/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/locks/test_locks_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 11:36:35,327 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 11:36:35,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 11:36:35,370 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 11:36:35,371 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 11:36:35,372 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 11:36:35,374 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 11:36:35,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 11:36:35,397 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 11:36:35,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 11:36:35,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 11:36:35,403 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 11:36:35,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 11:36:35,404 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 11:36:35,406 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 11:36:35,407 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 11:36:35,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 11:36:35,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 11:36:35,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 11:36:35,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 11:36:35,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 11:36:35,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 11:36:35,420 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 11:36:35,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 11:36:35,424 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 11:36:35,434 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 11:36:35,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 11:36:35,436 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 11:36:35,438 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 11:36:35,464 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 11:36:35,464 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 11:36:35,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 11:36:35,466 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 11:36:35,467 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 11:36:35,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 11:36:35,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 11:36:35,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 11:36:35,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 11:36:35,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 11:36:35,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 11:36:35,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 11:36:35,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 11:36:35,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 11:36:35,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 11:36:35,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 11:36:35,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 11:36:35,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:36:35,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 11:36:35,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 11:36:35,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 11:36:35,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 11:36:35,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 11:36:35,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 11:36:35,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 11:36:35,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 11:36:35,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 11:36:35,881 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 11:36:35,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 11:36:35,886 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 11:36:35,889 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 11:36:35,890 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_7.c [2021-01-06 11:36:35,973 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/11a8dcc3c/964d738fa3bb4ad6a7a0f6523694959f/FLAG1ba5464bc [2021-01-06 11:36:36,623 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 11:36:36,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/locks/test_locks_7.c [2021-01-06 11:36:36,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/11a8dcc3c/964d738fa3bb4ad6a7a0f6523694959f/FLAG1ba5464bc [2021-01-06 11:36:36,998 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/11a8dcc3c/964d738fa3bb4ad6a7a0f6523694959f [2021-01-06 11:36:37,001 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 11:36:37,003 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 11:36:37,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 11:36:37,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 11:36:37,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 11:36:37,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:36:36" (1/1) ... [2021-01-06 11:36:37,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a597092 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37, skipping insertion in model container [2021-01-06 11:36:37,014 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 11:36:36" (1/1) ... [2021-01-06 11:36:37,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 11:36:37,041 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~cond~0,] left hand side expression in assignment: lhs: VariableLHS[~lk1~0,] left hand side expression in assignment: lhs: VariableLHS[~lk2~0,] left hand side expression in assignment: lhs: VariableLHS[~lk3~0,] left hand side expression in assignment: lhs: VariableLHS[~lk4~0,] left hand side expression in assignment: lhs: VariableLHS[~lk5~0,] left hand side expression in assignment: lhs: VariableLHS[~lk6~0,] left hand side expression in assignment: lhs: VariableLHS[~lk7~0,] left hand side expression in assignment: lhs: VariableLHS[~lk1~0,] left hand side expression in assignment: lhs: VariableLHS[~lk2~0,] left hand side expression in assignment: lhs: VariableLHS[~lk3~0,] left hand side expression in assignment: lhs: VariableLHS[~lk4~0,] left hand side expression in assignment: lhs: VariableLHS[~lk5~0,] left hand side expression in assignment: lhs: VariableLHS[~lk6~0,] left hand side expression in assignment: lhs: VariableLHS[~lk7~0,] left hand side expression in assignment: lhs: VariableLHS[~lk1~0,] left hand side expression in assignment: lhs: VariableLHS[~lk2~0,] left hand side expression in assignment: lhs: VariableLHS[~lk3~0,] left hand side expression in assignment: lhs: VariableLHS[~lk4~0,] left hand side expression in assignment: lhs: VariableLHS[~lk5~0,] left hand side expression in assignment: lhs: VariableLHS[~lk6~0,] left hand side expression in assignment: lhs: VariableLHS[~lk7~0,] [2021-01-06 11:36:37,241 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/locks/test_locks_7.c[2881,2894] [2021-01-06 11:36:37,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:36:37,257 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~cond~0,] left hand side expression in assignment: lhs: VariableLHS[~lk1~0,] left hand side expression in assignment: lhs: VariableLHS[~lk2~0,] left hand side expression in assignment: lhs: VariableLHS[~lk3~0,] left hand side expression in assignment: lhs: VariableLHS[~lk4~0,] left hand side expression in assignment: lhs: VariableLHS[~lk5~0,] left hand side expression in assignment: lhs: VariableLHS[~lk6~0,] left hand side expression in assignment: lhs: VariableLHS[~lk7~0,] left hand side expression in assignment: lhs: VariableLHS[~lk1~0,] left hand side expression in assignment: lhs: VariableLHS[~lk2~0,] left hand side expression in assignment: lhs: VariableLHS[~lk3~0,] left hand side expression in assignment: lhs: VariableLHS[~lk4~0,] left hand side expression in assignment: lhs: VariableLHS[~lk5~0,] left hand side expression in assignment: lhs: VariableLHS[~lk6~0,] left hand side expression in assignment: lhs: VariableLHS[~lk7~0,] left hand side expression in assignment: lhs: VariableLHS[~lk1~0,] left hand side expression in assignment: lhs: VariableLHS[~lk2~0,] left hand side expression in assignment: lhs: VariableLHS[~lk3~0,] left hand side expression in assignment: lhs: VariableLHS[~lk4~0,] left hand side expression in assignment: lhs: VariableLHS[~lk5~0,] left hand side expression in assignment: lhs: VariableLHS[~lk6~0,] left hand side expression in assignment: lhs: VariableLHS[~lk7~0,] [2021-01-06 11:36:37,285 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/locks/test_locks_7.c[2881,2894] [2021-01-06 11:36:37,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 11:36:37,302 INFO L208 MainTranslator]: Completed translation [2021-01-06 11:36:37,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37 WrapperNode [2021-01-06 11:36:37,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 11:36:37,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 11:36:37,304 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 11:36:37,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 11:36:37,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 11:36:37,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 11:36:37,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 11:36:37,346 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 11:36:37,355 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,356 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,358 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,362 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,367 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... [2021-01-06 11:36:37,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 11:36:37,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 11:36:37,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 11:36:37,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 11:36:37,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 11:36:37,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 11:36:37,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 11:36:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 11:36:37,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 11:36:37,924 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 11:36:37,925 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-01-06 11:36:37,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:36:37 BoogieIcfgContainer [2021-01-06 11:36:37,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 11:36:37,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 11:36:37,929 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 11:36:37,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 11:36:37,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 11:36:36" (1/3) ... [2021-01-06 11:36:37,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f98772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:36:37, skipping insertion in model container [2021-01-06 11:36:37,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 11:36:37" (2/3) ... [2021-01-06 11:36:37,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f98772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 11:36:37, skipping insertion in model container [2021-01-06 11:36:37,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:36:37" (3/3) ... [2021-01-06 11:36:37,937 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_7.c [2021-01-06 11:36:37,945 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 11:36:37,951 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 11:36:37,972 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 11:36:38,002 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 11:36:38,003 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 11:36:38,003 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 11:36:38,003 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 11:36:38,003 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 11:36:38,003 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 11:36:38,004 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 11:36:38,004 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 11:36:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2021-01-06 11:36:38,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:36:38,027 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:38,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:38,028 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:38,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash -882170869, now seen corresponding path program 1 times [2021-01-06 11:36:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:38,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336597338] [2021-01-06 11:36:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:38,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336597338] [2021-01-06 11:36:38,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:38,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:38,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657932751] [2021-01-06 11:36:38,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:38,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:38,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:38,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,283 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2021-01-06 11:36:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:38,333 INFO L93 Difference]: Finished difference Result 65 states and 109 transitions. [2021-01-06 11:36:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:38,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 11:36:38,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:38,348 INFO L225 Difference]: With dead ends: 65 [2021-01-06 11:36:38,348 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 11:36:38,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 11:36:38,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 35. [2021-01-06 11:36:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 11:36:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 62 transitions. [2021-01-06 11:36:38,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 62 transitions. Word has length 14 [2021-01-06 11:36:38,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:38,399 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 62 transitions. [2021-01-06 11:36:38,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 62 transitions. [2021-01-06 11:36:38,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 11:36:38,401 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:38,401 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:38,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 11:36:38,402 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:38,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:38,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1275197879, now seen corresponding path program 1 times [2021-01-06 11:36:38,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:38,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801405703] [2021-01-06 11:36:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:38,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801405703] [2021-01-06 11:36:38,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:38,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:38,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808455002] [2021-01-06 11:36:38,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:38,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:38,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:38,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,463 