proven. 24102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:49,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851393790] [2021-01-06 16:05:49,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440240879] [2021-01-06 16:05:49,550 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:50,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-01-06 16:05:50,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:05:50,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2639 conjuncts, 80 conjunts are in the unsatisfiable core [2021-01-06 16:05:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 24102 backedges. 0 proven. 24102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:51,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:51,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-01-06 16:05:51,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058960551] [2021-01-06 16:05:51,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-01-06 16:05:51,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:51,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-01-06 16:05:51,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:05:51,537 INFO L87 Difference]: Start difference. First operand 635 states and 635 transitions. Second operand 82 states. [2021-01-06 16:05:52,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:52,130 INFO L93 Difference]: Finished difference Result 654 states and 654 transitions. [2021-01-06 16:05:52,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-01-06 16:05:52,130 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 634 [2021-01-06 16:05:52,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:52,133 INFO L225 Difference]: With dead ends: 654 [2021-01-06 16:05:52,133 INFO L226 Difference]: Without dead ends: 650 [2021-01-06 16:05:52,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 714 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-01-06 16:05:52,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-01-06 16:05:52,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 643. [2021-01-06 16:05:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2021-01-06 16:05:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 643 transitions. [2021-01-06 16:05:52,141 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 643 transitions. Word has length 634 [2021-01-06 16:05:52,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:52,141 INFO L481 AbstractCegarLoop]: Abstraction has 643 states and 643 transitions. [2021-01-06 16:05:52,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2021-01-06 16:05:52,141 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 643 transitions. [2021-01-06 16:05:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2021-01-06 16:05:52,144 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:52,144 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:52,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-01-06 16:05:52,345 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:52,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1597803419, now seen corresponding path program 79 times [2021-01-06 16:05:52,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:52,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955835583] [2021-01-06 16:05:52,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24727 backedges. 0 proven. 24727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:57,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955835583] [2021-01-06 16:05:57,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525009326] [2021-01-06 16:05:57,147 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:05:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 2672 conjuncts, 81 conjunts are in the unsatisfiable core [2021-01-06 16:05:57,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:05:58,761 INFO L134 CoverageAnalysis]: Checked inductivity of 24727 backedges. 0 proven. 24727 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:05:58,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:05:58,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-01-06 16:05:58,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830460299] [2021-01-06 16:05:58,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-01-06 16:05:58,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:05:58,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-01-06 16:05:58,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:05:58,764 INFO L87 Difference]: Start difference. First operand 643 states and 643 transitions. Second operand 83 states. [2021-01-06 16:05:59,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:05:59,387 INFO L93 Difference]: Finished difference Result 662 states and 662 transitions. [2021-01-06 16:05:59,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-01-06 16:05:59,388 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 642 [2021-01-06 16:05:59,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:05:59,390 INFO L225 Difference]: With dead ends: 662 [2021-01-06 16:05:59,390 INFO L226 Difference]: Without dead ends: 658 [2021-01-06 16:05:59,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 723 GetRequests, 642 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-01-06 16:05:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-01-06 16:05:59,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 651. [2021-01-06 16:05:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 651 states. [2021-01-06 16:05:59,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 651 transitions. [2021-01-06 16:05:59,399 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 651 transitions. Word has length 642 [2021-01-06 16:05:59,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:05:59,400 INFO L481 AbstractCegarLoop]: Abstraction has 651 states and 651 transitions. [2021-01-06 16:05:59,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2021-01-06 16:05:59,400 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 651 transitions. [2021-01-06 16:05:59,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2021-01-06 16:05:59,403 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:05:59,403 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:05:59,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:05:59,604 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:05:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:05:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash -983318832, now seen corresponding path program 80 times [2021-01-06 16:05:59,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:05:59,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110064194] [2021-01-06 16:05:59,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:05:59,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat