/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_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 01:42:08,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 01:42:08,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 01:42:08,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 01:42:08,356 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 01:42:08,358 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 01:42:08,360 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 01:42:08,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 01:42:08,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 01:42:08,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 01:42:08,375 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 01:42:08,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 01:42:08,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 01:42:08,379 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 01:42:08,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 01:42:08,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 01:42:08,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 01:42:08,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 01:42:08,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 01:42:08,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 01:42:08,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 01:42:08,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 01:42:08,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 01:42:08,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 01:42:08,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 01:42:08,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 01:42:08,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 01:42:08,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 01:42:08,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 01:42:08,449 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 01:42:08,450 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 01:42:08,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 01:42:08,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 01:42:08,452 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 01:42:08,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 01:42:08,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 01:42:08,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 01:42:08,455 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 01:42:08,455 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 01:42:08,455 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 01:42:08,456 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 01:42:08,456 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 01:42:08,456 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 01:42:08,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 01:42:08,457 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 01:42:08,457 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 01:42:08,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 01:42:08,457 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 01:42:08,457 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 01:42:08,458 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 01:42:08,458 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 01:42:08,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 01:42:08,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 01:42:08,461 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 01:42:08,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 01:42:08,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 01:42:08,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 01:42:08,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 01:42:08,927 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 01:42:08,928 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 01:42:08,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/locks/test_locks_10.c [2020-12-23 01:42:09,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95314b07e/2686ac9526c240bcaaf4671bf553d441/FLAG1bc986c89 [2020-12-23 01:42:09,737 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 01:42:09,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/locks/test_locks_10.c [2020-12-23 01:42:09,749 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95314b07e/2686ac9526c240bcaaf4671bf553d441/FLAG1bc986c89 [2020-12-23 01:42:10,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/95314b07e/2686ac9526c240bcaaf4671bf553d441 [2020-12-23 01:42:10,113 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 01:42:10,116 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 01:42:10,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 01:42:10,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 01:42:10,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 01:42:10,126 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c2005e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10, skipping insertion in model container [2020-12-23 01:42:10,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 01:42:10,174 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[~lk8~0,] left hand side expression in assignment: lhs: VariableLHS[~lk9~0,] left hand side expression in assignment: lhs: VariableLHS[~lk10~0,] 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[~lk8~0,] left hand side expression in assignment: lhs: VariableLHS[~lk9~0,] left hand side expression in assignment: lhs: VariableLHS[~lk10~0,] 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[~lk8~0,] left hand side expression in assignment: lhs: VariableLHS[~lk9~0,] left hand side expression in assignment: lhs: VariableLHS[~lk10~0,] [2020-12-23 01:42:10,356 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_10.c[3901,3914] [2020-12-23 01:42:10,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:42:10,372 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[~lk8~0,] left hand side expression in assignment: lhs: VariableLHS[~lk9~0,] left hand side expression in assignment: lhs: VariableLHS[~lk10~0,] 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[~lk8~0,] left hand side expression in assignment: lhs: VariableLHS[~lk9~0,] left hand side expression in assignment: lhs: VariableLHS[~lk10~0,] 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[~lk8~0,] left hand side expression in assignment: lhs: VariableLHS[~lk9~0,] left hand side expression in assignment: lhs: VariableLHS[~lk10~0,] [2020-12-23 01:42:10,405 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_10.c[3901,3914] [2020-12-23 01:42:10,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 01:42:10,424 INFO L208 MainTranslator]: Completed translation [2020-12-23 01:42:10,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10 WrapperNode [2020-12-23 01:42:10,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 01:42:10,426 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 01:42:10,427 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 01:42:10,427 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 01:42:10,436 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,458 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 01:42:10,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 01:42:10,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 01:42:10,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 01:42:10,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,567 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (1/1) ... [2020-12-23 01:42:10,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 01:42:10,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 01:42:10,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 01:42:10,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 01:42:10,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (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 [2020-12-23 01:42:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 01:42:10,727 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 01:42:10,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 01:42:10,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 01:42:11,410 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 01:42:11,410 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-23 01:42:11,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:42:11 BoogieIcfgContainer [2020-12-23 01:42:11,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 01:42:11,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 01:42:11,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 01:42:11,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 01:42:11,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:42:10" (1/3) ... [2020-12-23 01:42:11,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492f3860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:42:11, skipping insertion in model container [2020-12-23 01:42:11,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:42:10" (2/3) ... [2020-12-23 01:42:11,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492f3860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:42:11, skipping insertion in model container [2020-12-23 01:42:11,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:42:11" (3/3) ... [2020-12-23 01:42:11,433 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-12-23 01:42:11,442 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 01:42:11,449 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 01:42:11,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 01:42:11,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 01:42:11,526 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 01:42:11,526 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 01:42:11,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 01:42:11,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 01:42:11,527 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 01:42:11,527 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 01:42:11,528 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 01:42:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-12-23 01:42:11,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:42:11,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:11,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:11,557 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:11,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:11,565 INFO L82 PathProgramCache]: Analyzing trace with hash 153349273, now seen corresponding path program 1 times [2020-12-23 01:42:11,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:11,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870754810] [2020-12-23 01:42:11,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:11,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870754810] [2020-12-23 01:42:11,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:11,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:11,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476838797] [2020-12-23 01:42:11,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:11,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:11,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:11,894 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-12-23 01:42:11,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:11,945 INFO L93 Difference]: Finished difference Result 83 states and 145 transitions. [2020-12-23 01:42:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:11,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 01:42:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:11,961 INFO L225 Difference]: With dead ends: 83 [2020-12-23 01:42:11,962 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 01:42:11,965 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 [2020-12-23 01:42:11,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 01:42:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2020-12-23 01:42:12,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-23 01:42:12,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 86 transitions. [2020-12-23 01:42:12,015 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 86 transitions. Word has length 17 [2020-12-23 01:42:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,016 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 86 transitions. [2020-12-23 01:42:12,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 86 transitions. [2020-12-23 01:42:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-23 01:42:12,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 01:42:12,018 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,019 INFO L82 PathProgramCache]: Analyzing trace with hash -433456741, now seen corresponding path program 1 times [2020-12-23 01:42:12,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533128594] [2020-12-23 01:42:12,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533128594] [2020-12-23 01:42:12,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825591762] [2020-12-23 01:42:12,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,102 INFO L87 Difference]: Start difference. First operand 47 states and 86 transitions. Second operand 3 states. [2020-12-23 01:42:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,127 INFO L93 Difference]: Finished difference Result 114 states and 209 transitions. [2020-12-23 01:42:12,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-12-23 01:42:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,131 INFO L225 Difference]: With dead ends: 114 [2020-12-23 01:42:12,131 INFO L226 Difference]: Without dead ends: 69 [2020-12-23 01:42:12,136 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 [2020-12-23 01:42:12,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-23 01:42:12,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-12-23 01:42:12,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 01:42:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2020-12-23 01:42:12,160 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 17 [2020-12-23 01:42:12,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,160 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2020-12-23 01:42:12,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2020-12-23 01:42:12,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:42:12,162 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 01:42:12,163 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,164 INFO L82 PathProgramCache]: Analyzing trace with hash 459073515, now seen corresponding path program 1 times [2020-12-23 01:42:12,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983618449] [2020-12-23 01:42:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983618449] [2020-12-23 01:42:12,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479657775] [2020-12-23 01:42:12,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,278 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand 3 states. [2020-12-23 01:42:12,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,300 INFO L93 Difference]: Finished difference Result 105 states and 186 transitions. [2020-12-23 01:42:12,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,301 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 01:42:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,302 INFO L225 Difference]: With dead ends: 105 [2020-12-23 01:42:12,302 INFO L226 Difference]: Without dead ends: 72 [2020-12-23 01:42:12,303 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 [2020-12-23 01:42:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-23 01:42:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-12-23 01:42:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-23 01:42:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 124 transitions. [2020-12-23 01:42:12,313 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 124 transitions. Word has length 18 [2020-12-23 01:42:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,314 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 124 transitions. [2020-12-23 01:42:12,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 124 transitions. [2020-12-23 01:42:12,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:42:12,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 01:42:12,316 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,317 INFO L82 PathProgramCache]: Analyzing trace with hash -552043735, now seen corresponding path program 1 times [2020-12-23 01:42:12,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053869519] [2020-12-23 01:42:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053869519] [2020-12-23 01:42:12,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364355080] [2020-12-23 01:42:12,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,373 INFO L87 Difference]: Start difference. First operand 70 states and 124 transitions. Second operand 3 states. [2020-12-23 01:42:12,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,407 INFO L93 Difference]: Finished difference Result 133 states and 237 transitions. [2020-12-23 01:42:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,408 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 01:42:12,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,413 INFO L225 Difference]: With dead ends: 133 [2020-12-23 01:42:12,413 INFO L226 Difference]: Without dead ends: 131 [2020-12-23 01:42:12,414 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 [2020-12-23 01:42:12,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-23 01:42:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-12-23 01:42:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-23 01:42:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 165 transitions. [2020-12-23 01:42:12,432 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 165 transitions. Word has length 18 [2020-12-23 01:42:12,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,433 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 165 transitions. [2020-12-23 01:42:12,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,433 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 165 transitions. [2020-12-23 01:42:12,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 01:42:12,434 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 01:42:12,435 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1138849749, now seen corresponding path program 1 times [2020-12-23 01:42:12,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90042218] [2020-12-23 01:42:12,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90042218] [2020-12-23 01:42:12,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148697558] [2020-12-23 01:42:12,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,491 INFO L87 Difference]: Start difference. First operand 93 states and 165 transitions. Second operand 3 states. [2020-12-23 01:42:12,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,535 INFO L93 Difference]: Finished difference Result 221 states and 395 transitions. [2020-12-23 01:42:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,536 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-23 01:42:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,538 INFO L225 Difference]: With dead ends: 221 [2020-12-23 01:42:12,538 INFO L226 Difference]: Without dead ends: 133 [2020-12-23 01:42:12,539 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 [2020-12-23 01:42:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-23 01:42:12,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2020-12-23 01:42:12,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 01:42:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 231 transitions. [2020-12-23 01:42:12,564 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 231 transitions. Word has length 18 [2020-12-23 01:42:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,565 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 231 transitions. [2020-12-23 01:42:12,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 231 transitions. [2020-12-23 01:42:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:42:12,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 01:42:12,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,568 INFO L82 PathProgramCache]: Analyzing trace with hash 66727088, now seen corresponding path program 1 times [2020-12-23 01:42:12,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394046567] [2020-12-23 01:42:12,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394046567] [2020-12-23 01:42:12,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583005272] [2020-12-23 01:42:12,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,614 INFO L87 Difference]: Start difference. First operand 131 states and 231 transitions. Second operand 3 states. [2020-12-23 01:42:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,630 INFO L93 Difference]: Finished difference Result 198 states and 346 transitions. [2020-12-23 01:42:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,631 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 01:42:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,632 INFO L225 Difference]: With dead ends: 198 [2020-12-23 01:42:12,633 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 01:42:12,634 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 [2020-12-23 01:42:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 01:42:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2020-12-23 01:42:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 01:42:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 231 transitions. [2020-12-23 01:42:12,645 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 231 transitions. Word has length 19 [2020-12-23 01:42:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,645 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 231 transitions. [2020-12-23 01:42:12,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 231 transitions. [2020-12-23 01:42:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:42:12,647 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,647 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,648 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 01:42:12,648 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,649 INFO L82 PathProgramCache]: Analyzing trace with hash -944390162, now seen corresponding path program 1 times [2020-12-23 01:42:12,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659916815] [2020-12-23 01:42:12,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659916815] [2020-12-23 01:42:12,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759953209] [2020-12-23 01:42:12,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,706 INFO L87 Difference]: Start difference. First operand 133 states and 231 transitions. Second operand 3 states. [2020-12-23 01:42:12,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,752 INFO L93 Difference]: Finished difference Result 381 states and 665 transitions. [2020-12-23 01:42:12,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 01:42:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,755 INFO L225 Difference]: With dead ends: 381 [2020-12-23 01:42:12,755 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 01:42:12,757 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 [2020-12-23 01:42:12,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 01:42:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 253. [2020-12-23 01:42:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-12-23 01:42:12,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 435 transitions. [2020-12-23 01:42:12,797 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 435 transitions. Word has length 19 [2020-12-23 01:42:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,801 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 435 transitions. [2020-12-23 01:42:12,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,802 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 435 transitions. [2020-12-23 01:42:12,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-23 01:42:12,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,804 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:12,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-23 01:42:12,807 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,808 INFO L82 PathProgramCache]: Analyzing trace with hash -357584148, now seen corresponding path program 1 times [2020-12-23 01:42:12,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248814685] [2020-12-23 01:42:12,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:12,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:12,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248814685] [2020-12-23 01:42:12,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:12,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:12,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448504419] [2020-12-23 01:42:12,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:12,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:12,897 INFO L87 Difference]: Start difference. First operand 253 states and 435 transitions. Second operand 3 states. [2020-12-23 01:42:12,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:12,931 INFO L93 Difference]: Finished difference Result 321 states and 557 transitions. [2020-12-23 01:42:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:12,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-23 01:42:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:12,934 INFO L225 Difference]: With dead ends: 321 [2020-12-23 01:42:12,935 INFO L226 Difference]: Without dead ends: 319 [2020-12-23 01:42:12,936 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 [2020-12-23 01:42:12,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-23 01:42:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 253. [2020-12-23 01:42:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-12-23 01:42:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 431 transitions. [2020-12-23 01:42:12,950 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 431 transitions. Word has length 19 [2020-12-23 01:42:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:12,950 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 431 transitions. [2020-12-23 01:42:12,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 431 transitions. [2020-12-23 01:42:12,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 01:42:12,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:12,953 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] [2020-12-23 01:42:12,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-23 01:42:12,953 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:12,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:12,958 INFO L82 PathProgramCache]: Analyzing trace with hash 788890080, now seen corresponding path program 1 times [2020-12-23 01:42:12,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:12,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246132572] [2020-12-23 01:42:12,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246132572] [2020-12-23 01:42:13,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524983314] [2020-12-23 01:42:13,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,033 INFO L87 Difference]: Start difference. First operand 253 states and 431 transitions. Second operand 3 states. [2020-12-23 01:42:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,076 INFO L93 Difference]: Finished difference Result 469 states and 809 transitions. [2020-12-23 01:42:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-23 01:42:13,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,082 INFO L225 Difference]: With dead ends: 469 [2020-12-23 01:42:13,083 INFO L226 Difference]: Without dead ends: 467 [2020-12-23 01:42:13,103 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 [2020-12-23 01:42:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-12-23 01:42:13,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 353. [2020-12-23 01:42:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-12-23 01:42:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 591 transitions. [2020-12-23 01:42:13,132 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 591 transitions. Word has length 20 [2020-12-23 01:42:13,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,133 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 591 transitions. [2020-12-23 01:42:13,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,133 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 591 transitions. [2020-12-23 01:42:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-23 01:42:13,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,142 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] [2020-12-23 01:42:13,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 01:42:13,142 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,144 INFO L82 PathProgramCache]: Analyzing trace with hash 202084066, now seen corresponding path program 1 times [2020-12-23 01:42:13,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590838465] [2020-12-23 01:42:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590838465] [2020-12-23 01:42:13,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641350788] [2020-12-23 01:42:13,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,204 INFO L87 Difference]: Start difference. First operand 353 states and 591 transitions. Second operand 3 states. [2020-12-23 01:42:13,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,252 INFO L93 Difference]: Finished difference Result 837 states and 1409 transitions. [2020-12-23 01:42:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-12-23 01:42:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,264 INFO L225 Difference]: With dead ends: 837 [2020-12-23 01:42:13,264 INFO L226 Difference]: Without dead ends: 491 [2020-12-23 01:42:13,267 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 [2020-12-23 01:42:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2020-12-23 01:42:13,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 489. [2020-12-23 01:42:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 489 states. [2020-12-23 01:42:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 811 transitions. [2020-12-23 01:42:13,303 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 811 transitions. Word has length 20 [2020-12-23 01:42:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,304 INFO L481 AbstractCegarLoop]: Abstraction has 489 states and 811 transitions. [2020-12-23 01:42:13,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 811 transitions. [2020-12-23 01:42:13,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:42:13,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:13,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 01:42:13,306 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1313996925, now seen corresponding path program 1 times [2020-12-23 01:42:13,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967252242] [2020-12-23 01:42:13,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967252242] [2020-12-23 01:42:13,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065500344] [2020-12-23 01:42:13,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,338 INFO L87 Difference]: Start difference. First operand 489 states and 811 transitions. Second operand 3 states. [2020-12-23 01:42:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,359 INFO L93 Difference]: Finished difference Result 741 states and 1225 transitions. [2020-12-23 01:42:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,360 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 01:42:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,363 INFO L225 Difference]: With dead ends: 741 [2020-12-23 01:42:13,364 INFO L226 Difference]: Without dead ends: 503 [2020-12-23 01:42:13,365 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 [2020-12-23 01:42:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-12-23 01:42:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2020-12-23 01:42:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 501 states. [2020-12-23 01:42:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 819 transitions. [2020-12-23 01:42:13,388 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 819 transitions. Word has length 21 [2020-12-23 01:42:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,390 INFO L481 AbstractCegarLoop]: Abstraction has 501 states and 819 transitions. [2020-12-23 01:42:13,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,390 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 819 transitions. [2020-12-23 01:42:13,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:42:13,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:13,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 01:42:13,395 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1969853121, now seen corresponding path program 1 times [2020-12-23 01:42:13,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320531353] [2020-12-23 01:42:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320531353] [2020-12-23 01:42:13,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466402502] [2020-12-23 01:42:13,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,427 INFO L87 Difference]: Start difference. First operand 501 states and 819 transitions. Second operand 3 states. [2020-12-23 01:42:13,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,450 INFO L93 Difference]: Finished difference Result 905 states and 1501 transitions. [2020-12-23 01:42:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,450 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 01:42:13,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,456 INFO L225 Difference]: With dead ends: 905 [2020-12-23 01:42:13,456 INFO L226 Difference]: Without dead ends: 903 [2020-12-23 01:42:13,457 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 [2020-12-23 01:42:13,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2020-12-23 01:42:13,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 709. [2020-12-23 01:42:13,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 709 states. [2020-12-23 01:42:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 1131 transitions. [2020-12-23 01:42:13,484 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 1131 transitions. Word has length 21 [2020-12-23 01:42:13,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,485 INFO L481 AbstractCegarLoop]: Abstraction has 709 states and 1131 transitions. [2020-12-23 01:42:13,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 1131 transitions. [2020-12-23 01:42:13,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-23 01:42:13,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,487 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:13,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-23 01:42:13,487 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1383047107, now seen corresponding path program 1 times [2020-12-23 01:42:13,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073761655] [2020-12-23 01:42:13,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073761655] [2020-12-23 01:42:13,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578550752] [2020-12-23 01:42:13,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,515 INFO L87 Difference]: Start difference. First operand 709 states and 1131 transitions. Second operand 3 states. [2020-12-23 01:42:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,543 INFO L93 Difference]: Finished difference Result 1657 states and 2653 transitions. [2020-12-23 01:42:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,544 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-12-23 01:42:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,550 INFO L225 Difference]: With dead ends: 1657 [2020-12-23 01:42:13,550 INFO L226 Difference]: Without dead ends: 967 [2020-12-23 01:42:13,552 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 [2020-12-23 01:42:13,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2020-12-23 01:42:13,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 965. [2020-12-23 01:42:13,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 965 states. [2020-12-23 01:42:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1523 transitions. [2020-12-23 01:42:13,582 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1523 transitions. Word has length 21 [2020-12-23 01:42:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,583 INFO L481 AbstractCegarLoop]: Abstraction has 965 states and 1523 transitions. [2020-12-23 01:42:13,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,583 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1523 transitions. [2020-12-23 01:42:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:42:13,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:13,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-23 01:42:13,585 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash 936119319, now seen corresponding path program 1 times [2020-12-23 01:42:13,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478033342] [2020-12-23 01:42:13,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478033342] [2020-12-23 01:42:13,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720924476] [2020-12-23 01:42:13,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,613 INFO L87 Difference]: Start difference. First operand 965 states and 1523 transitions. Second operand 3 states. [2020-12-23 01:42:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,637 INFO L93 Difference]: Finished difference Result 1449 states and 2277 transitions. [2020-12-23 01:42:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,638 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-23 01:42:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,643 INFO L225 Difference]: With dead ends: 1449 [2020-12-23 01:42:13,644 INFO L226 Difference]: Without dead ends: 983 [2020-12-23 01:42:13,645 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 [2020-12-23 01:42:13,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-12-23 01:42:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 981. [2020-12-23 01:42:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-12-23 01:42:13,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1523 transitions. [2020-12-23 01:42:13,675 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1523 transitions. Word has length 22 [2020-12-23 01:42:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,676 INFO L481 AbstractCegarLoop]: Abstraction has 981 states and 1523 transitions. [2020-12-23 01:42:13,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1523 transitions. [2020-12-23 01:42:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:42:13,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:13,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-23 01:42:13,678 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,678 INFO L82 PathProgramCache]: Analyzing trace with hash -74997931, now seen corresponding path program 1 times [2020-12-23 01:42:13,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682290063] [2020-12-23 01:42:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682290063] [2020-12-23 01:42:13,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030669673] [2020-12-23 01:42:13,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,703 INFO L87 Difference]: Start difference. First operand 981 states and 1523 transitions. Second operand 3 states. [2020-12-23 01:42:13,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,743 INFO L93 Difference]: Finished difference Result 1737 states and 2741 transitions. [2020-12-23 01:42:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-23 01:42:13,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,753 INFO L225 Difference]: With dead ends: 1737 [2020-12-23 01:42:13,754 INFO L226 Difference]: Without dead ends: 1735 [2020-12-23 01:42:13,754 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 [2020-12-23 01:42:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2020-12-23 01:42:13,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1413. [2020-12-23 01:42:13,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1413 states. [2020-12-23 01:42:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 2131 transitions. [2020-12-23 01:42:13,823 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 2131 transitions. Word has length 22 [2020-12-23 01:42:13,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:13,824 INFO L481 AbstractCegarLoop]: Abstraction has 1413 states and 2131 transitions. [2020-12-23 01:42:13,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:13,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 2131 transitions. [2020-12-23 01:42:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-23 01:42:13,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:13,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:13,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-23 01:42:13,827 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash -661803945, now seen corresponding path program 1 times [2020-12-23 01:42:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:13,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350025867] [2020-12-23 01:42:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:13,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:13,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:13,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350025867] [2020-12-23 01:42:13,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:13,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:13,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016739294] [2020-12-23 01:42:13,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:13,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:13,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:13,869 INFO L87 Difference]: Start difference. First operand 1413 states and 2131 transitions. Second operand 3 states. [2020-12-23 01:42:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:13,918 INFO L93 Difference]: Finished difference Result 3273 states and 4949 transitions. [2020-12-23 01:42:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:13,919 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-12-23 01:42:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:13,930 INFO L225 Difference]: With dead ends: 3273 [2020-12-23 01:42:13,930 INFO L226 Difference]: Without dead ends: 1895 [2020-12-23 01:42:13,933 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 [2020-12-23 01:42:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2020-12-23 01:42:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1893. [2020-12-23 01:42:13,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1893 states. [2020-12-23 01:42:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2819 transitions. [2020-12-23 01:42:14,010 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2819 transitions. Word has length 22 [2020-12-23 01:42:14,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:14,010 INFO L481 AbstractCegarLoop]: Abstraction has 1893 states and 2819 transitions. [2020-12-23 01:42:14,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:14,010 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2819 transitions. [2020-12-23 01:42:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:42:14,013 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:14,013 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:14,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-23 01:42:14,014 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:14,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1970246488, now seen corresponding path program 1 times [2020-12-23 01:42:14,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:14,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659694500] [2020-12-23 01:42:14,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:14,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:14,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659694500] [2020-12-23 01:42:14,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:14,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:14,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782067510] [2020-12-23 01:42:14,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:14,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:14,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:14,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:14,049 INFO L87 Difference]: Start difference. First operand 1893 states and 2819 transitions. Second operand 3 states. [2020-12-23 01:42:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:14,126 INFO L93 Difference]: Finished difference Result 2841 states and 4213 transitions. [2020-12-23 01:42:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:14,126 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-23 01:42:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:14,136 INFO L225 Difference]: With dead ends: 2841 [2020-12-23 01:42:14,137 INFO L226 Difference]: Without dead ends: 1927 [2020-12-23 01:42:14,142 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 [2020-12-23 01:42:14,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2020-12-23 01:42:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1925. [2020-12-23 01:42:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1925 states. [2020-12-23 01:42:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 2819 transitions. [2020-12-23 01:42:14,209 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 2819 transitions. Word has length 23 [2020-12-23 01:42:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:14,209 INFO L481 AbstractCegarLoop]: Abstraction has 1925 states and 2819 transitions. [2020-12-23 01:42:14,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:14,209 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 2819 transitions. [2020-12-23 01:42:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:42:14,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:14,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:14,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-23 01:42:14,212 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:14,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:14,213 INFO L82 PathProgramCache]: Analyzing trace with hash 959129238, now seen corresponding path program 1 times [2020-12-23 01:42:14,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:14,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262844205] [2020-12-23 01:42:14,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:14,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:14,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262844205] [2020-12-23 01:42:14,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:14,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:14,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983202685] [2020-12-23 01:42:14,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:14,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:14,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:14,257 INFO L87 Difference]: Start difference. First operand 1925 states and 2819 transitions. Second operand 3 states. [2020-12-23 01:42:14,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:14,322 INFO L93 Difference]: Finished difference Result 3337 states and 4965 transitions. [2020-12-23 01:42:14,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:14,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-23 01:42:14,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:14,342 INFO L225 Difference]: With dead ends: 3337 [2020-12-23 01:42:14,342 INFO L226 Difference]: Without dead ends: 3335 [2020-12-23 01:42:14,345 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 [2020-12-23 01:42:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2020-12-23 01:42:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 2821. [2020-12-23 01:42:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2821 states. [2020-12-23 01:42:14,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2821 states to 2821 states and 4003 transitions. [2020-12-23 01:42:14,490 INFO L78 Accepts]: Start accepts. Automaton has 2821 states and 4003 transitions. Word has length 23 [2020-12-23 01:42:14,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:14,490 INFO L481 AbstractCegarLoop]: Abstraction has 2821 states and 4003 transitions. [2020-12-23 01:42:14,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:14,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2821 states and 4003 transitions. [2020-12-23 01:42:14,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-23 01:42:14,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:14,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:14,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-23 01:42:14,497 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:14,498 INFO L82 PathProgramCache]: Analyzing trace with hash 372323224, now seen corresponding path program 1 times [2020-12-23 01:42:14,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:14,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322791291] [2020-12-23 01:42:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:14,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322791291] [2020-12-23 01:42:14,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:14,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:14,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135102942] [2020-12-23 01:42:14,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:14,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:14,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:14,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:14,537 INFO L87 Difference]: Start difference. First operand 2821 states and 4003 transitions. Second operand 3 states. [2020-12-23 01:42:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:14,620 INFO L93 Difference]: Finished difference Result 6473 states and 9189 transitions. [2020-12-23 01:42:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:14,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-12-23 01:42:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:14,639 INFO L225 Difference]: With dead ends: 6473 [2020-12-23 01:42:14,640 INFO L226 Difference]: Without dead ends: 3719 [2020-12-23 01:42:14,644 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 [2020-12-23 01:42:14,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2020-12-23 01:42:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 3717. [2020-12-23 01:42:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-12-23 01:42:14,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 5187 transitions. [2020-12-23 01:42:14,770 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 5187 transitions. Word has length 23 [2020-12-23 01:42:14,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:14,770 INFO L481 AbstractCegarLoop]: Abstraction has 3717 states and 5187 transitions. [2020-12-23 01:42:14,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:14,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 5187 transitions. [2020-12-23 01:42:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:42:14,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:14,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:14,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-23 01:42:14,777 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:14,777 INFO L82 PathProgramCache]: Analyzing trace with hash -331549300, now seen corresponding path program 1 times [2020-12-23 01:42:14,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:14,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171645133] [2020-12-23 01:42:14,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:14,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171645133] [2020-12-23 01:42:14,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:14,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:14,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224156153] [2020-12-23 01:42:14,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:14,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:14,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:14,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:14,814 INFO L87 Difference]: Start difference. First operand 3717 states and 5187 transitions. Second operand 3 states. [2020-12-23 01:42:14,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:14,877 INFO L93 Difference]: Finished difference Result 5577 states and 7749 transitions. [2020-12-23 01:42:14,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:14,877 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-23 01:42:14,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:14,895 INFO L225 Difference]: With dead ends: 5577 [2020-12-23 01:42:14,896 INFO L226 Difference]: Without dead ends: 3783 [2020-12-23 01:42:14,899 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 [2020-12-23 01:42:14,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2020-12-23 01:42:15,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3781. [2020-12-23 01:42:15,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3781 states. [2020-12-23 01:42:15,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 5187 transitions. [2020-12-23 01:42:15,049 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 5187 transitions. Word has length 24 [2020-12-23 01:42:15,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:15,050 INFO L481 AbstractCegarLoop]: Abstraction has 3781 states and 5187 transitions. [2020-12-23 01:42:15,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:15,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 5187 transitions. [2020-12-23 01:42:15,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:42:15,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:15,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:15,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-23 01:42:15,061 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:15,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:15,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1342666550, now seen corresponding path program 1 times [2020-12-23 01:42:15,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:15,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699283144] [2020-12-23 01:42:15,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:15,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699283144] [2020-12-23 01:42:15,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:15,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:15,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52404112] [2020-12-23 01:42:15,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:15,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:15,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:15,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:15,092 INFO L87 Difference]: Start difference. First operand 3781 states and 5187 transitions. Second operand 3 states. [2020-12-23 01:42:15,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:15,192 INFO L93 Difference]: Finished difference Result 6409 states and 8901 transitions. [2020-12-23 01:42:15,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:15,192 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-23 01:42:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:15,242 INFO L225 Difference]: With dead ends: 6409 [2020-12-23 01:42:15,242 INFO L226 Difference]: Without dead ends: 6407 [2020-12-23 01:42:15,246 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 [2020-12-23 01:42:15,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6407 states. [2020-12-23 01:42:15,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6407 to 5637. [2020-12-23 01:42:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5637 states. [2020-12-23 01:42:15,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 7491 transitions. [2020-12-23 01:42:15,489 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 7491 transitions. Word has length 24 [2020-12-23 01:42:15,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:15,489 INFO L481 AbstractCegarLoop]: Abstraction has 5637 states and 7491 transitions. [2020-12-23 01:42:15,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:15,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 7491 transitions. [2020-12-23 01:42:15,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-23 01:42:15,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:15,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:15,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-23 01:42:15,501 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:15,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:15,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1929472564, now seen corresponding path program 1 times [2020-12-23 01:42:15,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:15,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130131900] [2020-12-23 01:42:15,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:15,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130131900] [2020-12-23 01:42:15,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:15,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731825573] [2020-12-23 01:42:15,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:15,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:15,544 INFO L87 Difference]: Start difference. First operand 5637 states and 7491 transitions. Second operand 3 states. [2020-12-23 01:42:15,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:15,702 INFO L93 Difference]: Finished difference Result 12809 states and 16965 transitions. [2020-12-23 01:42:15,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:15,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-12-23 01:42:15,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:15,721 INFO L225 Difference]: With dead ends: 12809 [2020-12-23 01:42:15,721 INFO L226 Difference]: Without dead ends: 7303 [2020-12-23 01:42:15,731 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 [2020-12-23 01:42:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2020-12-23 01:42:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 7301. [2020-12-23 01:42:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7301 states. [2020-12-23 01:42:15,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 9475 transitions. [2020-12-23 01:42:15,962 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 9475 transitions. Word has length 24 [2020-12-23 01:42:15,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:15,962 INFO L481 AbstractCegarLoop]: Abstraction has 7301 states and 9475 transitions. [2020-12-23 01:42:15,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:15,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 9475 transitions. [2020-12-23 01:42:15,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:42:15,974 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:15,974 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:15,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-23 01:42:15,974 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:15,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:15,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1327225645, now seen corresponding path program 1 times [2020-12-23 01:42:15,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:15,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441421290] [2020-12-23 01:42:15,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:16,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441421290] [2020-12-23 01:42:16,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:16,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:16,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050319140] [2020-12-23 01:42:16,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:16,028 INFO L87 Difference]: Start difference. First operand 7301 states and 9475 transitions. Second operand 3 states. [2020-12-23 01:42:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:16,206 INFO L93 Difference]: Finished difference Result 10953 states and 14149 transitions. [2020-12-23 01:42:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:16,206 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 01:42:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:16,224 INFO L225 Difference]: With dead ends: 10953 [2020-12-23 01:42:16,224 INFO L226 Difference]: Without dead ends: 7431 [2020-12-23 01:42:16,231 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 [2020-12-23 01:42:16,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2020-12-23 01:42:16,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7429. [2020-12-23 01:42:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7429 states. [2020-12-23 01:42:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7429 states to 7429 states and 9475 transitions. [2020-12-23 01:42:16,466 INFO L78 Accepts]: Start accepts. Automaton has 7429 states and 9475 transitions. Word has length 25 [2020-12-23 01:42:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:16,466 INFO L481 AbstractCegarLoop]: Abstraction has 7429 states and 9475 transitions. [2020-12-23 01:42:16,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 7429 states and 9475 transitions. [2020-12-23 01:42:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:42:16,476 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:16,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:16,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-23 01:42:16,476 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:16,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:16,477 INFO L82 PathProgramCache]: Analyzing trace with hash 316108395, now seen corresponding path program 1 times [2020-12-23 01:42:16,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:16,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174544734] [2020-12-23 01:42:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:16,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174544734] [2020-12-23 01:42:16,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:16,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:16,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403958896] [2020-12-23 01:42:16,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:16,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:16,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:16,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:16,513 INFO L87 Difference]: Start difference. First operand 7429 states and 9475 transitions. Second operand 3 states. [2020-12-23 01:42:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:16,736 INFO L93 Difference]: Finished difference Result 12297 states and 15749 transitions. [2020-12-23 01:42:16,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:16,737 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 01:42:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:16,765 INFO L225 Difference]: With dead ends: 12297 [2020-12-23 01:42:16,765 INFO L226 Difference]: Without dead ends: 12295 [2020-12-23 01:42:16,770 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 [2020-12-23 01:42:16,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2020-12-23 01:42:17,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 11269. [2020-12-23 01:42:17,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11269 states. [2020-12-23 01:42:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 13955 transitions. [2020-12-23 01:42:17,109 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 13955 transitions. Word has length 25 [2020-12-23 01:42:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:17,109 INFO L481 AbstractCegarLoop]: Abstraction has 11269 states and 13955 transitions. [2020-12-23 01:42:17,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 13955 transitions. [2020-12-23 01:42:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-23 01:42:17,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:17,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:17,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-23 01:42:17,126 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:17,127 INFO L82 PathProgramCache]: Analyzing trace with hash -270697619, now seen corresponding path program 1 times [2020-12-23 01:42:17,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:17,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499510880] [2020-12-23 01:42:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:17,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499510880] [2020-12-23 01:42:17,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:17,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:17,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045561826] [2020-12-23 01:42:17,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:17,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:17,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:17,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:17,155 INFO L87 Difference]: Start difference. First operand 11269 states and 13955 transitions. Second operand 3 states. [2020-12-23 01:42:17,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:17,386 INFO L93 Difference]: Finished difference Result 25353 states and 31109 transitions. [2020-12-23 01:42:17,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:17,387 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-23 01:42:17,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:17,418 INFO L225 Difference]: With dead ends: 25353 [2020-12-23 01:42:17,418 INFO L226 Difference]: Without dead ends: 14343 [2020-12-23 01:42:17,437 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 [2020-12-23 01:42:17,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2020-12-23 01:42:17,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 14341. [2020-12-23 01:42:17,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14341 states. [2020-12-23 01:42:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14341 states to 14341 states and 17155 transitions. [2020-12-23 01:42:18,072 INFO L78 Accepts]: Start accepts. Automaton has 14341 states and 17155 transitions. Word has length 25 [2020-12-23 01:42:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:18,072 INFO L481 AbstractCegarLoop]: Abstraction has 14341 states and 17155 transitions. [2020-12-23 01:42:18,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:18,073 INFO L276 IsEmpty]: Start isEmpty. Operand 14341 states and 17155 transitions. [2020-12-23 01:42:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:42:18,091 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:18,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:18,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-23 01:42:18,092 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:18,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:18,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1209641729, now seen corresponding path program 1 times [2020-12-23 01:42:18,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:18,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072897578] [2020-12-23 01:42:18,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:18,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072897578] [2020-12-23 01:42:18,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:18,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:18,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933503871] [2020-12-23 01:42:18,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:18,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:18,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:18,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:18,117 INFO L87 Difference]: Start difference. First operand 14341 states and 17155 transitions. Second operand 3 states. [2020-12-23 01:42:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:18,325 INFO L93 Difference]: Finished difference Result 21513 states and 25605 transitions. [2020-12-23 01:42:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:18,326 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-23 01:42:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:18,358 INFO L225 Difference]: With dead ends: 21513 [2020-12-23 01:42:18,359 INFO L226 Difference]: Without dead ends: 14599 [2020-12-23 01:42:18,370 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 [2020-12-23 01:42:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14599 states. [2020-12-23 01:42:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14599 to 14597. [2020-12-23 01:42:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14597 states. [2020-12-23 01:42:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14597 states to 14597 states and 17155 transitions. [2020-12-23 01:42:18,842 INFO L78 Accepts]: Start accepts. Automaton has 14597 states and 17155 transitions. Word has length 26 [2020-12-23 01:42:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:18,842 INFO L481 AbstractCegarLoop]: Abstraction has 14597 states and 17155 transitions. [2020-12-23 01:42:18,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 14597 states and 17155 transitions. [2020-12-23 01:42:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:42:18,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:18,860 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:18,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-23 01:42:18,860 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:18,860 INFO L82 PathProgramCache]: Analyzing trace with hash 198524479, now seen corresponding path program 1 times [2020-12-23 01:42:18,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:18,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774160610] [2020-12-23 01:42:18,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:18,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774160610] [2020-12-23 01:42:18,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:18,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:18,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112707174] [2020-12-23 01:42:18,880 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:18,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:18,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:18,881 INFO L87 Difference]: Start difference. First operand 14597 states and 17155 transitions. Second operand 3 states. [2020-12-23 01:42:19,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:19,283 INFO L93 Difference]: Finished difference Result 23559 states and 27396 transitions. [2020-12-23 01:42:19,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:19,283 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-23 01:42:19,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:19,338 INFO L225 Difference]: With dead ends: 23559 [2020-12-23 01:42:19,338 INFO L226 Difference]: Without dead ends: 23557 [2020-12-23 01:42:19,344 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 [2020-12-23 01:42:19,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23557 states. [2020-12-23 01:42:19,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23557 to 22533. [2020-12-23 01:42:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22533 states. [2020-12-23 01:42:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22533 states to 22533 states and 25859 transitions. [2020-12-23 01:42:20,003 INFO L78 Accepts]: Start accepts. Automaton has 22533 states and 25859 transitions. Word has length 26 [2020-12-23 01:42:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:20,003 INFO L481 AbstractCegarLoop]: Abstraction has 22533 states and 25859 transitions. [2020-12-23 01:42:20,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22533 states and 25859 transitions. [2020-12-23 01:42:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 01:42:20,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 01:42:20,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 01:42:20,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-23 01:42:20,057 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 01:42:20,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 01:42:20,058 INFO L82 PathProgramCache]: Analyzing trace with hash -388281535, now seen corresponding path program 1 times [2020-12-23 01:42:20,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 01:42:20,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359281575] [2020-12-23 01:42:20,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 01:42:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 01:42:20,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 01:42:20,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359281575] [2020-12-23 01:42:20,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 01:42:20,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 01:42:20,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797009019] [2020-12-23 01:42:20,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 01:42:20,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 01:42:20,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 01:42:20,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 01:42:20,099 INFO L87 Difference]: Start difference. First operand 22533 states and 25859 transitions. Second operand 3 states. [2020-12-23 01:42:20,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 01:42:20,738 INFO L93 Difference]: Finished difference Result 50181 states and 56579 transitions. [2020-12-23 01:42:20,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 01:42:20,739 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-12-23 01:42:20,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 01:42:20,739 INFO L225 Difference]: With dead ends: 50181 [2020-12-23 01:42:20,740 INFO L226 Difference]: Without dead ends: 0 [2020-12-23 01:42:20,774 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 [2020-12-23 01:42:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-23 01:42:20,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-23 01:42:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-23 01:42:20,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-23 01:42:20,776 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2020-12-23 01:42:20,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 01:42:20,776 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-23 01:42:20,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 01:42:20,776 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-23 01:42:20,776 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-23 01:42:20,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-12-23 01:42:20,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-23 01:42:20,897 WARN L197 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-23 01:42:20,910 INFO L189 CegarLoopUtils]: For program point L126(line 126) no Hoare annotation was computed. [2020-12-23 01:42:20,910 INFO L189 CegarLoopUtils]: For program point L151(line 151) no Hoare annotation was computed. [2020-12-23 01:42:20,913 INFO L189 CegarLoopUtils]: For program point L110-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,913 INFO L189 CegarLoopUtils]: For program point L135-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,913 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-23 01:42:20,913 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-12-23 01:42:20,913 INFO L189 CegarLoopUtils]: For program point L111(line 111) no Hoare annotation was computed. [2020-12-23 01:42:20,913 INFO L189 CegarLoopUtils]: For program point L136(line 136) no Hoare annotation was computed. [2020-12-23 01:42:20,914 INFO L192 CegarLoopUtils]: At program point L161(lines 7 165) the Hoare annotation is: true [2020-12-23 01:42:20,914 INFO L189 CegarLoopUtils]: For program point L120-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,914 INFO L189 CegarLoopUtils]: For program point L145-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,914 INFO L189 CegarLoopUtils]: For program point L104-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L96-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L121(line 121) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L88-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L146(line 146) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L80-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L72-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L189 CegarLoopUtils]: For program point L130-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,915 INFO L192 CegarLoopUtils]: At program point L155-1(lines 41 160) the Hoare annotation is: true [2020-12-23 01:42:20,915 INFO L192 CegarLoopUtils]: At program point L164(lines 6 165) the Hoare annotation is: true [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point L131(line 131) no Hoare annotation was computed. [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point L156(line 156) no Hoare annotation was computed. [2020-12-23 01:42:20,916 INFO L185 CegarLoopUtils]: At program point L156-1(lines 7 165) the Hoare annotation is: false [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 163) no Hoare annotation was computed. [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point L115-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point L140-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,916 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L116(line 116) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L141(line 141) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L100-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L125-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L92-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L150-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L84-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L43(lines 43 45) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L76-1(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,917 INFO L189 CegarLoopUtils]: For program point L68(lines 68 70) no Hoare annotation was computed. [2020-12-23 01:42:20,918 INFO L189 CegarLoopUtils]: For program point L68-2(lines 41 160) no Hoare annotation was computed. [2020-12-23 01:42:20,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 01:42:20 BoogieIcfgContainer [2020-12-23 01:42:20,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 01:42:20,936 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 01:42:20,936 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 01:42:20,936 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 01:42:20,937 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:42:11" (3/4) ... [2020-12-23 01:42:20,942 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-23 01:42:20,959 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-12-23 01:42:20,960 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-23 01:42:20,960 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 01:42:20,961 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-23 01:42:21,043 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/locks/test_locks_10.c-witness.graphml [2020-12-23 01:42:21,043 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 01:42:21,045 INFO L168 Benchmark]: Toolchain (without parser) took 10929.39 ms. Allocated memory was 161.5 MB in the beginning and 807.4 MB in the end (delta: 645.9 MB). Free memory was 136.4 MB in the beginning and 603.9 MB in the end (delta: -467.5 MB). Peak memory consumption was 179.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,046 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 161.5 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 01:42:21,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.44 ms. Allocated memory is still 161.5 MB. Free memory was 136.3 MB in the beginning and 125.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,047 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.86 ms. Allocated memory is still 161.5 MB. Free memory was 125.1 MB in the beginning and 123.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,048 INFO L168 Benchmark]: Boogie Preprocessor took 69.40 ms. Allocated memory is still 161.5 MB. Free memory was 123.4 MB in the beginning and 122.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,048 INFO L168 Benchmark]: RCFGBuilder took 834.53 ms. Allocated memory is still 161.5 MB. Free memory was 122.1 MB in the beginning and 139.3 MB in the end (delta: -17.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,049 INFO L168 Benchmark]: TraceAbstraction took 9518.34 ms. Allocated memory was 161.5 MB in the beginning and 807.4 MB in the end (delta: 645.9 MB). Free memory was 138.8 MB in the beginning and 607.6 MB in the end (delta: -468.9 MB). Peak memory consumption was 276.7 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,049 INFO L168 Benchmark]: Witness Printer took 107.48 ms. Allocated memory is still 807.4 MB. Free memory was 607.6 MB in the beginning and 603.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2020-12-23 01:42:21,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 161.5 MB. Free memory is still 133.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 306.44 ms. Allocated memory is still 161.5 MB. Free memory was 136.3 MB in the beginning and 125.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 76.86 ms. Allocated memory is still 161.5 MB. Free memory was 125.1 MB in the beginning and 123.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.40 ms. Allocated memory is still 161.5 MB. Free memory was 123.4 MB in the beginning and 122.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 834.53 ms. Allocated memory is still 161.5 MB. Free memory was 122.1 MB in the beginning and 139.3 MB in the end (delta: -17.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 9518.34 ms. Allocated memory was 161.5 MB in the beginning and 807.4 MB in the end (delta: 645.9 MB). Free memory was 138.8 MB in the beginning and 607.6 MB in the end (delta: -468.9 MB). Peak memory consumption was 276.7 MB. Max. memory is 8.0 GB. * Witness Printer took 107.48 ms. Allocated memory is still 807.4 MB. Free memory was 607.6 MB in the beginning and 603.9 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 163]: 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: 41]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9.2s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2304 SDtfs, 1149 SDslu, 1533 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22533occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.7s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 1033 NumberOfFragments, 4 HoareAnnotationTreeSize, 4 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 608 NumberOfCodeBlocks, 608 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 580 ConstructedInterpolants, 0 QuantifiedInterpolants, 25948 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...