INFO L87 Difference]: Start difference. First operand 35 states and 62 transitions. Second operand 3 states. [2021-01-06 11:36:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:38,497 INFO L93 Difference]: Finished difference Result 84 states and 149 transitions. [2021-01-06 11:36:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:38,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2021-01-06 11:36:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:38,500 INFO L225 Difference]: With dead ends: 84 [2021-01-06 11:36:38,500 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 11:36:38,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 11:36:38,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-01-06 11:36:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 11:36:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 86 transitions. [2021-01-06 11:36:38,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 86 transitions. Word has length 14 [2021-01-06 11:36:38,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:38,511 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 86 transitions. [2021-01-06 11:36:38,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:38,511 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 86 transitions. [2021-01-06 11:36:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:36:38,512 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:38,513 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:38,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 11:36:38,513 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:38,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:38,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1577278843, now seen corresponding path program 1 times [2021-01-06 11:36:38,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:38,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840773049] [2021-01-06 11:36:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:38,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840773049] [2021-01-06 11:36:38,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:38,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:38,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751400454] [2021-01-06 11:36:38,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:38,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,614 INFO L87 Difference]: Start difference. First operand 49 states and 86 transitions. Second operand 3 states. [2021-01-06 11:36:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:38,670 INFO L93 Difference]: Finished difference Result 78 states and 132 transitions. [2021-01-06 11:36:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:38,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 11:36:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:38,673 INFO L225 Difference]: With dead ends: 78 [2021-01-06 11:36:38,673 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 11:36:38,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 11:36:38,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-01-06 11:36:38,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 11:36:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 88 transitions. [2021-01-06 11:36:38,684 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 88 transitions. Word has length 15 [2021-01-06 11:36:38,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:38,685 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 88 transitions. [2021-01-06 11:36:38,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 88 transitions. [2021-01-06 11:36:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:36:38,686 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:38,686 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:38,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 11:36:38,687 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:38,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:38,687 INFO L82 PathProgramCache]: Analyzing trace with hash -876214265, now seen corresponding path program 1 times [2021-01-06 11:36:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:38,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917364471] [2021-01-06 11:36:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:38,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917364471] [2021-01-06 11:36:38,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:38,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:38,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852928304] [2021-01-06 11:36:38,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:38,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:38,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:38,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,736 INFO L87 Difference]: Start difference. First operand 52 states and 88 transitions. Second operand 3 states. [2021-01-06 11:36:38,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:38,761 INFO L93 Difference]: Finished difference Result 97 states and 165 transitions. [2021-01-06 11:36:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:38,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 11:36:38,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:38,764 INFO L225 Difference]: With dead ends: 97 [2021-01-06 11:36:38,764 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 11:36:38,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 11:36:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2021-01-06 11:36:38,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 11:36:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 117 transitions. [2021-01-06 11:36:38,776 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 117 transitions. Word has length 15 [2021-01-06 11:36:38,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:38,776 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 117 transitions. [2021-01-06 11:36:38,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 117 transitions. [2021-01-06 11:36:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 11:36:38,777 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:38,778 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:38,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 11:36:38,778 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:38,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1269241275, now seen corresponding path program 1 times [2021-01-06 11:36:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:38,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897679677] [2021-01-06 11:36:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:38,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897679677] [2021-01-06 11:36:38,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:38,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392796064] [2021-01-06 11:36:38,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:38,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:38,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,832 INFO L87 Difference]: Start difference. First operand 69 states and 117 transitions. Second operand 3 states. [2021-01-06 11:36:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:38,874 INFO L93 Difference]: Finished difference Result 161 states and 275 transitions. [2021-01-06 11:36:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:38,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2021-01-06 11:36:38,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:38,884 INFO L225 Difference]: With dead ends: 161 [2021-01-06 11:36:38,884 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 11:36:38,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 11:36:38,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-01-06 11:36:38,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 11:36:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 159 transitions. [2021-01-06 11:36:38,915 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 159 transitions. Word has length 15 [2021-01-06 11:36:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:38,915 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 159 transitions. [2021-01-06 11:36:38,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:38,916 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 159 transitions. [2021-01-06 11:36:38,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:36:38,917 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:38,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:38,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 11:36:38,918 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1392623778, now seen corresponding path program 1 times [2021-01-06 11:36:38,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:38,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97561595] [2021-01-06 11:36:38,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:38,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:38,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97561595] [2021-01-06 11:36:38,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:38,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:38,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150936940] [2021-01-06 11:36:38,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:38,990 INFO L87 Difference]: Start difference. First operand 95 states and 159 transitions. Second operand 3 states. [2021-01-06 11:36:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,015 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2021-01-06 11:36:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 11:36:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,017 INFO L225 Difference]: With dead ends: 144 [2021-01-06 11:36:39,017 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 11:36:39,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 11:36:39,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2021-01-06 11:36:39,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2021-01-06 11:36:39,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2021-01-06 11:36:39,027 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 16 [2021-01-06 11:36:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,028 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2021-01-06 11:36:39,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2021-01-06 11:36:39,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:36:39,030 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,030 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:39,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 11:36:39,030 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash -691559200, now seen corresponding path program 1 times [2021-01-06 11:36:39,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103164260] [2021-01-06 11:36:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103164260] [2021-01-06 11:36:39,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070422461] [2021-01-06 11:36:39,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,074 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand 3 states. [2021-01-06 11:36:39,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,105 INFO L93 Difference]: Finished difference Result 273 states and 449 transitions. [2021-01-06 11:36:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 11:36:39,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,107 INFO L225 Difference]: With dead ends: 273 [2021-01-06 11:36:39,108 INFO L226 Difference]: Without dead ends: 183 [2021-01-06 11:36:39,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-01-06 11:36:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2021-01-06 11:36:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 11:36:39,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 291 transitions. [2021-01-06 11:36:39,123 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 291 transitions. Word has length 16 [2021-01-06 11:36:39,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,123 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 291 transitions. [2021-01-06 11:36:39,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,123 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 291 transitions. [2021-01-06 11:36:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 11:36:39,125 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:39,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-01-06 11:36:39,126 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,126 INFO L82 PathProgramCache]: Analyzing trace with hash -298532190, now seen corresponding path program 1 times [2021-01-06 11:36:39,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040909195] [2021-01-06 11:36:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040909195] [2021-01-06 11:36:39,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892842648] [2021-01-06 11:36:39,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,170 INFO L87 Difference]: Start difference. First operand 181 states and 291 transitions. Second operand 3 states. [2021-01-06 11:36:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,195 INFO L93 Difference]: Finished difference Result 225 states and 365 transitions. [2021-01-06 11:36:39,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2021-01-06 11:36:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,198 INFO L225 Difference]: With dead ends: 225 [2021-01-06 11:36:39,198 INFO L226 Difference]: Without dead ends: 223 [2021-01-06 11:36:39,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-01-06 11:36:39,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 181. [2021-01-06 11:36:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2021-01-06 11:36:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 287 transitions. [2021-01-06 11:36:39,225 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 287 transitions. Word has length 16 [2021-01-06 11:36:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,226 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 287 transitions. [2021-01-06 11:36:39,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 287 transitions. [2021-01-06 11:36:39,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:36:39,230 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,230 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:39,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-01-06 11:36:39,231 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,233 INFO L82 PathProgramCache]: Analyzing trace with hash 36716282, now seen corresponding path program 1 times [2021-01-06 11:36:39,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899359117] [2021-01-06 11:36:39,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899359117] [2021-01-06 11:36:39,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078670142] [2021-01-06 11:36:39,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,271 INFO L87 Difference]: Start difference. First operand 181 states and 287 transitions. Second operand 3 states. [2021-01-06 11:36:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,299 INFO L93 Difference]: Finished difference Result 325 states and 521 transitions. [2021-01-06 11:36:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,300 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 11:36:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,303 INFO L225 Difference]: With dead ends: 325 [2021-01-06 11:36:39,303 INFO L226 Difference]: Without dead ends: 323 [2021-01-06 11:36:39,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-01-06 11:36:39,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 257. [2021-01-06 11:36:39,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2021-01-06 11:36:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 399 transitions. [2021-01-06 11:36:39,328 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 399 transitions. Word has length 17 [2021-01-06 11:36:39,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,329 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 399 transitions. [2021-01-06 11:36:39,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,329 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 399 transitions. [2021-01-06 11:36:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 11:36:39,334 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:39,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-01-06 11:36:39,335 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,336 INFO L82 PathProgramCache]: Analyzing trace with hash -356310728, now seen corresponding path program 1 times [2021-01-06 11:36:39,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120412375] [2021-01-06 11:36:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120412375] [2021-01-06 11:36:39,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682560013] [2021-01-06 11:36:39,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,411 INFO L87 Difference]: Start difference. First operand 257 states and 399 transitions. Second operand 3 states. [2021-01-06 11:36:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,457 INFO L93 Difference]: Finished difference Result 597 states and 929 transitions. [2021-01-06 11:36:39,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,459 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2021-01-06 11:36:39,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,461 INFO L225 Difference]: With dead ends: 597 [2021-01-06 11:36:39,461 INFO L226 Difference]: Without dead ends: 347 [2021-01-06 11:36:39,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-01-06 11:36:39,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 345. [2021-01-06 11:36:39,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 345 states. [2021-01-06 11:36:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 523 transitions. [2021-01-06 11:36:39,482 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 523 transitions. Word has length 17 [2021-01-06 11:36:39,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,483 INFO L481 AbstractCegarLoop]: Abstraction has 345 states and 523 transitions. [2021-01-06 11:36:39,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,483 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 523 transitions. [2021-01-06 11:36:39,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:36:39,485 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,485 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 11:36:39,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-01-06 11:36:39,485 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1138420085, now seen corresponding path program 1 times [2021-01-06 11:36:39,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241912200] [2021-01-06 11:36:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241912200] [2021-01-06 11:36:39,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576769189] [2021-01-06 11:36:39,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,547 INFO L87 Difference]: Start difference. First operand 345 states and 523 transitions. Second operand 3 states. [2021-01-06 11:36:39,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,580 INFO L93 Difference]: Finished difference Result 525 states and 793 transitions. [2021-01-06 11:36:39,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-01-06 11:36:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,584 INFO L225 Difference]: With dead ends: 525 [2021-01-06 11:36:39,584 INFO L226 Difference]: Without dead ends: 359 [2021-01-06 11:36:39,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-01-06 11:36:39,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2021-01-06 11:36:39,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2021-01-06 11:36:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 531 transitions. [2021-01-06 11:36:39,602 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 531 transitions. Word has length 18 [2021-01-06 11:36:39,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,602 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 531 transitions. [2021-01-06 11:36:39,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,603 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 531 transitions. [2021-01-06 11:36:39,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:36:39,604 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,604 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 11:36:39,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-01-06 11:36:39,604 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1839484663, now seen corresponding path program 1 times [2021-01-06 11:36:39,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947554725] [2021-01-06 11:36:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947554725] [2021-01-06 11:36:39,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783906540] [2021-01-06 11:36:39,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,638 INFO L87 Difference]: Start difference. First operand 357 states and 531 transitions. Second operand 3 states. [2021-01-06 11:36:39,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,671 INFO L93 Difference]: Finished difference Result 617 states and 925 transitions. [2021-01-06 11:36:39,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-01-06 11:36:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,677 INFO L225 Difference]: With dead ends: 617 [2021-01-06 11:36:39,677 INFO L226 Difference]: Without dead ends: 615 [2021-01-06 11:36:39,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-01-06 11:36:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 517. [2021-01-06 11:36:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2021-01-06 11:36:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 747 transitions. [2021-01-06 11:36:39,701 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 747 transitions. Word has length 18 [2021-01-06 11:36:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,702 INFO L481 AbstractCegarLoop]: Abstraction has 517 states and 747 transitions. [2021-01-06 11:36:39,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 747 transitions. [2021-01-06 11:36:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 11:36:39,704 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,704 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 11:36:39,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-01-06 11:36:39,705 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1446457653, now seen corresponding path program 1 times [2021-01-06 11:36:39,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961080162] [2021-01-06 11:36:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961080162] [2021-01-06 11:36:39,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892252917] [2021-01-06 11:36:39,737 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,738 INFO L87 Difference]: Start difference. First operand 517 states and 747 transitions. Second operand 3 states. [2021-01-06 11:36:39,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,776 INFO L93 Difference]: Finished difference Result 1177 states and 1693 transitions. [2021-01-06 11:36:39,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2021-01-06 11:36:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,781 INFO L225 Difference]: With dead ends: 1177 [2021-01-06 11:36:39,782 INFO L226 Difference]: Without dead ends: 679 [2021-01-06 11:36:39,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-01-06 11:36:39,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 677. [2021-01-06 11:36:39,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 677 states. [2021-01-06 11:36:39,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 947 transitions. [2021-01-06 11:36:39,812 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 947 transitions. Word has length 18 [2021-01-06 11:36:39,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,812 INFO L481 AbstractCegarLoop]: Abstraction has 677 states and 947 transitions. [2021-01-06 11:36:39,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,813 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 947 transitions. [2021-01-06 11:36:39,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:36:39,814 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,814 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:39,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-01-06 11:36:39,815 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1189665389, now seen corresponding path program 1 times [2021-01-06 11:36:39,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329476179] [2021-01-06 11:36:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329476179] [2021-01-06 11:36:39,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635081972] [2021-01-06 11:36:39,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,849 INFO L87 Difference]: Start difference. First operand 677 states and 947 transitions. Second operand 3 states. [2021-01-06 11:36:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,883 INFO L93 Difference]: Finished difference Result 1017 states and 1413 transitions. [2021-01-06 11:36:39,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,884 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 11:36:39,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,888 INFO L225 Difference]: With dead ends: 1017 [2021-01-06 11:36:39,888 INFO L226 Difference]: Without dead ends: 695 [2021-01-06 11:36:39,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-01-06 11:36:39,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 693. [2021-01-06 11:36:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 693 states. [2021-01-06 11:36:39,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 947 transitions. [2021-01-06 11:36:39,916 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 947 transitions. Word has length 19 [2021-01-06 11:36:39,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:39,917 INFO L481 AbstractCegarLoop]: Abstraction has 693 states and 947 transitions. [2021-01-06 11:36:39,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:39,917 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 947 transitions. [2021-01-06 11:36:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:36:39,918 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:39,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:39,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-01-06 11:36:39,919 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:39,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:39,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1890729967, now seen corresponding path program 1 times [2021-01-06 11:36:39,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:39,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430212948] [2021-01-06 11:36:39,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:39,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:39,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:39,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430212948] [2021-01-06 11:36:39,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:39,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:39,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902662368] [2021-01-06 11:36:39,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:39,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:39,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:39,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,948 INFO L87 Difference]: Start difference. First operand 693 states and 947 transitions. Second operand 3 states. [2021-01-06 11:36:39,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:39,984 INFO L93 Difference]: Finished difference Result 1161 states and 1589 transitions. [2021-01-06 11:36:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:39,984 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 11:36:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:39,991 INFO L225 Difference]: With dead ends: 1161 [2021-01-06 11:36:39,991 INFO L226 Difference]: Without dead ends: 1159 [2021-01-06 11:36:39,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-01-06 11:36:40,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 1029. [2021-01-06 11:36:40,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2021-01-06 11:36:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1363 transitions. [2021-01-06 11:36:40,031 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1363 transitions. Word has length 19 [2021-01-06 11:36:40,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:40,032 INFO L481 AbstractCegarLoop]: Abstraction has 1029 states and 1363 transitions. [2021-01-06 11:36:40,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1363 transitions. [2021-01-06 11:36:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 11:36:40,034 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:40,034 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:40,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-01-06 11:36:40,035 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:40,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1497702957, now seen corresponding path program 1 times [2021-01-06 11:36:40,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:40,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160055413] [2021-01-06 11:36:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:40,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:40,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160055413] [2021-01-06 11:36:40,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:40,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:40,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939286587] [2021-01-06 11:36:40,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:40,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:40,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:40,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,062 INFO L87 Difference]: Start difference. First operand 1029 states and 1363 transitions. Second operand 3 states. [2021-01-06 11:36:40,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:40,114 INFO L93 Difference]: Finished difference Result 2313 states and 3029 transitions. [2021-01-06 11:36:40,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:40,115 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2021-01-06 11:36:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:40,121 INFO L225 Difference]: With dead ends: 2313 [2021-01-06 11:36:40,121 INFO L226 Difference]: Without dead ends: 1319 [2021-01-06 11:36:40,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2021-01-06 11:36:40,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1317. [2021-01-06 11:36:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1317 states. [2021-01-06 11:36:40,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 1667 transitions. [2021-01-06 11:36:40,175 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 1667 transitions. Word has length 19 [2021-01-06 11:36:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:40,175 INFO L481 AbstractCegarLoop]: Abstraction has 1317 states and 1667 transitions. [2021-01-06 11:36:40,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 1667 transitions. [2021-01-06 11:36:40,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:36:40,178 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:40,178 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:40,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-01-06 11:36:40,179 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:40,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:40,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1516697142, now seen corresponding path program 1 times [2021-01-06 11:36:40,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:40,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624761273] [2021-01-06 11:36:40,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:40,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:40,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624761273] [2021-01-06 11:36:40,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:40,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:40,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393893922] [2021-01-06 11:36:40,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:40,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:40,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:40,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,221 INFO L87 Difference]: Start difference. First operand 1317 states and 1667 transitions. Second operand 3 states. [2021-01-06 11:36:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:40,263 INFO L93 Difference]: Finished difference Result 1977 states and 2485 transitions. [2021-01-06 11:36:40,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:40,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-01-06 11:36:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:40,270 INFO L225 Difference]: With dead ends: 1977 [2021-01-06 11:36:40,271 INFO L226 Difference]: Without dead ends: 1351 [2021-01-06 11:36:40,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2021-01-06 11:36:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1349. [2021-01-06 11:36:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1349 states. [2021-01-06 11:36:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1667 transitions. [2021-01-06 11:36:40,347 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1667 transitions. Word has length 20 [2021-01-06 11:36:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:40,347 INFO L481 AbstractCegarLoop]: Abstraction has 1349 states and 1667 transitions. [2021-01-06 11:36:40,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:40,348 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1667 transitions. [2021-01-06 11:36:40,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:36:40,350 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:40,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:40,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-01-06 11:36:40,350 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:40,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:40,351 INFO L82 PathProgramCache]: Analyzing trace with hash -815632564, now seen corresponding path program 1 times [2021-01-06 11:36:40,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:40,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817431161] [2021-01-06 11:36:40,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:40,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817431161] [2021-01-06 11:36:40,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:40,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:40,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647730852] [2021-01-06 11:36:40,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:40,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:40,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:40,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,376 INFO L87 Difference]: Start difference. First operand 1349 states and 1667 transitions. Second operand 3 states. [2021-01-06 11:36:40,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:40,432 INFO L93 Difference]: Finished difference Result 2183 states and 2660 transitions. [2021-01-06 11:36:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:40,433 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-01-06 11:36:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:40,443 INFO L225 Difference]: With dead ends: 2183 [2021-01-06 11:36:40,443 INFO L226 Difference]: Without dead ends: 2181 [2021-01-06 11:36:40,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2021-01-06 11:36:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2053. [2021-01-06 11:36:40,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2053 states. [2021-01-06 11:36:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 2467 transitions. [2021-01-06 11:36:40,526 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 2467 transitions. Word has length 20 [2021-01-06 11:36:40,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:40,527 INFO L481 AbstractCegarLoop]: Abstraction has 2053 states and 2467 transitions. [2021-01-06 11:36:40,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:40,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 2467 transitions. [2021-01-06 11:36:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 11:36:40,531 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 11:36:40,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 11:36:40,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-01-06 11:36:40,532 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 11:36:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 11:36:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1208659574, now seen corresponding path program 1 times [2021-01-06 11:36:40,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 11:36:40,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039396002] [2021-01-06 11:36:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 11:36:40,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 11:36:40,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 11:36:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039396002] [2021-01-06 11:36:40,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 11:36:40,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 11:36:40,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061117566] [2021-01-06 11:36:40,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 11:36:40,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 11:36:40,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 11:36:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,590 INFO L87 Difference]: Start difference. First operand 2053 states and 2467 transitions. Second operand 3 states. [2021-01-06 11:36:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 11:36:40,679 INFO L93 Difference]: Finished difference Result 4549 states and 5347 transitions. [2021-01-06 11:36:40,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 11:36:40,680 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-01-06 11:36:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 11:36:40,681 INFO L225 Difference]: With dead ends: 4549 [2021-01-06 11:36:40,681 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 11:36:40,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 11:36:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 11:36:40,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 11:36:40,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 11:36:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 11:36:40,689 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-01-06 11:36:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 11:36:40,689 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 11:36:40,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 11:36:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 11:36:40,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 11:36:40,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-01-06 11:36:40,692 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 11:36:40,712 INFO L189 CegarLoopUtils]: For program point L93-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,712 INFO L189 CegarLoopUtils]: For program point L77-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,712 INFO L189 CegarLoopUtils]: For program point L69-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,712 INFO L189 CegarLoopUtils]: For program point L94(line 94) no Hoare annotation was computed. [2021-01-06 11:36:40,712 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 11:36:40,712 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L189 CegarLoopUtils]: For program point L61-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L192 CegarLoopUtils]: At program point L119(lines 7 123) the Hoare annotation is: true [2021-01-06 11:36:40,713 INFO L189 CegarLoopUtils]: For program point L53(lines 53 55) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L189 CegarLoopUtils]: For program point L53-2(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L189 CegarLoopUtils]: For program point L103-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L189 CegarLoopUtils]: For program point L104(line 104) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L189 CegarLoopUtils]: For program point L88-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,713 INFO L192 CegarLoopUtils]: At program point L113-1(lines 32 118) the Hoare annotation is: true [2021-01-06 11:36:40,714 INFO L192 CegarLoopUtils]: At program point L122(lines 6 123) the Hoare annotation is: true [2021-01-06 11:36:40,714 INFO L189 CegarLoopUtils]: For program point L89(line 89) no Hoare annotation was computed. [2021-01-06 11:36:40,714 INFO L189 CegarLoopUtils]: For program point L114(line 114) no Hoare annotation was computed. [2021-01-06 11:36:40,714 INFO L185 CegarLoopUtils]: At program point L114-1(lines 7 123) the Hoare annotation is: false [2021-01-06 11:36:40,714 INFO L189 CegarLoopUtils]: For program point L73-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,715 INFO L189 CegarLoopUtils]: For program point L98-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,715 INFO L189 CegarLoopUtils]: For program point L65-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,715 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 11:36:40,715 INFO L189 CegarLoopUtils]: For program point L57-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 121) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point L99(line 99) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point L83-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point L108-1(lines 32 118) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point L34(lines 34 36) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point L84(line 84) no Hoare annotation was computed. [2021-01-06 11:36:40,716 INFO L189 CegarLoopUtils]: For program point L109(line 109) no Hoare annotation was computed. [2021-01-06 11:36:40,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 11:36:40 BoogieIcfgContainer [2021-01-06 11:36:40,727 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 11:36:40,728 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 11:36:40,728 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 11:36:40,728 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 11:36:40,729 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 11:36:37" (3/4) ... [2021-01-06 11:36:40,732 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 11:36:40,743 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-01-06 11:36:40,744 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 11:36:40,744 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 11:36:40,744 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 11:36:40,798 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/locks/test_locks_7.c-witness.graphml [2021-01-06 11:36:40,798 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 11:36:40,801 INFO L168 Benchmark]: Toolchain (without parser) took 3797.04 ms. Allocated memory was 169.9 MB in the beginning and 228.6 MB in the end (delta: 58.7 MB). Free memory was 144.7 MB in the beginning and 136.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 67.6 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,801 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 169.9 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 11:36:40,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 299.11 ms. Allocated memory is still 169.9 MB. Free memory was 144.5 MB in the beginning and 134.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.36 ms. Allocated memory is still 169.9 MB. Free memory was 134.3 MB in the beginning and 132.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,803 INFO L168 Benchmark]: Boogie Preprocessor took 26.81 ms. Allocated memory is still 169.9 MB. Free memory was 132.8 MB in the beginning and 131.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,803 INFO L168 Benchmark]: RCFGBuilder took 553.98 ms. Allocated memory is still 169.9 MB. Free memory was 131.6 MB in the beginning and 149.0 MB in the end (delta: -17.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,804 INFO L168 Benchmark]: TraceAbstraction took 2798.96 ms. Allocated memory was 169.9 MB in the beginning and 228.6 MB in the end (delta: 58.7 MB). Free memory was 148.5 MB in the beginning and 140.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 67.7 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,805 INFO L168 Benchmark]: Witness Printer took 70.24 ms. Allocated memory is still 228.6 MB. Free memory was 140.0 MB in the beginning and 136.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 11:36:40,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 169.9 MB. Free memory is still 141.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 299.11 ms. Allocated memory is still 169.9 MB. Free memory was 144.5 MB in the beginning and 134.5 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 40.36 ms. Allocated memory is still 169.9 MB. Free memory was 134.3 MB in the beginning and 132.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.81 ms. Allocated memory is still 169.9 MB. Free memory was 132.8 MB in the beginning and 131.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 553.98 ms. Allocated memory is still 169.9 MB. Free memory was 131.6 MB in the beginning and 149.0 MB in the end (delta: -17.4 MB). Peak memory consumption was 17.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2798.96 ms. Allocated memory was 169.9 MB in the beginning and 228.6 MB in the end (delta: 58.7 MB). Free memory was 148.5 MB in the beginning and 140.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 67.7 MB. Max. memory is 8.0 GB. * Witness Printer took 70.24 ms. Allocated memory is still 228.6 MB. Free memory was 140.0 MB in the beginning and 136.3 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 121]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.6s, OverallIterations: 19, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1128 SDtfs, 543 SDslu, 729 SDs, 0 SdLazy, 101 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2053occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 19 MinimizatonAttempts, 528 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 137 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 326 NumberOfCodeBlocks, 326 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 307 ConstructedInterpolants, 0 QuantifiedInterpolants, 10138 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 19 InterpolantComputations, 19 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...